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贵州安顺新民二叠系—三叠系界线剖面磁化率变化及古气候环境意义

贵州安顺新民二叠系—三叠系界线剖面磁化率变化及古气候环境意义[J]. 沉积学报, 2012, 30(5): 817-824.
引用本文: 贵州安顺新民二叠系—三叠系界线剖面磁化率变化及古气候环境意义[J]. 沉积学报, 2012, 30(5): 817-824.
Variations of the Magnetic Susceptibility across the PT Boundary at Xinmin Section in Anshun, Guizhou and Their Paleoclimatic Implications[J]. Acta Sedimentologica Sinica, 2012, 30(5): 817-824.
Citation: Variations of the Magnetic Susceptibility across the PT Boundary at Xinmin Section in Anshun, Guizhou and Their Paleoclimatic Implications[J]. Acta Sedimentologica Sinica, 2012, 30(5): 817-824.

贵州安顺新民二叠系—三叠系界线剖面磁化率变化及古气候环境意义

详细信息
  • 中图分类号: P512.2

Variations of the Magnetic Susceptibility across the PT Boundary at Xinmin Section in Anshun, Guizhou and Their Paleoclimatic Implications

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出版历程
  • 刊出日期:  2012-10-10

目录

    贵州安顺新民二叠系—三叠系界线剖面磁化率变化及古气候环境意义

    • 中图分类号: P512.2

    摘要: 贵州安顺新民二叠系—三叠系界线剖面磁化率测试结果表明,该剖面二叠系磁化率整体偏低(平均6.4×10-8 m3/kg),界线之上磁化率快速增加并相对稳定在1.3×10-7 m3/kg附近,与华南其他二叠系—三叠系剖面磁化率变化趋势相同;与陆源孢粉丰度、TiO2曲线的同步变化趋势表明,新民剖面磁化率主要来自陆源物质。结合磁化率、地球化学指标的变化特征,将源区P—T之交古气候划分为3个阶段:阶段Ⅰ(12层中部)为化学风化作用较强的温暖潮湿的气候条件;阶段Ⅱ(2层上部P—T界线)整体处于较强化学风化作用条件下温热潮湿的气候环境,变化较为频繁,表现为温润/湿热交替;阶段Ⅲ(P—T界线之上)物理风化加强,化学风化明显减弱,经短暂“过渡段”,气候总体转变为干热的条件。

    English Abstract

    贵州安顺新民二叠系—三叠系界线剖面磁化率变化及古气候环境意义[J]. 沉积学报, 2012, 30(5): 817-824.
    引用本文: 贵州安顺新民二叠系—三叠系界线剖面磁化率变化及古气候环境意义[J]. 沉积学报, 2012, 30(5): 817-824.
    Variations of the Magnetic Susceptibility across the PT Boundary at Xinmin Section in Anshun, Guizhou and Their Paleoclimatic Implications[J]. Acta Sedimentologica Sinica, 2012, 30(5): 817-824.
    Citation: Variations of the Magnetic Susceptibility across the PT Boundary at Xinmin Section in Anshun, Guizhou and Their Paleoclimatic Implications[J]. Acta Sedimentologica Sinica, 2012, 30(5): 817-824.

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