华北地台北缘多金属硫铁矿床地质及其成矿远景区划

通过对华北地台北缘多金属硫铁矿成矿构造环境、含矿建造、矿床成因类型、矿床地球化学等几个方面的综合研究。将华北地台北缘元古宙狼山-渣尔泰山、燕辽、辽东-吉南三大矿集区进行对比,认为该区矿床时控和层控性明显,且多受裂陷槽内次级断陷盆地的制约。具成层性,侧向延伸较稳定,有规律的成群成带分布,多具同生和后生成因叠加的特点。各矿床主要为海底喷气成因,在矿床形成时间、受构造与岩浆作用的影响及含矿岩系组合等方面又有一定差异。根据成矿规律,划分出17个成矿远景区。

GEOLOGH OF THE POLYMETALLIC PYRITE DEPOSITS ALONG THE NORTHERN MARGIN OF NORTH CHINA PLATFORM WITH A FOCUS ON REGIONAL DIVISION OF PROSPECTIVE AREAS

Comprehensive studies were made on the polymetallic pyrite deposits along the northern margin of North China platform in terms of their tectonic setting, ore-hosting formation, genetic types, geochemical characteristics, and so on, coupled with comparison among the three major metallogenic provinces of Proterpzoic age: Langshan-zhaertai, North Hebei-East Liaoning and East Liaoning-South Jilin. Results indicate that these deposits are characterized by clear time- and strata-controls (related to second-order fault basins of a rift basin), better bedding, consistent side-oriented extension, regular swarm or belt distribution, and syngenesis and epigenesist affinities. Individual deposits formed as associated with seafloor exhalation process but differ, to a certain degree, from one another in mineralizing time, tectonic and magmatic involvement and ore-hosting lithologic assemblages. Eleven metallogenic prospective areas have been recognized, based on metallogenic rules.