河南省南召五峰顶方解石矿床地质特征及找矿标志

河南省南召五峰顶方解石矿床产于二郎坪群大庙组第三岩性段的大理岩中，矿体呈似层状。矿区圈定出方解石矿体2个，矿体长2.0~3.2 km，厚11.91~85.22 m，矿石品位w（CaO）=52.20%~56.25%，白度为85.0%~93.9%，矿石类型为浅灰白色厚层状中粗粒大理岩。文章对矿床含矿岩系、矿体与矿石特征、成矿过程和找矿标志等方面进行了分析研究。结果表明：该矿床为区域变质型矿床，大庙组中浅灰白色大理岩为直接找矿标志。该标志对豫西东秦岭造山带寻找同类矿床有借鉴意义。

Geological characteristics and prospecting marks of the Wufengding calcite deposit in Nanzhao county, Henan province

The Wufengding calcite deposit occurs in marble of the third member of Damiao formation of Erlangping group. Two ore bodies have been delineated in stratiform, 2.0-3.2 km long and 11.91-85.22 m thick with w(CaO₂)=52.20%-56.25% and whiteness 85.0%-93.9%. The ore belongs to light grey white thick bedded medium-coarse grained marble type. Analysis and study on characteristics of the ore-bearing rock sequence, ore body and ore, the ore-forming process and prospecting marks show that the calcite deposit is a regionally metamorphic deposit and light grey white marble of Damiao formation is the prospecting mark, even the mark could be reference for such type calcite ore deposit prospecting at the eastern Qinling orogenic belt in the West Henan province.