海南省罗葵洞斑岩型钼矿床花岗岩类地球化学特征

The Granite Geochemical Characteristics of the Luokuidong Mo Deposit,Hainan Province

罗葵洞钼矿床为斑岩型钼矿床,矿床具有明显的面状蚀变分带现象,其成矿母岩是早白垩世似斑状花岗岩。该岩为高Si、富Al的高钾钙碱性花岗岩,具有A型花岗岩的特征,岩浆分异程度与分离结晶程度较高。通过微量元素分析认为,Mo、W、Cu、Pb、Ag等元素与成矿关系密切,可作为寻找该类矿床的地球化学证据。

Luokuidong molybdenum deposit is a porphyry molybdenum deposit,the deposit has obvious planar alteration zoning,the host rock is the early Cretaceous porphyritic granite.The rock is a high K calcalkaline granite with high Si and rich Al,which has the characteristics of A type granite.It is characterized by high magmatic differentiation and high degree of crystallization.Through the analysis of trace elements,it is considered that elements such as Mo,W,Cu,Pb and Ag are closely related to mineralization,which can be used as geochemical evidence for the prospecting of such deposits.