河南汝阳东沟钼矿岩石矿物特征  

ROCK AND MINERAL CHARACTERISTICS OF DONGGOU MOLYBDENUM ORE DEPOSIT

作　　者：赵五洲[1] 严海麒[1] 靳拥护[2] 魏振伟[2] 孙强山[2] 

机构地区：[1]河南省地质调查院 [2]河南省地质矿产勘查开发局第二地质勘查院,河南许昌461000

出　　处：《中国钼业》2007年第4期3-9,共7页China Molybdenum Industry

摘　　要：东沟钼矿属斑岩型钼矿床。矿体形态受岩体形态、大小、围岩的物理性质和次级裂隙的发育程度控制。赋矿岩石主要为熊耳群中-中酸性火山喷出岩,少部分的次火山岩和燕山期钾长花岗斑岩;矿化对围岩没有选择性,与多期次构造活动所形成的次级裂隙的密集程度有关。钼矿化与围岩的蚀变有关。赋矿岩石及矿体围岩曾受多次热液蚀变作用,可分为2个成矿期:岩浆晚期及岩浆期后热液期。岩浆期后热液期为主要成矿期,由3个矿化阶段组成。由岩浆期后钾化蚀变与辉钼矿化关系密切,且仅分布于近矿围岩中,可作为寻找钼矿的指示矿物。Donggou molybdenum ore deposit belongs to porphyry type . The shape of orebodies is restricted to the shape , size and rockbody , physical nature of surrounding rocks and growth degree of sub - fracture. The host rocks are composed of the major medium to med - acid eruotive rocks of Xiong＇er Group,less subvolcanic rocks and the K - Fledspar granite - prophyry of Yanshan Age. The mineralization has no choice of surrounding rocks, which is related to sub - fracture density formed by more periodical structure activities. The Mo mineralization is related to surrounding rocks alteration. The host rocks and surrounding rocks have been affected by hydrothermal alteration . There are two matellogenic periods： late magma and hydrothermal period after magma. The hydrothermal period is the main endogentic stage, which is composed of three mineralization stages. The K - feldspar altered is related closely to molybdenite mineralization, which is distributed only near orebodies surrounding rocks and can be regarded as an indicator mineral for seek -molybdenum ore.

关 键 词：钾化 矿化阶段 结构构造 辉钼矿 

分 类 号：P618.65[天文地球—矿床学]