地质论评2012，Vol.58Issue(3)：553-564,12.
柴达木盆地大浪滩梁-ZK02孔的磁性地层及其古环境研究
Magnetostratigraphy of Liang-ZK02 Borehole in Dalangtan, Qaidam Basin and Its Paleoenvironmental Significance
摘要
Abstract
A detailed magnetostratigraphic investigation has been carried out on a 1000-m-thick sequence of Liang-ZK02 Borehole in Dalangtan, northwest of the Qaidam Basin. Magnetostratigraphic results show that the B-M boundary of borehole is located in 315m, Jaramillo subchron and Olduvai subchron are located in 405 ~430m and 772 ~816m, respectively. Three large environmental changes in Quaternary, occurred around 2.5 ~ 2. 2Ma, 1. 2 ~0. 7Ma and 0.4Ma, are identified based on integrated analysis of evaporites, clastic rock and sporo-pollen record. The uplift of Xizang ( Tibetan) Plateau was probably the main reason for these environmental changes, paleoclimate of Qaidam Basin transferred from cool, wet climate to cold, dry climate in the end of Early Pleistocene to early Middle Pleistocene because of the uplift of the Xizang( Tibetan) Plateau. The trend of aridification caused by uplift is not intensified gradually, the climate became wetter in humid period since the end of Early Pleistocene, which might result from intensified strength of summer monsoon caused through uplift of Xizang(Tibetan) Plateau, where the glacier and snow covered areas increased.关键词
柴达木大浪滩/磁性地层/青藏高原隆升/环境变化Key words
Dalangtan, Qaidam Basin/ magnetostratigraphy/ uplift of Xizang ( Tibetan) Plateau/ environmental change引用本文复制引用
秦永鹏,侯献华,郑绵平,杨振宇,李洪普,施林峰..柴达木盆地大浪滩梁-ZK02孔的磁性地层及其古环境研究[J].地质论评,2012,58(3):553-564,12.基金项目
本文为中国地质调查局地质大调查项目(编号1212010818057、1212010011806(M1003))的成果. （编号1212010818057、1212010011806(M1003）
