摘要
近年来,在著名的河把燕山金矿带西段发现了钾化蚀变岩型金矿床。矿床产于混合源变质-交代型的(石英)二长岩体内微斜长石交代岩的破碎带中,以及岩体附迁的变质岩内,为-新的矿床类型,它是该区深大断裂带自大古代至燕山期反复多次活动对金的活化、迁移和富集的产物,特别是海西期沿构造带的局部性混合岩化作用、期后热液沿各级构造裂隙的交代作用,促进金的富集,局部形成混合岩化中温热液矿床。本文介绍了矿床产出的大地构造条件,矿床地质特征和对成因的认识,最后指出了进一步寻找金矿的方向。
Gold deposits of potassic-alteration rock type has been found recent years in the west of well known Yanshan gold mineralization belt,Hebei province. The ore bodys are in the fractured zones of microcline metasomatite within quartz monzonite formed by matamorphic-matasomatism of mixed sources, and in the matamorphite in the vicinity of quartz monzonite. The ore type is a special one. The gold remobilization, migration and concentration were controlled by the poly-remobilization of large deep fracture zone along which the quartz monzonitic metasomatite and microcline metasomatite of Hercynian stage were formed, and then the hydrothemeral solution rich in potassium eveloped along the secondary fracture systems promoted the concentration of the gold.The characteristics, tectonic settings and genesis of the deposits have been present in this paper. At last, the authors provide the promising areas of the future prospecting.
出处
《地质科技情报》
CAS
CSCD
北大核心
1990年第1期75-80,共6页
Geological Science and Technology Information
