摘要
通过1:5万区调工作,首次在天津蓟县地区发现海相沉积型海泡石矿层,这是本区在找矿方面的一个突破,海泡石矿赋存在蓟县系雾迷山组八段中一上部,含矿岩系厚约35m、层位稳定。二个矿层厚度分别为1.91m、2.21m,海泡石平均含量分别为25.6％、13.8％。形成环境属于浅海—滨海的碳酸盐台地。
A marine sedimentary sepiolite deposit was for the first time discovered in Middle and Upper Proterozoic strata in the Jixian area of Tianjin Municipality through. 1:50000 regional surveys. This is a major breakthrough in mineral prospecting in this area. The sepiolite deposit occurs in dolomite of the middle-upper part of the 8 th member of the Wumishan Formation of the Jixian System, yielding abundant stromatolites. The ore-bearing rock series. 35 m thick, is stratigraphically peisistent. This deposit includes two ore beds, which respectively are 1.91m and 2.21 m thick and have average grades of 25.6% and 13.%%. The ore-bearing dolomite was formed in an environment of neritic-littoral carbonate rock platforms.
出处
《中国区域地质》
CSCD
1992年第3期204-210,共7页
Regional Geology of China
