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湖南某黄铁矿在一九七五年以前一直是作为铁矿或多金属硫化矿床进行工作的。一九五八年前后相继有几个地质队做过一些地表地质工作,认为是泥盆系棋子桥组中的风化残积铁帽。一九七二年我队开展物探和地表地质工作,采用自然电场法,圈定了六个局部异常,最高异常值—600毫伏,认为该铁帽可能与热液交代硫化矿床有关。一九七五年对铁帽和自电异常开展验证评价,开始在铁帽上连续施工数孔,均未遇到硫化矿体,仅见底部棋子桥组灰岩。之后,在西部最后一
A pyrite in Hunan Province had been working as an iron ore or polymetallic sulfide deposit before 1975. Several geologic teams successively conducted some surface geology work before and after 1958 and considered it as the weathered residual iron cap in the Devonian Qixizhaqiao Formation. In 1972, our team carried out geophysical and surface geology work. Using the natural electric field method, we delineated six local anomalies with the maximum anomalous value of -600 mV. It is believed that this iron cap may be related to hydrothermal replacement of sulphide ore deposits. In 1975, the iron cap and self-anomalies were verified and evaluated. Several holes were continuously constructed on the iron cap. None of the sulphide ore bodies were encountered. Only the limestone at the bottom of the pavilion was found. After that, the last one in the west