Mineralization and ore-controlling implications of low-angle faults

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	Mineralization and ore-controlling implications of low-angle faults
	Chen, BL 3; Liu, JM ; Zhang, D ; Wu, JS
刊名	ACTA GEOLOGICA SINICA-ENGLISH EDITION
	1999
卷号	73 期号:4 页码:438-446
关键词	low-angle fault ore-controlling structure structural metallogenesis geochemical interface of mineralization host structure
ISSN号	1000-9515
英文摘要	Low-angle faults include those occurring in thrust-nappe structures in a compressive setting and the detachment of metamorphic core complexes in an extensional setting. All low-angle faults have their own particularities. The low-angle fault plays an important role in controlling over some endogenetic metallic ore deposits. Based on studies of the Xiaoban gold deposit, Xinzhou gold deposit, and Longfengchang polymetallic ore deposit, and comparisons with other mines, the authors conclude the ore-controlling implications of low-angle faults as follows. (1) Because of high temperature and high pressure, as well as strong ductile deformation, the internal energy of the elements rises in the large-scale deep ductile low-angle faults, which causes the elements to activate and differentiate from the source rocks, forming ore-bearing hydrothermal solution, and bring mineralization to happen. (2) When rising from depths and flowing along the low-angle faults, the ore-bearing hydrothermal solution will alter and replace the tectonites in the fault zone. The rocks of the hanging side and the heading side differ in lithology, texture and structure, which results in changes or dissimilarities of the physical-chemical conditions. This destroys the balance of the hydrothermal solution system and causes the dissolved ore-forming elements to precipitate; as a result, a deposit is formed. Therefore, the meso-shallow ductile-brittle low-angle faults play the role of a geochemical interface in the process of mineralization. (3) Low-angle faults are often one of the important host structures.
学科主题	矿床地质
WOS关键词	METAMORPHIC CORE COMPLEXES ; DETACHMENT
WOS研究方向	Geology
语种	英语
出版者	GEOLOGICAL SOC CHINA
WOS记录号	WOS:000085751800008
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/37369]
专题	中国地质科学院地质力学研究所
作者单位	1.CAGS, Inst Geomech, Beijing 100081, Peoples R China. 2.W Fujian Geol Party FBEDGMR, Sanming 365000, Peoples R China. 3.中国地质科学院地质力学研究所
推荐引用方式 GB/T 7714	Chen, BL,Liu, JM,Zhang, D,et al. Mineralization and ore-controlling implications of low-angle faults[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,1999,73(4):438-446.
APA	Chen, BL,Liu, JM,Zhang, D,&Wu, JS.(1999).Mineralization and ore-controlling implications of low-angle faults.ACTA GEOLOGICA SINICA-ENGLISH EDITION,73(4),438-446.
MLA	Chen, BL,et al."Mineralization and ore-controlling implications of low-angle faults".ACTA GEOLOGICA SINICA-ENGLISH EDITION 73.4(1999):438-446.