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本文的测试结果表明,展布在江西广丰的田里岩组白云母40Ar/39Ar坪年龄为1019±0.9Ma,而分布于浙江江山政棠的游溪岩组的黑云母40Ar/39Ar坪年龄为501.2±2.2Ma,热事件年龄为127Ma。它们是两条较大规模的韧性剪切带,该年龄代表了它们的形成年代。本文还综合分析了区域地质调查资料,它们分属扬子和华南两个构造单元的组成部分。该区的江—绍构造带经历了晋宁期、加里东期、印支期和燕山期多期造山作用。这对华南地壳演化的再认识,具有重要的地质意义。
The test results show that the 40Ar / 39Ar plateau of the muscovite in Tianrianshan Formation in Guangfeng County of Jiangxi Province is 1019 ± 0.9Ma, while the 40Ar / 39Ar plateau of biotite in the Youxiu Rock Formation The age was 501.2 ± 2.2Ma and the thermal event was 127Ma. They are two large-scale ductile shear zones that represent the age of their formation. This article also comprehensively analyzes the regional geological survey data, which belong to the two structural units of Yangtze and South China. The Jiang-Shao tectonic belt in this area experienced multiple orogenies during the Jinning, Caledonian, Indosinian and Yanshanian periods. This re-understanding of the evolution of South China crust has important geological significance.