摘要
铜镍矿床的地球化学勘查评价实质上是基性—超基性岩体含矿性的评价。岩浆铜镍硫化物矿床与基性、超基性岩体具有空间和成因联系 ,其主要成晕微量元素以Cu、Ni、Co、Cr、Ag为主 ,而且含矿岩体的这些元素的平均值高、离差大。矿床区域地球化学异常发育 ,异常的分布受基性—超基性岩岩群和岩带制约 ,异常浓集中心与矿田的岩矿体一致。矿区异常继承了区域异常的组分 ,异常的高值区与矿床对应。矿床的原生晕具有组分分带 ,前缘元素是I、F、B、Ba、As、Mo ;近矿元素是Ag、Cr;矿元素是Cu、Ni、Co。利用原生晕的组分分带特征可判断矿体的剥蚀程度和预测隐伏的岩矿体。
Cu-Ni sulfide deposits of magmatic segregation style are related with basic and ultrabasic rocks in spatial and genetic. The major element halos of the deposit are Cu,Ni,Co,Cr,Ag with high mean and standard deviation in ore-bearing rock mass. Regional geochemistry anomaly in mining deposit was well-developed, and anomaly distribution is controlled by sill and swarm of basic and ultrabasic rock. The strong anomaly of the element is coincided with ore-bearing bodies in the orefield. The concentration center of the anomaly is coincided with mineral deposit. The primary halo of mineral deposit has vertical zoning of the elements, with I,F,B,Ba,As,Mo as front elements,with Ag,Cr as near element of deposit,and Cu,Ni and Co as mine razing element.The zoning rules of primary halos of the elements could be used to discriminate denuding level of the ore body, and to predict ore-bearing rock mass.
出处
《地质与勘探》
CAS
CSCD
北大核心
2001年第5期6-9,共4页
Geology and Exploration
