Search

Your search keyword '"Chi, Guoxiang"' showing total 46 results
Start Over Author "Chi, Guoxiang" Journal ore geology reviews
46 results on '"Chi, Guoxiang"'

36. Yanshanian (Late Mesozoic) ore deposits in China – An introduction to the Special Issue

Author

Sun Weidong, Zhang Yanhua, Chi Guoxiang, Deru Xu, and Zhang Zhaochong

Subjects
geography, geography.geographical_feature_category, 010504 meteorology & atmospheric sciences, Metamorphic rock, Geochemistry, Geology, Orogeny, Crust, 010502 geochemistry & geophysics, 01 natural sciences, Metallogeny, Igneous rock, Paleontology, Craton, Geochemistry and Petrology, Geochronology, Economic Geology, Structural geology, 0105 earth and related environmental sciences
Abstract

The Late Jurassic-Cretaceous Yanshanian Orogeny (or “Yenshan Movement”), one of the most important tectonothermal events, is first recognized in China, especially eastern China. This Late Mesozoic orogeny, which was initiated most likely by a Mesozoic tectonic switch, strongly reworked or destructed the older continental lithospheres or cratonic keels that are manifested by alternating compressive and extensional deformation, voluminous igneous rocks, and a variety of characteristic magmatic-hydrothermal mineral systems. Despite its first discovery and definition in Yenshan-Yinshan area of North China craton, the Yanshanian Orogeny probably is of global tectonic, magmatic and metallogenic significance. However, there have been hot debates on the precise starting time, accurate duration or time-interval, detailed processes and evolution linked to deep lithospheres, tectonic nature, and geodynamic mechanism(s) of the Yanshanian Orogeny, which inevitably have hindered the understanding of the genesis, mineralizing processes and geodynamic mechanism of the Late Mesozoic magmatic-hydrothermal mineral systems. This Special Issue captures some of the latest research results on the Yanshanian ore deposits that are involved into a few main Mesozoic metallogenic belts or provinces, from northeast to southwest China, including: (1) the Jiaodong Peninsula metallogenic province in the North China Craton, (2) the Middle-Lower Yangtze River Valley metallogenic belt in the central eastern China, (3) the Jiangnan and (4) the Nanling metallogenic belts in the South China Block, (5) the southeastern China Coast metallogenic belt, and (6) the Sanjiang metallogenic belt in southwest China. Through a multidisciplinary study, this Special Issue re-investigated and re-evaluated the relationship between the Late Mesozoic magmatic-hydrothermal mineral systems and the Yanshanian tectonothermal events in the studied metallogenic belts or provinces. A few important contributions to the topic in this Special Issue (Yanshanian metallogeny) are summarized as followings: (1) A new ore-deposit type, i.e. the “intracontinental reactivation” type, has been suggested to interpret the genesis of those Au-(polymetallic) deposits that are hosted within older metamorphic rocks and related to the Late Mesozoic basin-and-range extensional settings; (2) Late Mesozoic re-activation of the preexisting structures by the Yanshanian tectono-thermal event(s) might be an important mechanism controlling the Yanshanian large-scale mineralization; (3) A-type granites formed by partial melting of the Mesoproterozoic crust, but with inputs from mantle-derived melt are also favorable for Sn mineralization, in addition to S-type and I-type granites as previously recognized; (4) Calculated oxygen fugacities (ƒO 2 ) of granitic magmas based on chemical compositions of primary biotite have been confirmed to be effective proxy for distinguishing Cu-Au-Mo-W-Sn-Pb-Zn mineralized granites from barren granites; (5) A significant epoch of W–Sn magmatic-hydrothermal ore system at ca. 145–135 Ma has been identified in the southeastern China Coast metallogenic belt; and (6) In addition to traditional structural geology, mineralogy, petrology, geochemistry and geochronology, new analytical techniques (e.g. Cu isotopes) and data treatment method (e.g., Bi-dimensional empirical mode decomposition) can be used to provide more constraints for deep exploration.

Published
2017

37. Multi-stage gold mineralization in the Taldybulak Levoberezhny deposit, Tien Shan, Kyrgyzstan: Reply to comment by Boris Trifonov on “Re–Os pyrite and U–Pb zircon geochronology from the Taldybulak Levoberezhny gold deposit: Insight for Cambrian metallogeny of the Kyrgyz northern Tien Shan”

Author

Zhao, Xiaobo, primary, Xue, Chunji, additional, Chi, Guoxiang, additional, Chu, Haixia, additional, Li, Zenghua, additional, Pak, Nikolay, additional, Wang, Xinli, additional, Zhang, Guozhen, additional, and Zu, Bo, additional

Published
2017
Full Text
View/download PDF

40. Geology, geochronology and geochemistry of granitic intrusions and the related ores at the Hongshan Cu-polymetallic deposit: Insights into the Late Cretaceous post-collisional porphyry-related mineralization systems in the southern Yidun arc, SW China

Author

Zu, Bo, primary, Xue, Chunji, additional, Chi, Guoxiang, additional, Zhao, Xiaobo, additional, Li, Chao, additional, Zhao, Yun, additional, Yalikun, Yaxiaer, additional, Zhang, Guozhen, additional, and Zhao, Yi, additional

Published
2016
Full Text
View/download PDF

46. Epithermal Au and polymetallic mineralization in the Tulasu Basin, western Tianshan, NW China: Potential for the discovery of porphyry Cu Au deposits.

Author

Zhao, Xiaobo, Xue, Chunji, Chi, Guoxiang, Wang, Honggang, and Qi, Tianjiao

Subjects
*GOLD ores, *COPPER ores, *GEOLOGICAL time scales, *GEOCHEMISTRY, *DEVONIAN Period
Abstract

Abstract: The Tulasu basin is an important epithermal Au mineralization district in western Tianshan in northwestern China. Geochemical and geochronological studies of the volcanic host rocks (the Dahalajunshan Formation) and associated intrusive rocks, particularly the enrichment of large-ion lithophile elements and depletion of high field strength elements, suggest that the Tulasu basin was located in a magmatic-arc setting from Late-Devonian to Early-Carboniferous, associated with the southward subduction of the North Tianshan Ocean beneath the Kazakhstan–Yili plate. Geologic and geochemical characteristics of the Au Cu–polymetallic deposits in the Tulasu basin suggest that the mineralization is related to the Late-Devonian to Early-Carboniferous arc magmatism, and is mainly of epithermal nature, including both the adularia–sericite type (Axi, Tawuerbieke and Tabei) and alunite–kaolinite or acid–sulfate type (Jingxi–Yelmend and Tieliekesayi). However, some evidence of porphyry-type mineralization has also been found, including the presence of mineralized porphyry enclaves in volcanic rocks hosting the Tawuerbieke Au prospect, and the development of porphyry-style Cu mineralization overprinted by vein-type mineralization at Kexiaxi. Considering the magmatic-arc setting that is favorable for both epithermal and porphyry types of mineralization, and the development of such mineralization systems in other parts of western Tianshan and the Altaid Belt (e.g., Uzbekistan, Kazakhstan and Kyrgyzstan), we suggest that major porphyry Cu Au deposits may have been developed in the Tulasu basin, probably beneath or adjacent to known epithermal Au mineralization. [Copyright &y& Elsevier]

Published
2014
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results