青海大柴旦红灯沟矿区硅质岩的成因分析  

The Genetic Analysis of Silicite in Hongdenggou Ore District,Qinghai Dachaidan

作　　者：顾道生 樊俊昌[2,3] 赖健清[2] 

机构地区：[1]泰州广播电视大学泰兴分校,泰兴225400 [2]中南大学地球科学与信息物理学院,长沙410083 [3]青海西部矿业地质勘查有限公司,西宁810016

出　　处：《中国科技信息》2011年第16期17-18,共2页China Science and Technology Information

摘　　要：对青海大柴旦红灯沟矿区上奥陶统滩间山群地层中硅质岩的岩石化学和地球化学研究表明:本区紫红色硅质属于热水沉积成因,形成于活动大陆边缘的岛弧及弧后的火山沉积盆地中,与中基性火山活动密切相关,受同生断裂带的控制,具有浅水洼地环境特点。By the studying of the petrochemistry and geochemistry of silicate in the strata of the lower Ordovician Tanjianshan group in Hongdenggou ore district,Qinghai Dachaidan,it is indicated that,in this area,the pureple silicite was hydrothermal fluid sedimentary origin.It was formed in islandarc of active continental margin and back-islandarc volcanic sedimentary basin,and closely related with medium-basic volcanic activities,and controlled by contemporaneous faults.It had the shallow-water depression environment characteristics.

关 键 词：热水沉积成因 岛弧 硅质岩 红灯沟 

分 类 号：P581[天文地球—岩石学]