云南鹤庆盆地HQ孔沉积特征与古环境变迁

收稿日期: 1998-07-10

刊出日期: 1998-08-28

SEDIMENTARY CHARACTERISTICS AND CLIMATIC EVOLUTION OF CORE HQ IN HEQING BASIN YUNNAN PROVINCE

Received Date: 10 July 1998

Publish Date: 28 August 1998

摘要: 本文依据沉积物的颜色、粒度、层理、岩性组合等特征,并参照磁性地层、磁化率、碳酸盐含量、总有机碳及碳氮比值等环境指标,初步建立云南鹤庆盆地约600ka B P以来的古环境演化历史。研究表明,在大阶段上环境变化存在着两次明显的转型,这可能是与构造运动驱动有关。在剖面4.1m处,约14.2ka B P,湖盆被河流切开,导致环境指标突变。
- HQ孔 /
- 沉积特征 /
- 古环境变迁
Abstract: The environment evolution history of the Heqing Basin since 600 ka B P has been established based on the analysis of the colour,granularity,stratification and lithological assemblage of the sediments from the HQ core in combination with the study of the magnetic stratigraphy,susceptibility,content of carbonates,total organic carbon and the carbonlnitrogen ration of the sequence.There were two distinet tranformations of the enviroment connected to the tectonic movement.At a depth of 4.1m of the column,the lake basin was entrenched by rivers at about 14.2 ka B P,leading to a sudden change of the envionment.
- HQ core /
- sedimentary characteristics /
- palaeoenvironment evolution