| 柴达木盆地3万年左右Ilyocyprisinermis灭绝事件及其古环境意义 |
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| 引用本文： | 景民昌,孙镇城,李东明,杨革联,杨平.柴达木盆地3万年左右Ilyocyprisinermis灭绝事件及其古环境意义[J].现代地质,2001,15(1):49-52. |
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| 作者姓名： | 景民昌 孙镇城 李东明 杨革联 杨平 |
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| 作者单位： | 1. 石油大学 地球科学系,
2. 青海油田勘探开发研究院, |
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| 摘 要： | 柴达木盆地东南部的达参 1井 4 6 m处 ,介形类 Ilyocyprisinermis突然大量灭绝 ,使得介形类总体丰度大大减少 ,介形类生态组合也发生了明显的变化。该事件称为 Ilyocypris inermis灭绝事件 ,其年限约为 3万 a左右 ,具有十分重要的古环境意义。它是更新世晚期全球气候急剧恶化在柴达木盆地的反映 ,证明了柴达木盆地气候演化和全球气候具有同步性 ;另一方面 ,也为 3万 a左右青藏高原的隆升提供了微古生物方面的证据
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| 关 键 词： | 古环境 介形类 生物事件 柴达木盆地 |
| 文章编号： | 1000-8527(2001)01-0049-04 |
| 修稿时间： | 2000年9月22日 |
ILYOCYPRIS INERMIS
EXTINCTION EVENT AND IT'S PALAEO-ENVIRONMENT SIGNIFICANCE IN THE QAIDAM BASIN AT ABOUT
30KA B.P. |
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| JING Min chang ,SUN Zhen cheng ,LI Dong ming ,YANG Ge lian ,YANG Ping.ILYOCYPRIS INERMIS
EXTINCTION EVENT AND IT''''S PALAEO-ENVIRONMENT SIGNIFICANCE IN THE QAIDAM BASIN AT ABOUT
30KA B.P.[J].Geoscience——Journal of Graduate School,China University of Geosciences,2001,15(1):49-52. |
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| Authors: | JING Min chang SUN Zhen cheng LI Dong ming YANG Ge lian YANG Ping |
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| Institution: | JING Min chang 1,SUN Zhen cheng 1,LI Dong ming 1,YANG Ge lian 1,YANG Ping 2 |
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| Abstract: | The deposits of the Qaidam Basin are abundant in microfossils,especially in Ostracoda.Dacan 1 well,in the southeast basin,is a core that drilled through Quaternary.At the 46th meter of the core, Ilyocypris inermis ,one of the two primary Ostracoda in the well,suddenly extincted,causing the rapid decrease of Ostracoda abundance and the change of ecological assemblages.This biology event was named as Ilyocypris inermis Extinction Event and it's geological age was about 30 ka B.P..In the Late Pleistocene the global climate became extremely worsen. Ilyocypris inermis extinction event reflected this global uncomfortable climate situation in the Qaidam Basin and proved that the evolution of the Qaidam Basin climate was same as that of global climate at some time.This biological event was also related with the rapid uplift of Qinghai Tibet Plateau at about 30 ka B.P..The rapid uplift of Qinghai Xizang Plateau resulted in the extremely dry climate,which was the primary reason of the extinction of Ostracoda. |
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| Keywords: | palaeoenvironment Ostracoda biology event the Qaidam Basin |
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