Late Holocene Climatical and Environmental Evolutions Inferred from Mineralogical Records in Selin Co, Central Qinghai-Tibetan Plateau

  • LIN Yongjie ,
  • ZHENG Mianping ,
  • WANG Hailei
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  • 1. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China;
    2. MLR Key Laboratory of Saline Lake Resources and Environment; Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China

Received date: 2014-09-15

  Revised date: 2014-10-31

  Online published: 2014-12-25

Abstract

The X-ray diffraction (XRD) analysis of the core SL-1, collected from Selin Co, the climate sensitive regions in the central Qinghai-Tibetan Plateau, reveals that the minerals in the core mainly include aragonite, calcite , hydromagnesite, dolomite, gypsum and clastic materials such as quartz, muscovite, chlorite, feldspar, etc.. Based on the mineralogy of the sediments, three climate evolution stages are identified in Selin Co area since 5090 a BP, i.e. , 5090-2900 a BP; 2900-1135 a BP; 1135-0 a BP. The climate was changed from cool dry at 5090-2900 a BP to cold dry 1135 a BP-present, with a transition during 2900-1135 a BP. Meanwhile, several cold events are also retrieved in the late Holocene, according to the accumulation of hydromagnesite in the lower part of the core.

Cite this article

LIN Yongjie , ZHENG Mianping , WANG Hailei . Late Holocene Climatical and Environmental Evolutions Inferred from Mineralogical Records in Selin Co, Central Qinghai-Tibetan Plateau[J]. Science & Technology Review, 2014 , 32(35) : 35 -40 . DOI: 10.3981/j.issn.1000-7857.2014.35.004

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