摘要
矿床类型及其特征为有利于指导找矿和矿床评价,矿床分类的基本原则应该是:(1)既不是成因分类亦不是工业分类,而是以成因为基础,以工业意义为主导的两者有机结合;(2)以“多因成矿”观点指导矿床分类,从宁镇地区内生金属矿床的实际情况出发,既考虑岩浆热液成矿作用,亦重视层控或沉积改造等成矿作用的影响;(3)分类方案力求简明实用,能基本概括目前该区内生金属矿床的主要类型。
The paper summarizes the space-time prospecting criteria of endogenetic metallic deposits in Nanjing-Zhenjiang area which are closely related to the magmatic series. tectonic structures and stratigraphic beds. The second intrusion of syntectic Late Yanshanian middle-acid magmatic rock is the important base for Cu, Mo. S, polymetallic mineralization. The mineralization from magmatic rock to host rock usually appears '4-storey' structure of different deposits no matter in vertical or horizontal distribution, i. e. from porphyry Cu, Mo, W mineralization in front of magmatic rock body to skarn type deposit in the contact zone, to pneumatolyto-hydrothermal Cu. Fe. S deposits. to high-middle -temperature hydrothermai filling Cu, S, Pb. Zn mineralization near host rock to middie-low temperature tele-host rock hydrothermai filling Pb. Zn, Ag mineralization. The corresponded element assemblage of geochemical exploration, geophysical anomaly is the macro criteria for hunting and prospecting each kind of ore deposit. The paper further points out the prospecting area in the whole area.
出处
《江苏地质》
1993年第3期140-147,共8页
Jiangsu Geology
