摘要
尚家庄钼矿床产于燕山晚期伟德山超单元斑状花岗闪长岩中,受岩体内部裂隙构造控制,呈NW走向,主矿体呈似层状、大脉状产出,具分支复合、膨胀夹缩等特点。3件辉钼矿Re-Os同位素测年结果表明,模式年龄为(115.5±1.6)Ma^(117.6±1.6)Ma,平均年龄为(116.4±1.6)Ma,与胶东金矿大规模成矿的时代和赋矿围岩——伟德山超单元营盘单元的成岩时代一致,说明胶东地区存在与金成矿同期的钼矿成矿作用。
The Shangjiazhuang Mo deposit is hosted in the porphyritic granodiorite which belongs to Weideshan Late Yanshanian ultra unit. It is controlled by the fractures in the interior of the magnaatic body and in NW direction. The main ore bodies assume stratoid and large vein forms, and are characterized by branching and recombination as well as expansion and pinch-out. R.e-Os dating of three molybdenite separates from ores has yielded weighted ages （115.5＋l.6）Ma^（l17.6_＋l.6）Ma, and a weighted mean age of （116.4＋1.6）Ma, implying that the metaUogenic epoch of Mo is nearly identical with the large-scale metallogenic epoch of Au in Jiaodong area, and nearly the same as the diagenetic epoch of their country rock--Yingpan unit of Weideshan super unit. It is proved that there existed a series of Au and Mo ore-forming processes which occurred almost in the same metallogenic epoch and were related to Weideshan granite in [iaodong area.
出处
《中国地质》
CAS
CSCD
北大核心
2013年第5期1612-1621,共10页
Geology in China
基金
山东省地质矿产勘查开发局科研项目(KY201004)资助
关键词
尚家庄钼矿
RE-OS同位素年龄
伟德山超单元
成矿作用
胶东金矿
Shangjiazhuang Mo deposit
Re -Os isotope age
Weideshan ultra unit
metallogenesis
gold depositsin Jiaodong area
