{"id":1227,"date":"2018-09-20T15:43:22","date_gmt":"2018-09-20T14:43:22","guid":{"rendered":"http:\/\/sga.cuni.cz\/?p=1227"},"modified":"2020-04-14T10:16:49","modified_gmt":"2020-04-14T09:16:49","slug":"report-from-the-gold-short-course-2018-led-by-prof-david-i-groves-post-course-field-trip-in-bohemian-massif","status":"publish","type":"post","link":"https:\/\/sga.cuni.cz\/?p=1227","title":{"rendered":"Report from the Gold Short Course 2018 (led by Prof. David. I. Groves) + post-course field trip in Bohemian Massif"},"content":{"rendered":"\n

Report\nfrom the Gold Short Course 2018 (led by Prof. David. I. Groves) +\npost-course field trip in Bohemian Massif <\/strong>\n<\/p>\n\n\n\n

Jan\nKulh\u00e1nek, Marek Tuh\u00fd, Dominik Br\u00e9m, Rafael Baieta<\/p>\n\n\n\n

SGA Student Chapter Prague, Faculty of Science, Charles University, Albertov 6, 128 43 Prague 2, Czech Republic; jan.kulhanek@natur.cuni.cz<\/em><\/p>\n\n\n\n

Photos album links:
Gold short-course: https:\/\/www.zonerama.com\/SGA-Prague\/Album\/4347282<\/a>
Post-Gold course Field trip: https:\/\/www.zonerama.com\/SGA-Prague\/583718<\/a><\/p>\n\n\n\n

Short\nCourse<\/p>\n\n\n\n

During\n19\u201320th<\/sup>\nof May 2018 the SGA Student Chapter Prague organized the Gold Short\nCourse led by Prof. David I. Groves from the Centre for Exploration\nTargeting, UWA, Australia. There was an icebreaker organised in the\nChlup\u00e1\u010d’s Museum of Earth History in the Faculty of Science, which\nwas a great opportunity to experience this newly established\nexposition with a glass of wine (Fig. 1). This event also took place\nin the Faculty of Science, Charles University, Prague, Czech\nRepublic, where 77 participants from 13 countries and 6 SGA Student\nChapters came to attend lectures by Prof. Groves (Fig. 2, 3). \n<\/p>\n\n\n\n

David\nI. Groves is an Emeritus Professor at the University of Western\nAustralia (UWA). He is considered to be a world leader in the\nresearch of ore deposits, particularly orogenic gold and IOCG\ndeposits, and global metallogeny. On the UWA, he helped to establish\nthe Centre for Exploration Targeting. He has authored\nand\/or co-authored more than 500 publications, mainly in the fields\nof Archean evolution, komatiite-associated Ni-Cu deposits, orogenic\ngold deposits, the role of lithosphere in global metallogeny, and\nprospection mapping. He was elected President of the SGA, SEG and the\nGeological Society of Australia, and for his outstanding achievements\nduring his career, he received both the SGA Newmont Gold Medal and\nthe SEG Penrose Gold Medal. \n<\/p>\n\n\n\n

Each\nday of the short course was focused on different topics within 4\nlectures: \n<\/p>\n\n\n\n

1st<\/sup>\nday \u2013 Orogenic gold deposits:<\/p>\n\n\n\n

\t1st<\/sup>\nlecture: Introduction to orogenic gold<\/p>\n\n\n\n

\t2nd<\/sup>\nlecture: The crustal continuum and genetic models for orogenic gold<\/p>\n\n\n\n

\t3rd<\/sup>\nlecture: Critical factors controlling the formation of orogenic gold<\/p>\n\n\n\n

\t4th<\/sup>\nlecture: Exploration targeting for orogenic gold<\/p>\n\n\n\n

2nd<\/sup>\nday \u2013 Gold deposits on craton margins:<\/p>\n\n\n\n

\t5th<\/sup>\nlecture: Introduction to intrusion-related gold deposits (IRGDs)<\/p>\n\n\n\n

\t6th<\/sup>\nlecture: Nature of hybrid magmas and genesis of IRGDs<\/p>\n\n\n\n

\t7th<\/sup>\nlecture: Carlin-type gold deposits of Nevada and China<\/p>\n\n\n\n

\t8th<\/sup>\nlecture: Iron-oxide copper-gold deposits: nature and genesis<\/p>\n\n\n\n

SGA\nStudent Chapter Prague is grateful and would like to thank Prof.\nGroves for leading this short course and we would also like to thank\nall our sponsors who supported us during the organization of this\nevent. Especially the SGA Educational Fund for the financial support\nand the bakery Kab\u00e1t, butchery G\u00f6ergl, company Vitana and brewery\nStaropramen for their excellent catering (Fig. 4).<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n


Fig.\n1: Ice-breaker visits of Chlup\u00e1\u010d’s Museum of Earth History. Photo\nby V. Santol\u00edk.<\/em><\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n


Fig.\n2: Ongoing lecture by Prof. Groves. Photo by V. Santol\u00edk.<\/em><\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Fig.\n3: Group photo of all participants by V. Santol\u00edk.<\/em><\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n


Fig.\n4: Food provider Michal \u010curda with refreshments and sponsors logo.\nPhoto by M. Tuh\u00fd.<\/em><\/p>\n\n\n\n

Field\ntrip<\/p>\n\n\n\n

The\npost-course field trip took place during 21\u201323rd<\/sup>\nof May 2018 to various deposits in the Bohemian Massif. On this trip\nparticipated 14 SGA members, besides the Prague Chapter\u2019s members\nalso the Baltic, Black Forest and Moroccan members + SGA members\nwithout chapter.<\/p>\n\n\n\n

1st<\/sup>\nday<\/p>\n\n\n\n

We\nvisited the J\u00edlov\u00e9 gold district, which is characterized by three\nmain types of gold-bearing ore bodies differing in morphology: ore\nveins representing the main type of mineralization mined in the past,\ngold-bearing stockworks representing the type of mineralization of\ngreatest economic importance and stockworks of irregular shapes\npassing into impregnation zones which are developed at the eastern\nmargin of the albite granite body between the \u0160loj\u00ed\u0159 and Kocoury\nvein zones, forming the Klob\u00e1sy ore zone in the southern part of the\nJ\u00edlov\u00e9 district (Pep\u0159 mine). Firstly, we have visited two\nhistorical galeries, St. A. Padu\u00e1n (Fig. 5) and St. Josef gallery,\nwhere it was possible to see historical styles of mining. Afterwards\nwe moved to the more recent Pep\u0159 mine with V\u00e1clav gallery which was\nfinished during the second half of 19th century when the underground\nexploration of the southern part of the J\u00edlov\u00e9 district occurred.\nSince 2012, this mine is under control of the Montanika society, who\nis removing the obstacles and taking care of the mine and to whom we\nwould like to thank for an excellent visit, especially to the leader\nof this mine-tour Dr. Pavel \u0160k\u00e1cha (Fig. 6).<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n


Fig.\n5: Historical gallery St. A. Padu\u00e1n. Photo by L. Kyrc.<\/em><\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n


Fig.\n6: Introduction speech by Dr. \u0160k\u00e1cha in front of V\u00e1clav gallery.\nPhoto by L. Kyrc.<\/em><\/p>\n\n\n\n

2nd<\/sup>\nday<\/p>\n\n\n\n

We\nmoved to the Kru\u0161n\u00e9 hory Mts. on the NW part of the Czech Republic\nand, in the morning, we visited the historical town J\u00e1chymov, which\nis an old well-known mining district operating since 1511. In the\nbeginning, silver was mined in secondary cementation zones and in\n1519, the first \u0160lik\u2019s Thaler was minted. This name was then\ntransformed into the currency dollar. During the 16th<\/sup>\ncentury, 350 tons of silver were obtained. In the 19th<\/sup>\ncentury, this was the deepest mine in the world (665 m). After the\ndiscovery of uranium,local mines produced high quantities of this\nelement and it was used mainly for glass and ceramics coloring. After\nthe discovery of radium and upcoming radium rush, the first radium\nspa was established (1906) which is still in operation. Because of\nthis, Svornost mine, is still operating and pumping the radioactive\nwaters used for healing treatments (Fig. 7). J\u00e1chymov ore district\nis a typical example of the five-element formation Ag-Co-Ni-Bi-As and\nU-formation formed as a medium temperate vein hydrothermal deposit in\nthe Czech part of the Kru\u0161n\u00e9 hory Mts. (Erzgebirge). Up to 430\nminerals, both primary and supergene, have been discovered and\ndescribed in J\u00e1chymov up to now (latest figure counted by J. Pl\u00e1\u0161il\nin February 2011). After the mine tour, we also visited a local\nmuseum with a beautiful mineralogical collection from this area and\nwith historical insight to the J\u00e1chymov town.<\/p>\n\n\n\n

The\nnext stop was the historical mine Mauritius (Fig. 9) located near the\ntown Horn\u00ed Blatn\u00e1, which has been an important mining center for\nthe past several centuries, mainly for tin, and secondly for silver,\niron, cobalt and later manganese ores. The mine was closed in 1944\nand today provides well preserved historical galleries mined from the\nend of 16th century. The occurrences of tin ores are bound to the\nbiotitic granites of the Blatn\u00e1 massif that build the wider\nneighborhood of the Blaten Hill. The granites are greisenized and\nenriched with mica, tourmaline, quartz, chlorite and especially\ncassiterite. \n<\/p>\n\n\n\n

Close\nto the borders with Germany, we visited a skarn deposit called Zlat\u00fd\nKopec, which is a lens-shaped body of diopside- and\ndiopside-actinolite skarn in a chlorite-sericite phyllites complex.\nOre minerals are cassiterite, sphalerite, chalcopyrite, and\nmagnetite, which we had the opportunity to collect on the heaps near\nthe gallery Johannes.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n


Fig.\n7: Taking bath in warm radioactive spring B\u011bhounek directly in\nSvornost mine more than 500 m below the surface level. Photo by L.\nKyrc.<\/em><\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n


Fig.\n8: Group photo in front of Svornost mine. Photo by L. Kyrc.<\/em><\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n


Fig.\n9: Introduction talk in Mauritius mine. Photo by L. Kyrc.<\/em><\/p>\n\n\n\n

3rd<\/sup>\nday<\/p>\n\n\n\n

On\nthe last day, we firstly visited an open-pit mine and processing of\ngem-quality pyropes, which are famous under the name \u201cCzech\ngarnet\u201d. Czech garnet separating plant and the open-pit mine (Fig.\n10), called Pansk\u00e9 j\u00e1my, are situated close to the Podsedice\nvillage in the \u010cesk\u00e9 St\u0159edoho\u0159\u00ed area (Central Bohemian Uplands \u2013\na neovolcanic field on the north of Czech Republic). There are\napproved reserves with a garnet content of about 40 g\/m3<\/sup>.\nGarnets are mined easily by excavators from alluvial sediments, but\noriginally, garnets come from near volcanic spots (diatremes), whose\nbreccia filler contains blocks of serpentinized peridotite rich in\nthose garnets. After separating garnets with the proper size and\nquality, they are sent for cutting and are used in the famous\njewellery made by the company Gran\u00e1t Turnov.<\/p>\n\n\n\n

After\nthe garnets, we moved to the northern part of Kru\u0161n\u00e9 hory Mts.,\nwhere we visited Krupka town surroundings in one of the youngest\nmining districts in this area named Kn\u00f6ttel (Bohosudov) situated on\nthe east of Krupka area. The underground mining in this region,\nstarted in the 18th<\/sup>\ncentury. The deposit was formed in gneisses and was mainly exploited\nfor tin and molybdenum mineralization. We started our tour close to\nthe Barbora gallery, one of the molybdenum mine galleries exploited\nduring World War 2. Then, we stopped near Siebenschl\u00e4fer, a modern\ngallery with tin, copper and bismuth mineralization mined mainly for\ncassiterite. Next stop was on an old heap with high contents of\nnative bismuth accompanied by chalcopyrite (Fig. 11). Another nearby\nstop was the Zwickenpinge, an open-pit with small shafts and heap\nwith secondary copper mineralization and the first place of surface\nmining of tin and copper ores originated in 13th<\/sup>\ncentury. We also visited an open-pit above Prokop gallery, molybdenum\nmine with quartz body and greisen vein with occurrences of\nmolybdenite, fluorite, topaz etc. The last stop was at the place\nwhere the quartz vein called Luk\u00e1\u0161 surfaces and where it was\npossible to find samples of green apatite crystals up to 1 cm,\ntin-rich mica zinnwaldite and some fluorite crystals.<\/p>\n\n\n\n

\nFinally, we would like to thank\nall the leaders of the separate trips, especially to Dr. Pavel \u0160k\u00e1cha\nfrom the Pep\u0159 mine in J\u00edlov\u00e9 district and Dr. Jakub Pl\u00e1\u0161il and\nDr. Viktor Goli\u00e1\u0161 for leading the trips to Svornost mine in\nJ\u00e1chymov. Special thanks to the Svornost mine and company Gran\u00e1t\nTurnov for allowing us to explore their mines and also to all the\nsponsors mentioned above.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n


Fig.\n10: Collecting of small gem-quality pyropes in the open-pit mine near\nPodsedice village. System of cascades for cleaning processing waters.\nPhoto by J. Myslive\u010dek.<\/em><\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n


Fig.\n11: Collecting samples on the heap rich on native bismuth. Photo by\nJ. Myslive\u010dek.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

Report from the Gold Short Course 2018 (led by Prof. David. I. Groves) + post-course field trip in Bohemian Massif Jan Kulh\u00e1nek, Marek Tuh\u00fd, Dominik Br\u00e9m, Rafael Baieta SGA Student Chapter Prague, Faculty of Science, Charles University, Albertov 6, 128 43 Prague 2, Czech Republic; jan.kulhanek@natur.cuni.cz Photos album links: Gold \u2026 Continue reading → <\/span><\/a><\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[3,9,4,7],"tags":[],"class_list":["post-1227","post","type-post","status-publish","format-standard","hentry","category-events","category-lectures","category-our-activities","category-significant-chapter-events"],"_links":{"self":[{"href":"https:\/\/sga.cuni.cz\/index.php?rest_route=\/wp\/v2\/posts\/1227","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sga.cuni.cz\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sga.cuni.cz\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sga.cuni.cz\/index.php?rest_route=\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/sga.cuni.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1227"}],"version-history":[{"count":2,"href":"https:\/\/sga.cuni.cz\/index.php?rest_route=\/wp\/v2\/posts\/1227\/revisions"}],"predecessor-version":[{"id":1258,"href":"https:\/\/sga.cuni.cz\/index.php?rest_route=\/wp\/v2\/posts\/1227\/revisions\/1258"}],"wp:attachment":[{"href":"https:\/\/sga.cuni.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1227"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sga.cuni.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1227"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sga.cuni.cz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1227"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}