Geology and Genesis of Lead-Zinc Polymetallic Deposits in the Great Xing'an Range

被引：0
作者：
Lü X. [1 ,2 ]
Yang J. [1 ]
Fan X. [2 ]
Wei W. [1 ]
Mei W. [1 ]
Ruan B. [1 ]
Wang X. [2 ,3 ]
Gun M. [2 ,4 ]
机构：
[1] Institute of Geological Survey, China University of Geosciences, Wuhan
[2] School of Earth Resources, China University of Geosciences, Wuhan
[3] Wuhan Center of Geological Survey CGS, Wuhan
[4] Guizhou Non-Ferrous Metals and Nuclear Industry Geological Exploration Bureau, Guiyang
来源：
Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | 2020年 / 45卷 / 12期
关键词：
Deposit geology; Genetic model; Great Xing'an Range; Lead-zinc deposit; Metallogeny belt;
D O I：
10.3799/dqkx.2020.995
中图分类号：
学科分类号：
摘要：
As breakthrough achieved in recent exploration, lead-zinc polymetallic deposits in the Great Xing'an Range have shown complexity and differences in aspects of mineralized elements, temporal-spatial distribution, genesis and so on. For a further inspection of the variation and its internal causes, data from medium-large sized deposits are compiled and compared in this study. Main conclusions are summarized: (1) these deposits formed three parallel NE trending belts with a higher intensity in the southern belt; (2) two major phases of mineralization are recognized as in the Middle-Late Triassic (less important) and the predominant Late Jurassic-Early Cretaceous, superimposed mineralization is also notable; (3) epithermal deposit is representative in the northern belt, while skarn- and magmatic hydrothermal vein-types are more common in the middle and the southern belts; (4) under the Late Jurassic-Early Cretaceous extensional environment, enormous acidic-intermediate magma emplacement affected the whole Great Xing'an Range, leading to the formation of various lead-zinc polymetallic deposits, among which tin-rich ones in the southern belt exhibit genetic links to highly differentiated magma; (5) strong spatial association between the fluorine-, manganese-related alteration and mineralization is noticed; (6) deposits in the northern, middle and southern belts have their sulfur sourced from genetically related volcanic-subvolcanic rocks, ore-related magma and a combination of magma and country rocks; (7) Pb isotope data indicate that most deposits have a mixed lead source from orogeny, probably due to similar regional post-orogenic background in the Late Jurassic-Early Cretaceous; (8) as suggested by H-O isotopic data, meteoric water contributes more for fluid source in epithermal deposits, despite a more crucial role of magmatic water in skarn- and magmatic hydrothermal vein-type deposits. © 2020, Editorial Department of Earth Science. All right reserved.
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页码：4399 / 4427
页数：28
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