柴北缘锡铁山铅锌矿床喷流通道口的识别及其对矿床成因和找矿勘查的指示  

Identification of the Spray-vents and Their Implications to the Origin and Ore-prospecting of the Xitieshan Pb-Zn Deposit in Northern Edge of the Qaidam Basin

作　　者：王海丰[1] 韩凤彬[2] 陈正乐[2,3] 冯志兴[1] 李正明[1] 展卫露 陈柏林[2] 江万[2] 石永红 刘博 李季霖 谭人文 WANG Hai-feng;HAN Feng-bin;CHEN Zheng-le;FENG Zhi-xing;LI Zheng-ming;ZHAN Wei-lu;CHEN Bo-lin;JIANG Wan;SHI Yong-hong;LIU Bo;LI Ji-lin;TAN Ren-wen(Western Mining Co.,LTD, Xining 810001, China;Key Laboratory of Paleomagnetism and Tectonic Reconstruction, Ministry of Natural Resources, Institute of Geomechanics, CAGS, Beijing 100081,China;State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, China)

机构地区：[1]西部矿业股份有限公司,青海西宁810001 [2]中国地质科学院地质力学研究所自然资源部古地磁与古构造重建重点实验室,北京100081 [3]东华理工大学核资源与环境国家重点实验室,江西南昌330013

出　　处：《东华理工大学学报（自然科学版）》2021年第5期451-461,共11页Journal of East China University of Technology(Natural Science)

基　　金：西部矿业股份有限公司地质找矿科研项目(XKKY-XTS201901);中国地质调查局基本科研业务费项目(JYYWF20183702,JYYWF20180602)。

摘　　要：为进一步探究锡铁山铅锌矿成因和扩大矿山资源量,通过对矿区地质调查以及岩芯观测,在锡铁山矿区发现了一系列独特的沉积构造,如多岩性层的交混揉皱、金属硫化物分层半圆形环带和泄水角砾构造,伴随发育了铁、锰、铅、锌等矿化。在钻孔岩芯中,也发现了一些特殊的条带角砾构造。通过与现代海底“黑烟囱”以及爱尔兰和乌拉尔等地区的古生代“黑烟囱”构造对比,认为这些构造为原生的沉积构造,应属于上涌的成矿物质与海水相互作用的产物,指示了原生喷流通道口的位置。这些原生的喷流通道口呈近似等间距展布,受控于同生沉积断裂和原生的横张断裂。喷流通道口的识别进一步支持了该矿床与海底喷流(VSHMS)有关,同时指示了喷流通道口附近为成矿物质聚集的有利场所,也是寻找富大矿体的主要区域。In order to further explore the genesis of Xitieshan lead-zinc deposit and expand mine resources,a series of sedimentary structures were discovered based on the geological survey and core observation in the mining area.These structures include the cross-mixed corrugations of the multi-lithological layers,the layered semicircle band of metal sulfide and the sluice-brecciated structures,which accompanied by the mineralization of Fe-Mn and Pb-Zn etc.Similar special sluice-brecciated and banded structures are also identified in the rocks from drilling holes.By comparing with modern and Paleozoic black chimneys in Iceland and the Urals,these structures should be native to sedimentary structures and be the product of ore-forming substances interacting with the seawater at the seafloor,indicating the positions of primary spray-vents which are distributed approximately equally spaced and are controlled by the syn-genetic sedimentary and primary transverse faults.The identification of primary spray-vents further supported that the deposit is a kind of volcanic-sedimentary-hosted massive sulphide(VSHMS)deposit,and suggesting that the area near the spray-vents should be a favorable place for the accumulation of ore-forming materials and therefore be the main area for searching of high-grade ore bodies.

关 键 词：锡铁山铅锌矿 喷流通道口 矿床成因 找矿勘查 柴北缘 

分 类 号：P618[天文地球—矿床学]