Zengqian Hou

Chinese Academy of Geological Sciences

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Zhusen Yang

Chinese Academy of Geological Sciences

Zhiming Yang

Chinese Academy of Geological Sciences

Hongrui Zhang

Chinese Academy of Geological Sciences

Yuanchuan Zheng

China University of Geosciences (Beijing)

Xuanxue Mo

China University of Geosciences (Beijing)

Bo Xu

China University of Geosciences (Beijing)

Shihong Tian

East China University of Technology

Guochen Dong

China University of Geosciences (Beijing)

Yingchao Liu

Chinese Academy of Geological Sciences

Peng Chai

Chinese Academy of Geological Sciences

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Chinese Academy of Geological Sciences

110

China University of Geosciences (Beijing)

108

Chinese Academy of Sciences

Ministry of Natural Resources

China Geological Survey

China University of Geosciences

Mineral Resources

University of Chinese Academy of Sciences

Beijing Institute of Geology for Mineral Resources

Peking University

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Basic Characteristics and Evolution of Sanjiang Tethys Archipelagic Arc-Basin System

The China Geological Survey Series (2023)

Wenchang Li Guitang Pan Zengqian Hou Xuanxue Mo Liquan Wang

The rise of plate tectonics theory in the 1960s contributed to a revival of the long-neglected idea of continental drift, and revolutionized Earth sciences by shifting people's perception that continents were fixed to a belief that they were in a constant state of motion.

Archipelagic state

Continental drift

10.1007/978-981-99-3652-6_2

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Citations (0)

Geodynamic relationships between large-scale copper mineralization and rapid crustal uplifting in the Gangdese collisional orogen, southern Tibet

Springer eBooks (2005)

Xiaoming Qu Zengqian Hou Wenyi Xu

Adakite

10.1007/3-540-27946-6_321

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Citations (1)

Relationship of the Cenozoic Beiya Cu-Au mineralization to alkali-rich porphyries in western Yunnan, China

Springer eBooks (2005)

Zeng Pusheng Zengqian Hou Xuanxue Mo Weiguang Yang Wenchang Li

10.1007/3-540-27946-6_326

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Petrogenesis of Eocene Wangdui adakitic pluton in the western Gangdese belt, southern Tibet: implications for crustal thickening

Geological Magazine (2022)

Chang‐da Wu Yuanchuan Zheng Zengqian Hou Peiyan Xu Lin-yuan Zhang

Abstract Lower-crust-derived adakitic rocks in the Gangdese belt provide important constraints on the timing of Tibetan crustal thickening and on the relative contributions of magmatic and tectonic processes. Here we present geochronological and geochemical data for the Wangdui porphyritic monzogranites in the western Gangdese belt. Zircon U–Pb dating yields emplacement ages of 46–44 Ma. All samples have high Sr (321–599 ppm), low Yb (0.76–1.33 ppm) and Y (10.6–18.3 ppm) contents, with high La/Yb (51.1–72.3) and Sr/Y (21.0–51.4) ratios, indicating adakitic affinities. The low MgO (0.97–1.76 wt %), Cr (7.49–53.6 ppm) and Ni (4.75–29.1 ppm) contents, as well as high 87 Sr/ 86 Sr (i) (0.7143–0.7145), low ϵ Nd ( t ) (−10.4 to −9.8) and zircon ϵ Hf ( t ) (−17.7 to 0.4) values, suggest that the Wangdui pluton most likely originated from partial melting of the thickened ancient lower crust. In combination with previously published data, despite the east–west-trending heterogeneity of crustal composition in the Gangdese belt, the La/Yb ratios of magmatic rocks reveal that both western and eastern segments experienced remarkable crustal thickening in the Eocene. However, in contrast to the thickened juvenile lower crust in the eastern segment formed by the underplating of mantle-derived magmas, tectonic shortening plays a more crucial role in thickening of the ancient basement in western Gangdese. In fact, such Eocene-thickened ancient lower-crust-derived adakitic rocks are widely distributed in the central Himalayan–Tibetan orogen. This, together with the extensive development of fold–thrust belts, suggests that tectonic shortening might be the main mechanism accounting for the crustal thickening associated with the India–Asia collision.

Underplating

Porphyritic

Batholith

Petrogenesis

Adakite

10.1017/s0016756822000206

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Citations (3)

Tennantite-(Ni), Cu₆(Cu₄Ni₂)As₄S₁₃, from Luobusa ophiolite, Tibet, China: a new Ni member of the tetrahedrite group

Mineralogical Magazine (2023)

Yanjuan Wang Rujun Chen Xiangping Gu Zengqian Hou Fabrizio Nestola

Abstract The new mineral tennantite-(Ni), Cu 6 (Cu 4 Ni 2 )As 4 S 13 , has been discovered from the Luobusa Chromitite, Tibet, southwestern China. Tennantite-(Ni) occurs as anhedral grains ranging from 2 to 20 μm in size. In reflected light microscopy, tennantite-(Ni) is isotropic and appears yellow-greenish grey. Reflectance data for Commission on Ore Mineralogy wavelengths in air for tennantite-(Ni) are: 31.0 (470 nm), 29.6 (546 nm), 29.6 (589 nm) and 29.3 (650 nm). Electron microprobe analysis for holotype material gave the empirical formula (on basis of total cations = 16 apfu): M (2) Cu 6 M (1) [Cu 4.00 (Ni 0.97 Cu 0.53 Fe 0.50 ) Σ2.00 ] Σ6.00 X (3) (As 2.94 Sb 1.06 ) Σ4 S 12.77 . Tennantite-(Ni) is cubic, with space group I $\bar{ 4}$ 3 m (#217), a =10.2957(9) Å, V = 1091.4(3) Å 3 and Z = 2. By using single-crystal X-ray diffraction, the crystal structure has been determined and refined to a final R 1 = 0.0423 on the basis of 163 independent reflections [ F o > 4σ ( F o )]. The calculated seven strongest powder X-ray diffraction lines [ d in Å ( I ) ( hkl )] are: 2.972 (100) (222), 1.820 (83) (440), 2.574 (28) (400), 1.552 (18) (622), 3.640 (10) (220), 1.880 (10) (521) and 1.287 (7) (800). Tennantite-(Ni) is isostructural with other tetrahedrite-group minerals, and nickel is hosted at the tetrahedrally coordinated M (1) site, along with Cu and minor Fe. The mineral and its name have been approved by the Commission on New Minerals, Nomenclature and Classification of the International Mineralogical Association (IMA2021-018).

Isostructural

Pleochroism

Monoclinic crystal system

Powder Diffraction

10.1180/mgm.2023.41

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Citations (3)

Mo endowment of porphyry deposits in the southern margin of the North China Craton controlled by magmatic water content

Mineralium Deposita (2023)

Xiaobin Miao Rui Wang Zengqian Hou Yunzhen Chang Chunhe Zhao

Fractional crystallization (geology)

Magmatic water

Igneous differentiation

10.1007/s00126-023-01188-6

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Citations (7)

Zircon xenocryst geochronology and implications for the Lhasa terrane evolution: Insights from Cenozoic volcanic rocks (Coqen, Tibet)

Journal of Asian Earth Sciences (2023)

Yufei Zhang Bo Xu Zengqian Hou Yi Zhao Zixuan Wang

Geochronology

Basement

10.1016/j.jseaes.2023.105763

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Citations (1)

Geological and Fluid Inclusion Constraints on Gold Deposition Processes of the Dayingezhuang Gold Deposit, Jiaodong Peninsula, China

Acta Geologica Sinica - English Edition (2019)

Peng Chai Zhe Zhang Zengqian Hou

The Dayingezhuang gold deposit, hosted mainly by Late Jurassic granitoids on Jiaodong Peninsula in eastern China, contains an estimated 170 t of gold and is one of the largest deposits within the Zhaoping fracture zone. The orebodies consist of auriferous altered pyrite–sericite–quartz granites that show Jiaojia‐type (i.e., disseminated and veinlet) mineralization. Mineralization and alteration are structurally controlled by the NE‐ to NNE‐striking Linglong detachment fault. The mineralization can be divided into four stages: (K‐feldspar)–pyrite–sericite–quartz, quartz–gold–pyrite, quartz–gold–polymetallic sulfide, and quartz–carbonate, with the majority of the gold being produced in the second and third stages. Based on a combination of petrography, microthermometry, and laser Raman spectroscopy, three types of fluid inclusion were identified in the vein minerals: NaCl–H 2 O (A‐type), CO 2 –H 2 O–NaCl (AC‐type), and pure CO 2 (PC‐type). Quartz crystals in veinlets that formed during the first stage contain mainly AC‐type fluid inclusions, with rare PC‐type inclusions. These fluid inclusions homogenize at temperatures of 251°C–403°C and have low salinities of 2.2–9.4 wt% NaCl equivalent. Quartz crystals that formed in the second and third stages contain all three types of fluid inclusions, with total homogenization temperatures of 216°C–339°C and salinities of 1.8–13.8 wt% NaCl equivalent for the second stage and homogenization temperatures of 195°C–321°C and salinities of 1.4–13.3 wt% NaCl equivalent for the third stage. In contrast, quartz crystals that formed in the fourth stage contains mainly A‐type fluid inclusions, with minor occurrences of AC‐type inclusions; these inclusions have homogenization temperatures of 106°C–287°C and salinities of 0.5–7.7 wt% NaCl equivalent. Gold in the ore‐forming fluids may have changed from Au(HS) 0 as the dominant species under acidic conditions and at relatively high temperatures and f O 2 in the early stages, to Au(HS) 2– under neutral‐pH conditions at lower temperatures and f O 2 in the later stages. The precipitation of gold and other metals is inferred to be caused by a combination of fluid immiscibility and water–rock interaction.

Sericite

Molybdenite

Shandong peninsula

10.1111/1755-6724.13849

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Citations (6)

The geochemical evolution of syncollisional magmatism and the implications for significant magmatic-hydrothermal lead–zinc mineralization (Gangdese, Tibet)

Lithos (2017)

Jin-Sheng Zhou Zhusen Yang Zengqian Hou Yingchao Liu Xiaoyan Zhao

Silicic

Igneous differentiation

10.1016/j.lithos.2017.07.004