摘要
板庙子金矿区主要矿石类型有含金黄铁矿型和含金多金属型,对两类矿石研究表明金赋存于黄铁矿和交代、穿切黄铁矿的黄铜矿中,主要与黄铁矿有关;对矿石中的A u、A g、Cu、Pb、Zn、Co、N i、B i、R b、S r、B a元素进行R型聚类分群,结果为A u+B i、A g+Zn+Cu+Co+Pb+N i、R b+S r+B a三群;对两类矿石与成矿关系密切的脉岩进行Q型聚类分群,结果表明金—黄铁矿型矿石与辉绿岩、煌斑岩、花岗斑岩有关,金—多金属型矿石主要与二长花岗斑岩、闪长玢岩有关,并与实际地质调查认识一致。由此明确了本矿区中金主要形成于金—黄铁矿阶段,少量形成于金—多金属阶段,随着岩浆由中性向酸性演化,成矿作用由贵金属向多金属矿化转变,并在空间上形成叠加。
There are mainly two ore types in Banmiaozi gold mining area, namely, gold -bearing pyrite and gold-bearing polymetallic type, the research shows that gold occurs both in pyrite and replacement and transverse chalcopyrite which is related to the pyrite, most of gold exists in the pyrite; through R type clustering analysis of Au, Ag, Cu, Pb, Zn, Co, Ni, Bi, Rb, Sr and Ba, the result shows three coalescences by Au＋Bi, Ag＋Zn ＋Cu＋Co＋Pb＋Ni and Rb＋Sr＋Ba; through the analysis of Q type clustering and vein related with mineralization, the result shows that gold-pyrite type ore is related with the diabase, lamprophyre and granite-porphyry; the gold-polymetallic type ore is related with the monzonitic granite- porphyry and diorite-porphyrite, the result also accords with the cognition from the practical geologic surveying. So the authors defined a conclusion that most gold derives from the gold-pyrite stage, others derive from gold- polymetallic stage, with the magma evolve from neutral rock to acidite, the mineralization evolve from noble metal to polymetale, and forming spatial superpose.
出处
《吉林地质》
2006年第2期1-7,共7页
Jilin Geology
关键词
金矿区
成矿阶段
微量元素
R型聚类分析
Q型聚类分析
gold mining area
metallogenitic stage
microelement
R type clustering analysis
Q type clustering analysis
