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粒度统计分析方法在青藏高原隆升研究中的运用及效果--以昌马洪积扇为例
引用本文:李增,王云斌,梁明宏,徐景明,刘土改,王启航.粒度统计分析方法在青藏高原隆升研究中的运用及效果--以昌马洪积扇为例[J].西北地质,2005,38(3):16-20.
作者姓名:李增  王云斌  梁明宏  徐景明  刘土改  王启航
作者单位:1. 甘肃省地质调查院,甘肃,兰州,730000
2. 长安大学,陕西,西安,710054
3. 甘肃省地勘局第三地质矿产勘查院,甘肃,兰州,730050
基金项目:中国地质调查局1:25万玉门镇幅区调项目(编号200213000022)部分成果
摘    要:通过运用粒度统计方法对昌马洪积扇沉积物进行研究,结果显现自早更新世晚期以来存在7次沉积物粒度变粗事件,说明青藏高原东北缘自早更新世晚期以来发生了7次隆升,其间为稳定期.该结论与通过青藏高原东北缘盆地沉积分析、活动断裂及河流阶地活动时代对比而厘定的青藏高原东北缘构造活动时段基本一致,同时与整个青藏高原自早更新世晚期以来的隆升具有很好的耦合.由此为山前洪积扇研究提供了新的方法和线索。

关 键 词:昌马洪积扇  粒度统计方法  7次粒度变粗事件  青藏高原隆升
文章编号:1009-6248(2005)03-0016-05
收稿时间:2005-04-04
修稿时间:2005-06-14

Effect of the size statistics in studying the uplift of the Tibetan plateau
LI Zeng,WANG Yun-bin,LIANG Ming-hong,XU Jingi-ming,LIU Tu-gai,WANG Qi-hang.Effect of the size statistics in studying the uplift of the Tibetan plateau[J].Northwestern Geology,2005,38(3):16-20.
Authors:LI Zeng  WANG Yun-bin  LIANG Ming-hong  XU Jingi-ming  LIU Tu-gai  WANG Qi-hang
Abstract:After being studied by size statistics in Changma diluvial fan, the conclusion that sediments sizes were largened 7 times from Early Pleistocence was drawn. That is to say, the north-eastern margin of the Tibetan plateau has uplifted 7 times. The same conclusion also had been drawn by analysising the sediments of basin and active fault and the river terraces. They have the same active times with the Tibetan plateau uplift in sera. So, the size statistics given a new methed to study the diluvial.
Keywords:size statistics  7 times events of size largened  Changma diluvial fan  Tibetan plateau uplift
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