| Citation: |
Ju-xing Tang, Huan-huan Yang, Yang Song, Li-qiang Wang, Zhi-bo Liu, Bao-long Li, Bin Lin, Bo Peng, Gen-hou Wang, Qing-gao Zeng, Qin Wang, Wei Chen, Nan Wang, Zhi-jun Li, Yu-bin Li, Yan-bo Li, Hai-feng Li, Chuan-yang Lei, 2021. The copper polymetallic deposits and resource potential in the Tibet Plateau, China Geology, 4, 1-16. doi: 10.31035/cg2021016
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The copper polymetallic deposits and resource potential in the Tibet Plateau
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Abstract
Many large and super-large copper deposits have been discovered and explored in the Tibet Plateau, which makes it the most important copper resource reserve and development base in China. Based on the work of the research team, the paper summarizes the geological characteristics of the main copper deposits in Tibet and puts forward a further prospecting direction. A series of large accumulated metal deposits or ore districts from subduction of Tethys oceanic crust to India-Asia collisionhave been discovered, such as Duolong Cu (Au) ore district and Jiama copper polymetallic deposit. The ore deposits in the Duolong ore district are located in the lowstand domain, the top of lowstand domain, and the highstand domain of the same magmatic-hydrothermal metallogenic system, and their relative positions are the indicators for related deposits in the Bangong Co-Nujiang metallogenic belt. The polycentric metallogenic model of the Jiama copper polymetallic deposit is an important inspiration for the exploration of the porphyry mineralization related to collision orogeny. Further mineral exploration in the Tibet Plateau should be focused on the continental volcanic rocks related to porphyry-epithermal deposits, orogenic gold deposits, hydrothermal Pb-Zn deposits related to nappe structures, skarn Cu (Au) and polymetallic deposits, and the Miocene W-Sn polymetallic deposits.
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References
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Ju-xing Tang, Huan-huan Yang, Yang Song, Li-qiang Wang, Zhi-bo Liu, Bao-long Li, Bin Lin, Bo Peng, Gen-hou Wang, Qing-gao Zeng, Qin Wang, Wei Chen, Nan Wang, Zhi-jun Li, Yu-bin Li, Yan-bo Li, Hai-feng Li, Chuan-yang Lei, 2021. The copper polymetallic deposits and resource potential in the Tibet Plateau, China Geology, 4, 1-16. doi: 10.31035/cg2021016
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Figure 1.
Geological map of the Qinghai-Tibetan Plateau, showing the locations of the major metallogenic belts and the main ore deposits (modified from Tang JX et al., 2017). JSSZ‒Jinshajiang suture zone; BNS‒Bangong Co-Nujiang suture zone; SNMZ‒Shiquan River-Nam Tso melange zone; YZS‒Yarlung Zangbo suture zone; SJMB‒Jinshajiang metallogenic belt; BNMB‒Bangong Co-Nujiang metallogenic belt; GDMB‒Gangdese metallogenic belt; NHMB‒North Himalayan metallogenic belt; yellow dot‒ Mesozoic ore deposits; green dot‒Cenozoic ore deposit.
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Figure 2.
Geological map of the Duolong mining district (a) and the profile of drill holes in the Tiegelongnan deposits (b) (modified from Wang Q et al., 2015; Lin B et al., 2018b).
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Figure 3.
Simplified cross-section through the Naruo porphyry-breccia Cu deposit (after Lin B et al., 2018a).
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Figure 4.
Geological map of the Jiama mining area (modified from Lin B et al., 2019b). 1‒Quaternary sedimentary rocks; 2‒sandstone, slate, and hornfels of Linbuzong Formation in lower Cretaceous; 3‒limestone and marble of Duodigou Formation in upper Jurassic; 4‒skarn marble; 5‒skarn; 6‒skarn ore-body; 7‒granite porphyry veins; 8‒granodiorite porphyry veins; 9‒quartz-diorite porphyry veins; 10‒slip fault; 11‒the segment of mining; 12‒drilling and number.
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Figure 5.
Schematic diagram of comprehensive exploration model in the Xiongcun mining area (after Lang XH et al., 2017).
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Figure 6.
Alteration distribution along representative section of the Qulong deposit (modified from Yang ZM et al., 2008).
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Figure 7.
Regional metallogenic model in Duolong district and inheritance of deposits (modified from Wang Q et al., 2019).
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Figure 8.
Polycentric mineralization model of Jiama deposit (modified from Lin B et al., 2019b).1‒sandstone and slate in Linbuzong Formation; 2‒limestone and marble in Duodigou Formation; 3‒upper magma chamber; 4‒granodiorite porphyry; 5‒monzonitic granite porphyry; 6‒granite porphyry; 7‒breccias; 8‒proximal sharn; 9‒intermediate skarn; 10‒distal skarn; 11‒potassic-silicate alteration; 12‒chlorite-epidote alteration; 13‒phyllic and argillic alteration; 14‒hornfel alteration; 15‒strong silicic alteration; 16‒boundary of ore-body; 17‒fissure system; 18‒thrust and slip faults; HS‒High sulphidation epithermal deposit; LH‒Low sulphidation epithermal deposit.