作者：

Mao, J. W. ; Xie, G. Q. ; Bierlein, F. ; Que, W. J. ; Du, A. D. ; Ye, H. S. ; Pirajno, F. ; Li, H. M. ; Guo, B. J. ; Li, Y. F. ; Yang, Z. Q.

单位：

Chinese Acad Geol Sci, Inst Mineral Resources, Beijing 100037, Peoples R China;Univ Western Australia, Ctr Explorat Targeting, Perth, WA 6009, Australia;Chinese Acad Geol Sci, Natl Res Ctr Geoanal, Beijing 100037, Peoples R China;Geol Survey Western Australia, Perth, WA 6004, Australia;China Univ Geosci, State Key Lab Geol Proc & Mineral Recourse, Beijing 100083, Peoples R China;Henan Bur Geol & Mineral Resources, Geol Survey 3, Xinyang 464000, Peoples R China

摘要：

The East Qinling-Dabie molybdenum belt is part of a larger East-West trending metallogenic belt in eastern China. Most of the molybdenum deposits occur as porphyry or porphyry-skarn type, but there are also some vein type deposits. Following systematic Re-Os dating of molybdenite from 13 deposits and comparisons with two previously dated deposits, we have recognized that the molybdenum mineralization in the East Qinling-Dabie belt was developed during hydrothermal activity linked to magmatism and the emplacement of granitoid stocks. Three pulses of granitoid magmatism and Mo mineralization are recognized corresponding to significant tectonic events in the East Qinling-Dabie belt. Vein type deposits dated at 233221 Ma were formed in detachment fractures, indicating localized extension within the collisional setting of the North China and Yangtze Cratons. I-type and transitional I- and S-type granites and related mineralization dated at 148-138 Ma may have formed part of a continental magmatic arc, with widespread magmatism and back-arc extension caused by subduction of the Izanagi or Paleopacific plate beneath the Eurasian continent in a WNW-ESE direction in the Late Jurassic-Early Cretaceous. Both S-type and transitional S- and I-type granite-associated porphyry molybdenum deposits dated at 131-112 Ma are part of an extensive mineralization event throughout East China that can be ascribed to regional large-scale lithospheric thinning, delamination and thermal erosion. (C) 2008 Elsevier Ltd. All rights reserved.

基金：

National Natural Science Foundation of China [40434011]; State Key Fundamental Program [619990432016]

语种：

英文

DOI：

10.1016/j.gca.2008.06.027

来源：

GEOCHIMICA ET COSMOCHIMICA ACTA,2008(18):4607-4626.

出版日期：

2008-09-15

提交日期：

2017-12-14

引用参考：

Mao, J. W.; Xie, G. Q.; Bierlein, F.; Que, W. J.; Du, A. D.; Ye, H. S.; Pirajno, F.; Li, H. M.; Guo, B. J.; Li, Y. F.; Yang, Z. Q.. Tectonic implications from Re-Os dating of Mesozoic molybdenum deposits in the East Qinling-Dabie orogenic belt[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2008(18):4607-4626.