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40Ar-39Ar Isotopic Dating for Paishanlou Gold Deposit and Its Geological Implication
Author(s): 
Pages: 1482-1485
Year: Issue:  10
Journal: JOURNAL OF NORTHEASTERN UNIVERSITY(NATURAL SCIENCE)

Keyword:  钾长石40Ar-39Ar年龄金矿床排山楼辽宁省;
Abstract: 采用Ar-Ar同位素测年法对辽宁排山楼金矿床矿化阶段形成的钾长石和似斑状花岗岩中的钾长石进行了测试,获得矿化阶段形成钾长石40Ar-39Ar坪年龄为(116 69±1 15)Ma,等时线年龄为(116 97±1 39)Ma,以及似斑状花岗岩中原生钾长石40Ar-39Ar坪年龄为(126 71±2 03)Ma,等时线年龄为(124 00±4 32)Ma的数据.前者代表了该矿床的形成年龄,即该矿床形成于早白垩世,后者表明金矿化不早于(126 71±2 03)Ma.这一成矿年龄与华北陆块北缘大部分金矿床的成矿年龄一致,表明华北陆块北缘绝大多数金矿床形成于中国东部中生代动力学体制发生转折的时期.
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