【摘要】：義敦島弧中段夏塞地區(qū)發(fā)育多個由斷裂破碎帶控制的大、中型巖漿熱液脈狀多金屬礦床,這些礦床具有極其相似的地質(zhì)背景,形成于相同的斷裂構(gòu)造體系。本文選取夏塞銀鉛鋅礦床進行控礦斷裂特征調(diào)查、斷裂構(gòu)造序次和成礦應力場分析及礦體定位機制研究,以期為該地區(qū)熱液礦床的下一步找礦工作提供理論依據(jù)。對該礦床成礦地質(zhì)背景及控礦斷裂構(gòu)造的綜合研究表明:(1)礦區(qū)NNW向控礦斷裂具有多期活動且成礦階段斷裂性質(zhì)為左行正斷層;(2)礦體定位于德格-鄉(xiāng)城斷裂和德萊-定曲斷裂(Ⅰ)的次級斷裂(Ⅱ)所派生的NNW向更次級的結(jié)構(gòu)面(Ⅲ)中;(3)礦區(qū)NNW向斷裂控制著礦化局部富集空間、礦脈展布型式及礦體的產(chǎn)出。
[Abstract]:There are many large and medium-size magmatic hydrothermal vein polymetallic deposits controlled by fracture zone in Xassai area in the middle segment of Yidun Island Arc. These deposits have very similar geological background and formed in the same fault structure system. In this paper, the ore-controlling fault characteristics of Xiasai silver-lead-zinc deposit are investigated, the sequence of fault structure and metallogenic stress field are analyzed, and the mechanism of orebody location is studied in order to provide theoretical basis for the next prospecting of hydrothermal deposit in this area. A comprehensive study of the metallogenic geological setting and ore-controlling fault structure of the deposit shows that: (1) the NNW ore-controlling fault in the ore area has multi-stage activity and the fault property of the metallogenic stage is left-lateral normal fault, (2) the orebody is located in the Degue-Xiangcheng fault and the Dela fault. (3) the NNW trending faults of the mining area control the local enrichment space of mineralization, and the secondary faults (鈪，

本文編號：2143679