LONDON

Natural History Museum & Imperial College

We invite all academic and professional economic geologists, geochemists, mineralogists and environmental scientists to come to this historic joint meeting of the SGA and IAGOD in London to discuss current research under the general theme: "Mineral Deposits: Processes to Processing".

The venue for the meeting is the main site of the Imperial College of Science, Technology and Medicine, home to the Royal School of Mines situated just to the south of Hyde Park in South Kensington, the cultural centre of London. 300 beds have been reserved in the recently upgraded student accommodation on campus and hotel accommodation is also available nearby. The nearby Natural History Museum with its recently redesigned Earth Galleries will be the location for a reception in the Rio Tinto atrium.

By air : London has five airports, Heathrow, Gatwick, City, Stansted and Luton. Busiest is Heathrow with excellent transport links by London Underground Piccadilly line to South Kensington (about £3-4) or by Airbus No 1 (£5 - ask for South Kensington). A taxi is about £35. Gatwick is further away and requires a train journey to Victoria Station (about £10) and a short ride on the District Line underground to South Kensington. Stansted and Luton are not so conveniently situated, while City airport caters mostly for business people.

By train : Direct rail links to London Waterloo through the Channel Tunnel from Paris and Brussels now exist. Waterloo to South Kensington is a short journey on the underground involving one change of line, or a £10 taxi ride. Other mainline stations serve trains picking up passengers from the ferries, notably Liverpool Street for trains from Harwich.

By bus : Scheduled coach services exist from Eastern and Central Europe and some Western European cities. The main terminus in London is Victoria Coach Station. This is only a few minutes from the underground and South Kensington is just two stops on the District Line.

By car : Although London is less congested with traffic at this time of year, parking is expensive. No car parking space has been booked at Imperial College.

Participants should check with the British Consulate or Embassy in their country as to whether they need a visa to enter the United Kingdom. If you need a letter of invitation from the Organizing Committee, please ask for this as soon as possible.

London in late summer can be warm and dry with the risk of the occasional thunderstorm, but remember that we have a maritime climate which is rather less predictable than continental climates. Bring a raincoat and umbrella, just in case!

There will be three days of oral and poster presentations with parallel sessions. The opening half day will be devoted to three or four plenary lectures.

1. Fluid inclusions and ore formation processes (COFFI) (R.Bodnar, J.Naden, J.Wilkinson, A.Rankin)

2. Organics in the formation of mineral deposits and remediation of mining sites (IGCP 429) (A. Gize, J.Pasava & A.Fleet)

3. Ore-bearing granitic systems: anatomy and magmatic-hydrothermal evolution (IGCP 373 and WGTT) (R.Seltmann, C.Halls, & M.Stemprok)

4. Volcanism and mineralization: terrestrial and submarine (R.Herrington & R.Hill)

5. Ore-forming processes associated with mafic, ultramafic and alkaline rocks, carbonatites, and kimberlites (IGCP 427, CODMUR) (H.Prichard, F.Wall, C.T.Williams, & I.McDonald)

6. Sediment-hosted mineral deposits (J.Wilkinson & D.Cooke)

7. Metamorphism and ore formation

8. Processes of formation and geology of industrial mineral deposits (COFAB) (P.Scott, S.H.B.Clark, & S.Akande)

9. Technological advances in mineral processing (R.Pascoe & R.Ixer)

10. Environmental aspects of mineral deposits (E.Valsami-Jones)

11. Timing of ore-forming processes, palaeoenvironmental change and geochronology (Commission on Manganese)

12. Geodynamics and ore deposit provinces (GEODE) (F.Neubauer & D.Blundell)

13. Open session

Co-ordinator: Dr D.H.M.Alderton E-mail: D.Alderton@rhbnc.ac.uk

For pre-meeting and post meeting short courses and workshops please pre-register your interest with the co-ordinator above.

Course leader: Dr T.V. Possukhova, Moscow State University, Russia

1. Geological structure and petrological and mineralogical peculiarities of the Yakutian kimberlites (Mir and Udachnaya pipes) including characteristics of the diamonds, coexisting minerals, and xenoliths of mantle rocks; 2. Geological position, petrological characteristics and mineralogy of the Arkhangelsk kimberlite province (M.V.Lomonosov deposit) including morphology and quality of diamonds, chemistry of minerals associated with diamonds and minerals from kimberlite groundmass; 3. Geological position and mineralogical characteristics of placer deposits (Timan, Ural, North Yakutia) including morphology and quality of diamonds, chemistry and morphology of coexisting minerals, hypotheses of origins.

August 22nd. Minimum 12 participants. Cost £75.

Workshop Leader: Prof J.J.Jedwab, Université Libre de Bruxelles, Belgium [also involving A.Criddle, J.Spratt, & C.T.Williams, Natural History Museum]

1. Introductory lecture on unconventional PGMs and PGE-containing minerals, undefined compounds and associations. Including special detection techniques, types of compound and tentative classification, localities, typical deposits, origins, etc.; 2. Demonstration of Platinum Group compounds under the reflected light microscope; 3. Demonstration of Platinum Group elements with back scattered SEM or electron microprobe.

August 22nd. Minimum 10, maximum 30 participants. Cost £100.

Course leader: Dr Hans E Madeisky, HEMAC Exploration, Canada

Lithogeochemical exploration, like every other geochemical method, depends on recognizing element concentrations and distribution patterns which are significantly different from local background in order to identify prospective exploration targets. In order to separate the background variations in the geochemistry of unaltered rocks from the variations superimposed by later hydrothermal alteration, a new method of analyzing whole-rock geochemical data has been developed. It is an adaptation of a petrologic modelling technique originally designed to study mass transfer processes in igneous systems. The fractionation models used by that technique have been adapted for use in lithogeochemical exploration. By quantifying hydrothermal alteration, this method can identify lithogeochemical vectors which point to the core of a hydrothermal system and, if it exists, to mineralization. The method has been applied to deposits hosted in a variety of terranes, with metamorphic grades ranging from greenschist to upper amphibolite. Deposit types include volcanic- and sediment-hosted massive sulphide, volcanic-hosted epithermal gold, mesothermal vein, carbonate-hosted (Carlin type) gold, porphyry Cu-Au and Archaean shear zone hosted gold deposits.

August 22nd. Minimum 10 participants. Cost £150.

Workshop Leader: Prof E.M.Spiridonov, Moscow State University, Russia

First lecture. Main types of gold deposits: plutonogene (mesothermal), volcanogene, volcano-plutonogene, epithermal (telethermal) and crust of weathering. (1-1.5 hours).

Second lecture includes the following items (2-3 hours): 1. Mineralogy of the Au-Ag-Hg system (Stepnyak, Dzhelambet, North Aksu, Kwartzitovye Gorki in North Kazakhstan; Kyuchus in Yakutia; Baley in Transbaikalia; Berezovsk at the Urals; Muruntau in Uzbekistan and other Au deposits in Eroupe and Asia and others); 2. Mineralogy of the Au-Cu system (Zolotaya Gora, Zhelannoe at the Urals and others); 3. Mineralogy of the Au-Bi and Au-Sb systems (Bestyube in North Kazakhstan; Golgotay in Transbaikalia; Zarmitan in Uzbekistan; Sarylakh and Sentachan in Yakutia and others).

Third lecture includes the following items (2-3 hours): 1. Mineralogy of the Au-Ag(Cu)-Te system (Zhana-Tyube, South Aksu, Karaagach in Kazakhstan; Kochbulak in Uzbekistan; Kochkar at the Urals; Zod in Armenia and others); 2. Mineralogy of the Au-Ag-Se,S system (Maykain in Kazakhstan; Zavodinskoe at Altay; Przhedborzhitze in Czech Republic and others); 3. Au-Ag-Bi-Pb-Tl-As-Sb complex sulfides; 4. Au(Ag)-Cu(Fe)-Te(Pb,Bi,Sb) minerals (Aginskoe, Ozernovskoe and other deposits of Kamchatka; Pioneerskoe in Sayans; Kalgoorlie and others).

Lectures are accompanied by demonstration of numerous slides, samples and polished sections.

August 22nd. Minimum 5, maximum 30 participants. Cost £100.

Course Leaders: J.Leventhal (USGS, Denver), A.Gize (University of Manchester)

The short course is divided into two 1/2 day sections.

The first section will be an introduction to organic processes in the Earth's crust, which will assume no prior knowledge of organic geochemistry. The processes covered will include transformations between the biosphere and the geosphere, and the different types of organic-metal interactions which occur. Special emphasis will be placed on soil organic matter (e.g. humic materials) and their metal interactions. The second section will be an advanced introduction to applications of organic geochemistry and petrology to ore deposit studies. Topics to be covered will include Mississippi Valley-type Pb-Zn, SEDEX-type, Carlin type Au, Kupferschiefer, and uranium deposits. Emphasis will be placed on their genesis, analytical methods, and their interpretation (chromatography, mass spectrometry, microscopy) and carbon-sulphur-iron relationships.

August 22nd. Minimum 25. Cost: section 1, £40; section2, £50.

Course Leaders: Prof Ross Large, Associate Prof Tony Crawford, Drs Jocelyn McPhie & Bruce Gemmell, Centre for Ore Deposit Research, University of Tasmania

1. Styles of Australian VHMS deposits, including Cu-rich types, Zn-Pb rich types and gold-rich types; 2. Examples discussed include Rosebery, Hellyer, Que River, Henty, Mt Lyell (Tasmania); Thalanga, Mt Chalmers , Mt Morgan (Queensland); Scuddles, Gossan Hill (Western Australia). Comparisons are made with other global VMS districts; 3. Tectonic environments and volcanic geochemistry; 4. Volcanic facies architecture of VHMS districts; 5. Alteration styles and geochemistry; 6. Genetic models and comparisons to current seafloor hydrothermal systems; 7. Mineral exploration case histories and key criteria.

2 day course 21-22 August. Minimum 10, maximum 40. Cost: £300.

Course Leaders: Patrick J. Williams and Peter J. Pollard (Economic Geology Research Unit, James Cook University, Queensland, Australia)

Are you interested in the magmatic versus amagmatic debate for Fe oxide-Cu-Au deposits (e.g. Candelaria, Olympic Dam and Ernest Henry) and are you labouring under the misconception that the Cloncurry Cu-Au deposits such as Ernest Henry are hosted in banded iron formations? Are you unaware of evidence that Broken Hill-type deposits may have been transported to their current locations by the same sorts of hot high salinity fluids that formed these distinctive Cu-Au deposits? This short course is for you if you are intrigued by any of these questions or would simply like to know more about the essential geology of the newly recognized class of Fe-rich Cu-Au deposits that is particularly well represented in Australian Proterozoic rocks. The course presenters have recent hands on research experience in several of Australia's very largest ore systems (e.g. Broken Hill, Cannington, Ernest Henry, Olympic Dam) and are also studying Fe-rich Cu-Au systems in younger rocks (e.g Ertzberg-Grasberg complex, Irian Jaya). They will outline some major advances in understanding of Fe oxide-Cu-Au deposits that have occurred in the last few years including unpublished results of large industry-funded research projects in the Mount Isa - Cloncurry province that will be available for the first time in an international public forum.

August 22nd. Minimum 10, maximum 30. Cost £150.

Workshop leaders: J.Kutina, Pei Rongfu, D.V.Rundqvist and P.Laznicka

This will incorporate CTOD/IGCP-354 together with CTOD WG5 "Remote sensing methods for Tectonics and Ore Prospecting".

25th August (provisionally) All welcome. No charge to registrants for meeting.

Course Leaders: Drs Peter McGoldrick, Stuart Bull, David Cooke, Prof Ross Large (Centre for Ore Deposit Research, University of Tasmania) and Dr Martin K. Neudert (School of Natural Resource Sciences, Queensland University of Technology)

26th August: 1. Introduction (McGoldrick); 2. Geology and zinc-lead-silver deposits of the Carpentaria Zinc Belt of northern Australia (Bull, Neudert & McGoldrick); 3. Detailed 3D sub-basin reconstruction of the area around HYC (Neudert); 4. Mount Isa Group sedimentology, setting, depositional /diagenetic/ alteration processes (Neudert).

27th August: 5. Geochemistry of metal transport in SEDEX deposits (Cooke); 6. Lithogeochemical and isotopic halos to northern Australian SEDEX' deposits (Large & McGoldrick); 7. SEDEX genetic models for HYC and Lady Loretta (Large and McGoldrick); 8. Diagenetic models for HYC and Mount Isa mineralisation (Neudert); 9. Geochemistry of metal transport in SEDEX deposits (Cooke); 10. Differences between Broken Hill type and SEDEX Zn-Pb deposits (Large and Cooke).

2 days 26 -27 August. Minimum 15, maximum 40. Cost: £300 or single day at £180.

Please pre-register an interest in taking part in any of the field excursions with the named organiser (underlined) by e-mail or fax. All excursions are offered on a first come, first served basis.

10 - 19th August, 1999.

Start and end: Miass, Chelyabinsk district, Russia.

Leaders: Prof Viktor Zaykov, Institute of Mineralogy, Urals Branch, Russian Academy of Sciences, Miass, Chelyabinsk district, 456301 Russia [fax: +7 35135 50286; e-mail: zaykov@imin.urc.ac.ru ] or Dr Richard Herrington, Department of Mineralogy, Natural History Museum, Cromwell Road, London SW7 5BD [fax: +44 171 938 9268; e-mail: R.Herrington@nhm.ac.uk ].

Cost: £700 per person not including transport from London to Ekaterinburg and back [current Apex fare London-Ekaterinberg-London with Lufthansa is about £500 - cheaper flights can be booked with Aeroflot or Transaero].

Excursion will visit classic Cu-Zn 'Uralian-type' massive sulphides (several deposits more than 100 million tonnes at 3-5% Cu+Zn) and Cu-Zn-Ba-Au 'Kuroko-type' deposits (largest 20 million tonnes at 8-10% Cu+Zn, 3-5g/T Au and 15-30g/T Ag). Three days will be spent in the northern part of the south Urals at Uchaly, Molodyezhnoe open pit Cu-Zn deposits, Uzelga underground Cu-Zn deposit and Urazovskoe Mn deposit. The remainder of the visits will be further south at Sibay and Yubilenoye Cu-Zn open pits, Tash Tau, Alexandrinka Cu-Zn-Ba-Au open pit deposits. Further visits may include the Fayzullino, Kyzyl-Tash Mn open pits. Drill core displays are planned from new deposits.

15 - 19th August

Leaders: Vladimir N. Sazonov and Nikolai S. Bortnikov [ Bortnikov@igem.msk.su ].

Maximum and minimum numbers of participants: 20. Cost per person: £700.

Start at: Ekaterinburg, August 15; End at: Ekaterinburg, August 19.

[NB. Travel expenses between Ekaterinburg and London are not included, current Apex fare London-Ekaterinburg-London with Lufthansa is about £500 - cheaper flights can be booked with Aeroflot or Transaero].

The Berezovsk deposit, the largest gold-quartz deposit in the Urals has been mined for 250 years. The deposit, which has an annual output of up to 2t Au, is situated within Berezovsk town which is on the east side of Ekaterinburg. The numerous ore veins of the deposit have been fully worked to 100-250 m below the surface. The Berezovsk deposit is considered to be a typical intrusive-related mesothermal vein gold deposit located within the Urals Paleozoic fold belt which is composed of greenstones and granites. The area of ore field consists of both volcanogenic and sedimentary rock. The Saf’anovka copper massive sulfide deposit is located 100 km NE from Ekaterinburg-city. It was discovered in 1985. Explored reserves of ores are 27.5 mt at the average Cu content of 3 %. It is within the East Uralian depression accreted between continental gneiss-schist blocks. The deposit is hosted by the volcaniclastic unit of Devonian age which consists of fluidal clastic lavas, dome breccias, tuffs of tholeiitic dacites, rhyolite-dacite tuffs and siliceous pelites. Intrusive rocks and dykes are rare and are represented by K-diabases, lamprophyres and granodiorites. Massive sulfide ores form a lenticular chain of lens-like bodies from 0,3 to tens of metres thick in wall-rock of metasomatically altered tephroites. The main ores are: copper stringer ore, copper-zinc and copper massive sulfide ores, copper-zinc disseminated ores and ore columns. Massive, banded, breccia-like and colloform fabrics are typical. Ores consist of pyrite, chalcopyrite, sphalerite, tennantite (+tetrahedrite), enargite, pyrrhotite, galena, tellurides, arsenopyrite, native gold.

August 15-17th: Underground tour of Berezovsk giant gold deposits and examination of surface outcrops at the associated Pyshminsko-Kluchevsk copper-cobalt and Shulginsk gold-quartz deposits.

August 18th: Travel by bus to the Saf’anovka mine and examination of geological traverses of ore-hosting volcanogenous units along highway. August 19th: Field trip to visit the Saf’anovka massive sulfide deposit (open pit and outcrops). Drive back to Ekaterinburg.

August 20th: Departure from Ekaterinburg.

Leaders: Howard Colley [ hcolley@brookes.ac.uk ] & Simon Dominy.

Start: Oxford rail station, Tuesday August 16, 1999 at 10am.

End: Oxford rail station, Saturday August 21, 1999 at 5pm.

Cost: £290

The excursion costs cover transportation, hotel accommodation, breakfast and dinner but lunch is not included. The tour will be by minibus, starting and finishing in Oxford. Oxford is easily reached by rail and bus from London and by bus from Heathrow and Gatwick airports. Visits will be made to a number of sites of mineralisation in Wales and will look at geological features and historical aspects of the mining. Most of the sites are no longer actively mined but we do hope to have underground visits at the Gwynfynydd and Ogofau gold mines. Stout footwear and waterproof clothing is essential. The excursion will visit as many as possible of the following localities in the time available: Parys Mountain Cu-Pb-Zn-Ag mine (Anglesey); the Llanrwst Pb-Zn mining field; the Dolegellau gold belt (Coed-y-Brenin porphyry Cu prospect and Gwynfynydd and Clogau Au mines); the Harlech Dome bedded manganese slate; the mid-Wales Pb-Zn mining field; and the Ogofau gold mine.

August 18th-20th 1999

Leader: Dr Jamie Wilkinson [ j.wilkinson@ic.ac.uk ] and Dr Garth Earls

Duration: 3 days. Limit: 16 people. Cost: £180 (excluding any London to Dublin flights, including 3 nights accommodation).

Trip starts and returns to Dublin. The evening of 17th needs to be spent in Dublin as it will be an early start on 18th.

Provisional Itinerary:

18th - Navan: geological talk, underground visit and core examination

19th - Galmoy Deposit: geological talk, underground visit - Lisheen Deposit: geological talk, core examination

20th - Silvermines, outcrop and core examination - Kildare district mineralization.

August 13th - 19th 1999.

Leaders: Peter Sorjonen-Ward [ Peter.Sorjonen-Ward@gsf.fi ] (Geological Survey of Finland) and Par Weihed (Geological Survey of Sweden).

Duration: 7 days. Cost: £600 (excluding flights to and from start and end points)

Starting point: Kuopio, Finland morning of 13th, or Kemi, Finland morning of 15th. End point: Kemi or Rovaniemi, Finland, afternoon of 19th.

A trip commencing from Kuopio on August 13th would emphasize industrial minerals including the late Archaean Siilinjarvi carbonatite, Proterozoic talc, kyanite and soapstone operations, recent reappraisals of the Outokumpu Cu-Zn-Co deposits, a recently delineated kimberlite province and several greenstone-hosted mesothermal gold and nickel deposits, before arriving in Kemi on August 15th. From Kemi, the excursion would continue through Finnish and Swedish Lapland to examine a range of early Proterozoic mafic intrusive complexes, including the Kemi chromite mine, early Proterozoic greenstone-hosted Au and Au-Cu deposits and the Kiruna district, returning to Kemi on August 19th to connect with flights via Helsinki to London.

Leaders: P.Scott, [ pscott@csm.ex.ac.uk ], R.Shail and C.Halls.

Depart London Thursday 26th August (am) travel to Redruth.

Introductory lecture and reception (?) in CSM Museum late pm and evening.

Fieldwork Friday 27 and Saturday 28th August. Fieldwork Sunday 29th August (am). Depart for London (pm) from Redruth.

Cost: £220 each (including Standard Class train fare from London, bed and breakfast for three nights and minibus transport in Cornwall). Lunches and dinner are not included. Minimum 12, maximum 25.

The main features of the Variscan orogeny (metasediments, granites, ophiolite complex) and associated mineralisation (Sn, W, Cu, and others) will be examined, along with the associated china clay (kaolin) deposits.

Leader: H. M. Prichard [ sglhmp@cardiff.ac.uk ].

Duration 4 days. Participants: maximum 27, minimum 18.

Cost:-£255 per person includes travel on Shetland and Hotel accommodation with breakfast and evening meal but does not include travel from London to Shetland or lunches.

Starting point, Lerwick, Shetland at 8am on Friday 27th August.

Travel to Shetland is possible by air on Thursday 26th August or by train to Aberdeen and ferry to Lerwick arriving at 8am on the 27th. End point, Lerwick, Shetland, 3pm on Tuesday 31st August.

The excursion will take place on the most northerly of the Shetland islands on Unst and Fetlar. The itinerary will include the igneous geology of the Shetland ophiolite from mantle through layered dunite, pyroxenite and gabbro, to the dykes in the top of the gabbro. Podiform chromitites in the mantle and overlying crustal sequence will be visited. Sites with platinum-group element (PGE) mineralisation will be examined including the Cliff locality which hosts anomalous total PGE concentrations of 10s of ppm. The underlying melange, and emplacement contact of the ophiolite with the basement, will be seen at several localities revealing the varying development of the contact aureole at different grades up to pyroxene-garnet grade on the Island of Fetlar. The order of visits will depend on tides and weather.

Leaders: Clive Rice [ gmi118@abdn.ac.uk ] (Aberdeen Univ.), Graham Smith (BGS).

Duration: 4 days. Cost/person: Estimate £320. Maximum/Minimum number: 18-12.

Start: 7.30am, 26th August, Imperial College, Exhibition Road, SW7.

End: Mid-evening, 29th August, Imperial College, Exhibition Road, SW7.

Thursday 26 August: Leave London 7.30am. Arrive for dinner Millcroft Hotel, Gairloch, N.W. Scotland. Friday 27 August: Loch Maree Group at Gairloch. Saturday 28 August: Leave Gairloch for Aberfeldy, Perthshire. Foss Baryte Mine. Sunday 29 August: AM. Cononish gold development near Tyndrum (if open); PM. Return to London.

The Proterozoic (c. 2by) Loch Maree Group at Gairloch is a varied group of metagreywackes and metabasalts which overlie Archaean gneiss and are, in turn, overlain by Torridonian sandstones (c. 1by). The group contains a subeconomic volcanogenic massive sulphide (Cu-Zn-Au) deposit, BIFs and Mn-rich sediments. The day will consist of a traverse across the Group examining the diverse rock types (Jones et al., 1987). The Foss baryte mine is the largest baryte producer in the UK and is a major supplier to the N. Sea Oil Industry. The mineralisation is of the SEDEX type and consists of a strongly deformed, high grade, baryte bed about 4m thick, hosted by the Neoproterozoic Ben Eagach Schist Formation. The baryte bed is associated with barium-enriched muscovite schist, quartz-celsian rock and also carries some sulphides. The open pit and underground operation will be visited (Coats et al., 1980). The Cononish gold-silver deposit is the most important precious metal deposit so far discovered in Scotland (Earls et al., 1992). The mineralisation (c. 500,000t @ 10g/t) occurs in the Eas Anie quartz vein and may be of Lower Devonian age. The vein is hosted by Neoproterozoic psammites and pelites. The precious metal phases comprise tellurides, electrum, native gold and silver and these correlate with sulphides which are mainly pyrite, chalcopyrite, sphalerite and galena. This visit depends on the underground workings being open.

Leaders: Fernando Tornos, [ ftaitge@iponet.es ], Juan Locutura (ITGE, Spain) and Luis Martins (IGM, Portugal). Visits are organized in conjunction with the mining companies and research geologists.

Duration: 5 days. Cost per person: £300 (NB. Does not include flights to Madrid or Seville).

Maximum and minimum numbers of participants: 20-8.

Start: Seville, 27 August, 08.00. End: Seville, 31 August, 20.00. The trip will finish in time for trains and flights to Madrid.

This classic field trip includes visits to several representative deposits of the Iberian Pyrite Belt as well as some mineralized sites in the nearby Ossa Morena Zone. The Iberian Pyrite Belt is one of the major ore districts in the world with more than 1700 Mt of volcanic-related massive sulphides, currently worked for pyrite, base metals, tin and gold. However, the geologic setting is rather different from that of the Kuroko, Canadian or Australian metallogenic provinces. The visit will include most of the mines currently operating in the Iberian Pyrite Belt in both Spain and Portugal including the mines of Rio Tinto, Tharsis, Aljustrel, Neves Corvo and Aguas Tenidas as well as some selected outcrops. The Ossa Morena Zone is very different from the Pyrite Belt; only one deposit, the Cala mine, will be visited but outcrops and drill cores of other recently discovered mineralizations will probably be shown.

This preliminary schedule as well as the total cost may be modified depending on how mining operations develop, and the total number of people interested. The cost includes hotels (5 nights, from 26/8 to 30/8), field lunches (5) guidebook and local transport. It does not include travel from London to Seville. There are direct flights between London and Seville or Madrid and a high speed train from Madrid to Seville.

Further information: Fernando Tornos ( ftaitge@iponet.es ) or fax +34-23-265066.

Leaders: J.Naden, (British Geological Survey) [ j.naden@bgs.ac.uk ], Yannis Cheliotis (Institute of Geology and Mineral Exploration, Greece), Stephanos Kilias (University of Athens).

Cost approx.: £850 inclusive of air fares to and from London, accommodation (room only basis) and transport within Greece.

Participants: Minimum 15 , Maximum 20.

Dates: 26th August to 3rd September.

The excursion will be an opportunity to compare epithermal and porphyry mineralisation in the northern Greece with a modern geothermally active analogue -- Milos Island. In northern Greece, planned localities to visit include high-sulphidation epithermal gold, porphyry-Au--PGE and replacement base metal deposits. On Milos Island there will be an opportunity to examine synsedimentary Mn-Ba deposits, low-sulphidation epithermal mineralisation and see the effects of large scale hydrothermal activity.

Flights will be from London to Athens with onward transport (plane or ferry) to Milos (3 days). The excursion will then move to northern Greece (Milos-Athens-Thessaloniki) and visit mineralisation in the Kassandra peninsula (2 days) and Thrace (2 days). Return to London will be via Thessaloniki. Depending on demand, it will be possible to arrange a spare day for people to visit Athens, but this will add an extra day to the trip. For further information and itinerary details contact: Jonathan Naden ( j.naden@bgs.ac.uk ) Fax: +44 (0)115 936-3163.

Start: Tashkent 27 August a.m.; End: Tashkent 3 September a.m.

Maximum number of participants including leaders is 30.

Cost: USD 1000.- including local flight, accommodation and food [not included is the London to Tashkent flight that will be block booked when numbers are known and will be about £450-£550]. The trip is co-sponsored by IGCP, UNESCO, IAGOD and others.

T. Sh. Shayakubov, Honorary Chairman (State Committee for Geology and Mineral Resources, Tashkent, Uzbekistan)

R. Grauch (USGS Denver, USA, Co-leader IGCP-373)

R. Seltmann (GFZ Potsdam, Germany, IGCP-373 Leader)

F. Islamov, B. Isakhodjaev, A. Juraev (Tashkent, Uzbekistan)

A. Kremenetsky (IMGRE Moscow, Russia; Co-leader IGCP-373)

Aug. 27: Arrival of the participants individually or by block-booked flight from London and meeting at the Tashkent airport in the morning. Rest day in Tashkent (breakfast, lunch and dinner); departure for Zarafshan / Kyzyl Kum by plane (Yak40, 20:30 local) and accommodation in a hotel in Zarafshan or in a rest house of the Muruntau Co. (for three nights).

Aug. 28: Bus excursion (about 90 km) to the Daughyz open pit (Au-Ag) and, probably, Vysokovol’tnoe, with return to Zarafshan in the evening; night in hotel in Zarafshan. The Daughyztay ore is classified as of Au-sulfide type. This is a mineralized zone about 2.5 km long and 100 through 450 m thick that comprises en echelon-sited series of orebodies (10-30 by 200-500 m). Mineralization is represented by Au-pyrite-arsenopyrite disseminations. Vertical range of the ore zone is approx. 650 m. The average Au content varies from 5 through 10 ppm.

Aug. 29: Excursion to the Muruntau pit (travel by bus, about 50 km): before lunch – visit of mine and open pit; after lunch – visit to the full cycle gold metallurgy plant. Night in hotel in Zarafshan. The Muruntau ore is classified as of Au-quartz type. This is a giant stockwork formed by quartz veins and veinlets combined with quartz-microcline wall rock metasomatites. Ore zones are hosted by meta-terrigenous carbonaceous sequence of O2-S1 age. The stockwork is a complicated pattern of large sub-vertical ore pipes and low-angle thin (linear) zones. Length of the ore zones varies from 800 to 1350 m at width of up to 750 m; maximum traced depth 1100 m. Contents of sulfides in ore is low; average Au/Ag proportion is 4:1. Average Au content varies from 1 through 29 ppm, Ag 0.8 through 7.2 ppm, WO3 0.003 through 0.6 %.

Aug. 30: Early breakfast and trip (about 5 hours) to Samarkand by bus; lunch and sightseeing visit (3 hours) to the historical city of Samarkand; further bus trip to Tashkent; arrival to Tashkent by 8 p.m. for supper, accommodation in a hotel in Tashkent (Aug. 30 - Sept. 3).

Aug. 31: Bus excursion to Almalyk (the Kalmakyr Cu porphyry open pit), geological introduction lecture and visit to mineralogical museum and Cu metallurgy plant.

Sept. 1: Brief visit to the downtown of Tashkent (where the Independence Day as the national holiday in Uzbekistan will be celebrated); later a scientific conference in the Institute of Mineral Resources (IMR) where local specialists will present reports on major mineral deposits of Uzbekistan.

Sept. 2: Bus excursion to Angren and visit to Kochbulak (a volcanites-hosted Au deposit with Au-rich explosive pipes; open pit and mine); a lecture and a lunch in the Karabau Mts.; return to hotel. Sep. 3: Departure from Tashkent.

Contact address for more detailed information: Dr Reimar Seltmann (Leader of IGCP-373), GeoForschungsZentrum Potsdam (GFZ), Telegrafenberg B223, D-14473 Potsdam, Germany.

e-mail: seltm@gfz-potsdam.de ; phone: +49 331 288-1433, fax: +49 331 288-1436;

http://www.gfz-potsdam.de/pb4/pg3/igcp/welcome.html (further information about IGCP-373).

The SGA has a homepage on INTERNET from which you can get information about scientific meetings in Europe, world wide field trips and workshops, membership application form for the SGA and authors and titles of this year contributions to Mineralium Deposita as well as the electronic edition of SGA News.