摘要
荥经县四人同铅锌矿位于上扬子台坳(Ⅱ)峨眉山断拱(Ⅲ)荥经断凹。矿区出露地层为震旦系下统苏雄组、奥陶系下统红石崖组及澄江期钾长花岗岩;构造发育,以北东-南西、北西-南东向断层为主。矿体产于花岗岩体断层破碎带及围岩接触带内,矿体规模较小,呈星点状、细脉状产出;矿石矿物为方铅矿、闪锌矿、黄铁矿,半自形它形晶粒结构,星点状、细脉状构造。黄铁矿化、褐铁矿化、硅化、辉绿岩化等矿化蚀变较强。矿床成因与北东-南西、北西-南东向的两组断层破碎带及围岩裂隙密切相关,矿体为中低温热液成矿作用有关的构造岩浆岩型矿床。断层破碎带及围岩接触带、矿化蚀变及围岩蚀变、隐爆角砾岩出露区域是重要的找矿标志。
The Sirentong Pb-Zn deposit in Yingjing,Sichuan lies in of the Yingjing faulted depression of the Emeishan broken arch of the upper Yangtze platform depression.The Lower Sinian Suxiong Formation,the Lower Ordovician Hongshiya Formation and Indo-Sinian moyite are exposed in the ore district.The NE-trending and NW-trending faults are developed in the ore district.The orebodies are confined to the fractured zone of granite intrusion and wallrock contact zone and consist of disseminated and veined ores.Ore minerals are galena,sphalerite and pyrite.The ores have hypidiomorphic and xenomorphic granular textures.Stronger wallrock alterations are pyritization,limonitizationand silicification.The ore-formation is in close relationship with fractured zones of the NE-trending and NW-trending faults and fissure in the wallrock.The deposit is a tectonomagmatic meso-and low-temperature hydrothermal one.
作者
刘勇
杨志民
LIU Yong;YANG Zhi-min(Regional Geological Surveying Team,BGEEMRSP,Chengdu 610213)
出处
《四川地质学报》
2021年第S02期37-40,共4页
Acta Geologica Sichuan
关键词
铅锌矿
地质特征
找矿标志
四人同
Pb-Zn deposit
geological feature
ore criteria
Sirentong
