宁镇中段矿化斑岩体的侵位深度及剥蚀程度研究

Study on emplacement depth and denudation extent of mineralized porphyry body in middle Nanjing-Zhenjiang Mountains

判别岩体侵位深度对找矿富有指导意义,查明岩体剥蚀程度是评价斑岩铜矿找矿前景的重要因素之一。运用岩体"盖层"厚度恢复法、成岩温度与压力计算法、蚀变矿化分带判别法、岩体的顶垂体、捕虏体、析离体及岩脉发育状况判别法,以及岩石的结构、构造和矿物结构形态判别法,综合研究了宁镇中段主要斑岩体的侵位深度和剥蚀程度,结果表明宁镇中段侵入体总体上具有由西向东、由南向北剥蚀程度逐渐加深的特点。

Studies of emplacement depth and denudation extent of rock mass should be instructive to ore prospecting. The authors studied the emplacement depth and denudation extent of the main porphyry bodies in the middle parts of Nanjing-Zhenjiaug Mountains with help of ＇ cover layer＇ thickness restoration method of the rock mass, temperature and pressure methods of diagenesis, discriminance of alteration and mineralization zoning, xenoliths, texture and structure results. The study results showed that denudation extent in the middle parts of Nanjing-Zhenjiang Mountains increased gradually from west to east and decreased from north to south.