首页> 中文期刊> 《铀矿地质》 >诸广岩体高坪地区铀矿化围岩蚀变特征

诸广岩体高坪地区铀矿化围岩蚀变特征

         

摘要

The paper mainly discussed the distribution and correlation character of wall rock alteration and their relation to fault and uranium mineralization in Gaoping area by assigning data to alteration in-tensity of drill core and making contour,calculating correlation index between alterations and their rela-tion to uranium mineralization in the hanging wall and foot wall of Huangxi fault,and comparing altera-tion intensity with the rock of Indo-Chinese and Yanshanian pluton in major,trace elements and REE. Through comprehensive study,the difference in hanging wall and foot wall of Huangxi fault was summa-rized,and found that the hanging wall of Huangxi-fault had been destroyed heavier and eroded much than the footwall and the ration of Fe3 +/Fe2 + and LREE/HREE in the wall rock may play an reference role for the uranium prospecting in Gaoping area.%文章的主要内容为:(1)对高坪地区某地质剖面的钻孔岩心蚀变强度进行赋值,将所得的数据绘制成等值剖面图,分析蚀变数据在剖面上的特征;(2)通过蚀变强度数值,求出黄溪断裂带上、下盘各种蚀变之间及其与铀矿化的相关系数,得出各种蚀变之间的相关性;(3)将强蚀变岩石、弱蚀变岩石与燕山期、印支期正常花岗岩进行对比,研究蚀变岩石的化学成分及微量元素、稀土元素特征。通过综合比对研究,讨论黄溪断裂带上下盘岩石差异的原因,总结该区铀成矿规律;推测黄溪断裂上盘受矿后期构造破坏更强,且相对抬升更高;认为该区围岩中 Fe3+/Fe2+和 LREE/HREE 值对铀矿找矿有一定的指导意义。

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