Geology and geochronology of the Jinmuguo Mo polymetallic deposit: Implications for the metallogeny of the Bangongco- Nujiang belt of Tibet

Lin, Bin; Zhang, Xiangguo; Tang, Pan; Wang, Liqiang; Santosh, M.; Xi, Zha; Zhang, Xiaoxu; Qi, Jing; He, Lijuan

doi:10.1016/j.oregeorev.2021.104460

Cited by 11 publications

(9 citation statements)

References 52 publications

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“…As presented previously, the BNMB includes a subduction-accretionary complex, migrated magmatic arcs, major listric faults, large or basement-cored anticlines, deformed rigid basement blocks, and volcano-tectonic basins on both the northern margin of the Lhasa Terrane and the southern margin of the Qiangtang Terrane in the northern Tibetan Plateau (Song et al, 2014;Lin et al, 2021). Therefore, the definition of the BNMB involves the deposits on both sides of the BNSZ that have been recognized as products of subduction or post-subduction lithospheric extension, including the southern edge of the SQB, the BNSZ, and parts of the NLB and CLB.…”

Section: Relationship With Tectonic Evolutionmentioning

confidence: 95%

“…Therefore, the definition of the BNMB involves the deposits on both sides of the BNSZ that have been recognized as products of subduction or post-subduction lithospheric extension, including the southern edge of the SQB, the BNSZ, and parts of the NLB and CLB. Lin et al (2021) comprehensively summarized the metallogeny of the BNMB and divided the BNMB into the western (west of 86 °E), central (86 °E to 94 °E), and eastern (east of 94 °E) regions, which represent different mineralization systems. They suggested that the mineralization of the BNMB may extend to the Yunnan province.…”

Section: Relationship With Tectonic Evolutionmentioning

confidence: 99%

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Metallogeny in the Bangong–Nujiang belt, central Tibet, China: A review

et al. 2023

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The Bangong–Nujiang metallogenic belt consists of scattered Tethyan oceanic blocks, mainly distributed underneath the margins of the Qiangtang and Lhasa terranes in central Tibet. A new world-class metallogenic belt has been reported in this region recently, based on the geological mapping and ore deposit prospecting over the last two decades. It currently comprises inferred resources of 30 Mt Cu and 500 t Au, together with several Cr–Ni, Fe, and W (Mo) resources, forming a significant potential area for future mineral exploration. These metals are mainly hosted in porphyry copper, skarn copper, skarn iron, orogenic gold, quartz-vein tungsten, and ophitic chromite deposits. The mineral deposits in the Bangong–Nujiang metallogenic belt have been widely recognized in different localities, including the southern edge of the southern Qiangtang block, part of the north Lhasa block, and even part of the central Lhasa block, indicating they were formed in variable geological settings, from the initial opening, subduction, and collision to the extension of the Bangong–Nujiang Ocean. Specifically, five major tectonic events contributed to mineralization, including the stage 1 (240–165 Ma) initial opening of the Bangong–Nujiang Ocean, stage 2 (165–145 Ma) oceanic subduction, stage 3 (145–100 Ma) close of the ocean, stage 4 (100–65 Ma) continent–continent collisional orogenesis, and stage 5 (65–0 Ma) post-orogenesis. At stage 1, Cr–Ni deposits were formed during the initial opening of the ocean; porphyry–epithermal Cu (Au), skarn Fe, and minor orogenic Au deposits were formed at stage 2 and stage 3; a younger pulse of a few porphyry–skarn Cu ± Mo and orogenic Au deposits were formed during stage 4; finally, W(Mo) deposits were generated in stage 5. In general, porphyry Cu systems, orogenic Au, and skarn Cu polymetallic deposits that occurred in the subduction and post-collision settings related W(Mo) deposits have the most potential for future exploration. An in-depth investigation of several scientific problems, such as addressing the tectonic setting, magmatism, and metallogeny of this region and genetic linkage of these deposit preservations to plateau uplift, is essential for the future success of exploration in the Bangong–Nujiang metallogenic belt.

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Section: Relationship With Tectonic Evolutionmentioning

confidence: 95%

Section: Relationship With Tectonic Evolutionmentioning

confidence: 99%

Metallogeny in the Bangong–Nujiang belt, central Tibet, China: A review

et al. 2023

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“…The Jiama porphyry copper deposit, located in Jiama Town, Mozhugongka County, Lhasa City, Tibet Autonomous Region, China (Fig. 1a), is part of the Miocene Gangdese porphyry copper belt in the Himalayan Tethyan metallogenic domain (Lin et al, 2019(Lin et al, , 2021(Lin et al, , 2022. Geotectonically, it is situated in the eastern portion of the Gangdese volcanic-magmatic arc-a secondary tectonic unit of the Lhasa terrane on the southern Qinghai-Tibet Plateau (Qin et al, 2014).…”

Section: Geological Settingmentioning

confidence: 99%

“…The Gangdese metallogenic belt, recognized as a significant porphyry copper-molybdenum metallogenic belt, has shown considerable potential with notable recent discoveries (Lin et al, 2017(Lin et al, , 2019(Lin et al, , 2021Zhang et al, 2022). This Miocene porphyry copper belt lies north of the Yarlung Zangbo suture zone, spanning over 300 km westeast and extending 500 km north-south along the southern margin of the Lhasa terrane (Hou et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

“…The region is dotted with porphyry-skarn deposits, including Zhu'nuo, Chongjiang, Tinggong, Bairong, Gangjiang, Dabu, Lakange, Qulong, Jiama, Demingding, Chuibaizi, and Tangbula, aligned from west to east (Lin et al, 2017). The Jiama porphyry (skarn) copper deposit, positioned in the east-central part of the Gangdese belt, is among Tibet's most significant in terms of reserves, with approximately 11 million tons of copper reserves having been identified (Lin et al, 2021). Extensive studies have been conducted by both domestic and foreign scholars on its geological traits (Lin et al, 2012(Lin et al, , 2024Tang et al, 2010Tang et al, , 2011Tang et al, , 2013, metallogenic epochs (Qin, 2013;Ying et al, 2009Ying et al, , 2010, lithogeochemistry (Zhang et al, 2019;Qi et al, 2023), and the metallogenic model, regularity, and environment (Yang, 2020;Yang et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

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Mineral Geochemistry of Apatite in the Jiama Porphyry‐Skarn Deposit, Tibet and its Geological Significance

YANG,

TANG,

ZHANG

et al. 2024

Acta Geologica Sinica (Eng)

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The Jiama deposit, a significant porphyry‐skarn‐type copper polymetallic deposit located within the Gangdese metallogenic belt in Tibet, China, exemplifies a typical porphyry metallogenic system. However, the mineral chemistry of its accessory minerals remains under‐examined, posing challenges for resource assessment and ore prospecting. Utilizing electron microprobe analysis and LA‐ICP‐MS analysis, this study investigated the geochemical characteristics of apatite in ore‐bearing granite and monzogranite porphyries, as well as granodiorite, quartz diorite, and dark diorite porphyries in the deposit. It also delved into the diagenetic and metallogenic information from these geochemical signatures. Key findings include: (1) The SiO2 content, rare earth element (REE) contents, and REE partition coefficients of apatite indicate that the dark diorite porphyry possibly does not share a cogenetic magma source with the other four types of porphyries; (2) The volatile F and Cl contents in apatite, along with their ratio, indicate the Jiama deposit, formed in a collisional setting, demonstrates lower Cl/F ratios in apatite than the same type of deposits formed in a subduction environment; (3) Compared to non‐ore‐bearing rock bodies in other deposits formed in a collisional setting, apatite in the Jiama deposit exhibits lower Ce and Ga contents. This might indicate that rock bodies in the Jiama deposit have higher oxygen fugacity. Nevertheless, the marginal variation in oxygen fugacity between ore‐bearing and non‐ore‐bearing rock bodies within the deposit suggests oxygen fugacity may not serve as the decisive factor in the ore‐hosting potential of rock bodies in the Jiama deposit.

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