山西五台山地区早前寒武纪年代构造格架--《前寒武纪研究进展》1997年02期

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i@ ^w$m/i oy0【摘要】:根据作者等近10多年来在五台山地区的早前寒武纪同位素地质研究,采用单颗粒锆石U-Pb、单颗粒结石蒸发Ph、常规钻石U.Ph、全岩Ph-Ph、全岩Rb-Sr、全岩Sin.Nd和角门石40Ar-39Ar等多种同位素测年方法获得的27个数据,并以单粒颗锆石U-Pb法的9个年龄作为定年的基准,通过与其它同位素测年结果相互印证的综合研究,遂对五台山地区早前寒武纪重大地质事件年代给予了更进一步的限定,同时勾勒出了它的年代构造格架。水利论文{:\*g!q1T3H

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五台山 早前寒武纪 地质年代 年代构造格架

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【基金】:国家自然科学基金!49273179

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1引言五台山地区早前寒武纪变质基底的Rb-Sr和Sin-Nd等同位素体系能保持其母、子体元素衰变图式不变,是十分困难的。有理由怀疑这些体系不是原始的,而可能与Black(1988)[‘妍究南极洲EnderbyLand所认为的那样,是重设了的同位素体系,

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