Major orogenic gold episode associated with Cordilleran-style tectonics related to the assembly of Paleoproterozoic Australia?
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Research Article| March 01, 2005 Major orogenic gold episode associated with Cordilleran-style tectonics related to the assembly of Paleoproterozoic Australia? A. Kerim Şener; A. Kerim Şener 1Centre for Global Metallogeny, School of Earth and Geographical Sciences, University of Western Australia, Crawley, WA 6009, Australia Search for other works by this author on: GSW Google Scholar Carl Young; Carl Young 1Centre for Global Metallogeny, School of Earth and Geographical Sciences, University of Western Australia, Crawley, WA 6009, Australia Search for other works by this author on: GSW Google Scholar David I. Groves; David I. Groves 1Centre for Global Metallogeny, School of Earth and Geographical Sciences, University of Western Australia, Crawley, WA 6009, Australia Search for other works by this author on: GSW Google Scholar Bryan Krapež; Bryan Krapež 1Centre for Global Metallogeny, School of Earth and Geographical Sciences, University of Western Australia, Crawley, WA 6009, Australia Search for other works by this author on: GSW Google Scholar Ian R. Fletcher Ian R. Fletcher 1Centre for Global Metallogeny, School of Earth and Geographical Sciences, University of Western Australia, Crawley, WA 6009, Australia Search for other works by this author on: GSW Google Scholar Author and Article Information A. Kerim Şener 1Centre for Global Metallogeny, School of Earth and Geographical Sciences, University of Western Australia, Crawley, WA 6009, Australia Carl Young 1Centre for Global Metallogeny, School of Earth and Geographical Sciences, University of Western Australia, Crawley, WA 6009, Australia David I. Groves 1Centre for Global Metallogeny, School of Earth and Geographical Sciences, University of Western Australia, Crawley, WA 6009, Australia Bryan Krapež 1Centre for Global Metallogeny, School of Earth and Geographical Sciences, University of Western Australia, Crawley, WA 6009, Australia Ian R. Fletcher 1Centre for Global Metallogeny, School of Earth and Geographical Sciences, University of Western Australia, Crawley, WA 6009, Australia Publisher: Geological Society of America Received: 14 Jul 2004 Revision Received: 18 Nov 2004 Accepted: 26 Nov 2004 First Online: 02 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2005) 33 (3): 225–228. https://doi.org/10.1130/G21017.1 Article history Received: 14 Jul 2004 Revision Received: 18 Nov 2004 Accepted: 26 Nov 2004 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation A. Kerim Şener, Carl Young, David I. Groves, Bryan Krapež, Ian R. Fletcher; Major orogenic gold episode associated with Cordilleran-style tectonics related to the assembly of Paleoproterozoic Australia?. Geology 2005;; 33 (3): 225–228. doi: https://doi.org/10.1130/G21017.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract New in situ sensitive high-resolution ion-microprobe (SHRIMP) U-Pb analyses of hydrothermal phosphates associated with orogenic gold mineralization in the Paleoproterozoic Ashburton and Pine Creek gold provinces of northern Australia provide ages of ca. 1740 and ca. 1730 Ma, respectively. Argon-argon analyses of gold-related hydrothermal mica from the Tanami gold province of northern Australia provide ages ca. 1730 Ma. It is important to note that late orogenic events across the western half of Australia coincide with gold metallogenesis across this time interval, in several widely separated provinces. Thus, this orogenic gold episode is interpreted to relate to tectonic events during the amalgamation of various continental blocks to form Paleoproterozoic Australia. It is potentially Earth's best-preserved record of orogenic gold formation during a major early Precambrian continental assembly event. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.Keywords:
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We consider the tectonic structure of the eastern part of the Chukotka fold belt, classify the magmatic formations by types of intrusions, and record the basic patterns in distribution of gold and tin-tungsten mineralization. Three structures have been recognized: the Chaun-Iul'tin and Vankarem anticlinal zones and the Amgueroa synclinal zone, complicated by block and linear-folded structures of higher orders. The magmatic formations consist of Early Triassic gabbros, pre-batholithic dikes, and small bodies of diorites, granodiorites, and lamprophyres. Late Jurassic-Early Cretaceous granitoid batholith-like massifs of the Metegyn- Veshkap type. Early Cretaceous granitoid bodies of the Iul'tin, and Late Cretaceous jointed granitoid massifs of the Telekay type Gold within the anticlinal zones displays an association with the batholith-like massifs of the Metegyn-Veshkap type and with the pre-batholithic dikes of intermediate composition. In the Amguema zone, the sources of the gold were apparently intrusive bodies of intermediate composition, associated with the formation of the Ohkotsk-Chukotka volcanic belt. Tin and tin-tungsten deposits of the cassiterite-quartz association, distributed within the anticlinal zones, display an association with granites of the Iul'tin type; tin deposits of the cassiterite-silicate association concentrate mainly toward the Amguema synclinal zone and are associated with granites of the Telekay type. —Authors.
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花敖包特超大型银多金属矿床位于大兴安岭南段,矿体主要呈脉状赋存于二叠系寿山沟组的断裂中,部分矿体呈囊状产于寿山沟组与华力西期蛇绿岩的接触带中。矿体主要包括银铅锌锑矿体、锡铜矿体、铜铅锌矿体、锡矿体和银矿体。花敖包特矿床可划分为4个成矿阶段,分别为石英-锡石-毒砂-黄铁矿阶段(Ⅰ阶段)、石英-绢云母-锡石-黄铜矿-毒砂-磁黄铁矿-闪锌矿-黝铜矿阶段(Ⅱ阶段)、石英-绢云母-萤石-方解石-闪锌矿-方铅矿-黄铁矿-辉锑矿-含银硫盐矿物阶段(Ⅲ阶段)和石英-方解石-黄铁矿-辉银矿-深红银矿阶段(Ⅳ阶段)。对花敖包特矿区2件次流纹岩样品开展了LA-ICP-MS锆石U-Pb定年,分别获得135.4±0.8Ma和134.8±0.8Ma的年龄。对成矿Ⅰ阶段锡矿石和Ⅱ阶段锡铜矿石进行了LA-ICP-MS锡石U-Pb定年,分别获得136.3±2.0Ma和134.3±1.7Ma的加权平均年龄。定年结果表明,花敖包特矿床次流纹岩、锡矿体和锡铜矿体均形成于早白垩世。尽管二者形成时间相近,但脉体穿切关系及矿化分带特征均表明次流纹岩并非成矿物质和成矿流体的主要来源。本文认为,花敖包特矿床真正的成矿地质体为隐伏于矿区深部的次火山岩钟,其矿床成因类型为与次火山岩相关的热液矿床。
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