| 杨泽强.河南省商城县汤家坪钼矿围岩蚀变与成矿[J].地质与勘探,2007,(5):17-22 |
| 河南省商城县汤家坪钼矿围岩蚀变与成矿 |
| WALLROCK ALTERATION AND MINERALIZATION IN THE TANGJIAPING Mo DEPOSIT OF SHANGCHENG COUNTY, HENAN PROVINCE |
| 修订日期：2006-07-17 |
| DOI： |
| 中文关键词: 斑岩钼矿 围岩蚀变 汤家坪 |
| 英文关键词: Porphyry Mo deposit, wallrock alteration, Tangjiaping |
| 基金项目: |
| 杨泽强 |
| [1]河南省地质矿产勘查开发局第三地质调查队,信阳464000 [2]河南省地质调查院,郑州450007 |
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| 中文摘要: |
| 文章从矿床地质特征、蚀变岩石的元素含量特征及蚀变分带研究入手,认为硅化和钾长石化岩石的钼含矿性最强,硅化和钾长石化与钼成矿关系密切.研究表明,围岩蚀变始终伴随着钼成矿作用的每个阶段,且不同的成矿期和成矿阶段、不同的围岩,其蚀变类型不同;矿床蚀变分带明显,由岩体中心向外侧依次为钾长石化-硅化带(强蚀变带)、硅化-绢英岩化带(弱蚀变带)、硅化-青磐岩化带,强度由中心向外围逐渐减弱,其蚀变作用的强弱与钼矿体的品位高低相对应,确定硅化和钾长石化是该区最有效的找矿标志之一. |
| 英文摘要: |
| Based on geology, dement content of alteration rocks and alteration zonation, it is suggested that silicification and potassium feldspar alteration rocks have highest Mo content, and are related with Mo mineralization. It is shown shat wallrock alteration is accompanied with each stage of Mo mineralization, and alteration types are different with different mineralization epoch, mineralization stage, and wallrocks. There exists an obvious alteration zonation. From center to outside, wallrock alteration types change from potassium feldspar alteration to silicification zone in the strong alteration belt or silicification to phyllic alteration in the weak alteration belt plus silicification to advance argiUic. Alteration intensity also changes from strong to weak, and is corresponding to Mo content of in the ores. Identification of silicification and potassium feldspar alteration is one of effective ore -finding sign. |
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