摘要
通过对环西藏佩枯错的T1—T16湖积阶地中湖相沉积的野外地质调查和实测剖面,对分布于盆地内的第四纪早更新世—全新世湖相地层进行了详细的研究和划分,重新厘定了该区早更新世—全新世的岩石地层单元,确立了生物地层和年代地层序列。首次建立了青藏高原第四纪早更新世—全新世湖相地层单位——佩枯错群(QP),佩枯错群由第四系下更新统拉洋组(Qp1l)、中更新统茫家冻组(Qp2m)、上更新统帮荣组(Qp3b)和全新统罗马仁布组(Qhl)4个组组成。为青藏高原湖泊演化、气候变化、古地理变迁的研究,以及第四纪地层的划分与对比等提供了新资料。
The Quaternary early Pleistocene-Holocene lacustrine strata in the Paiku Co basin, Tibet, were studied and divided intensively, the early Pleistocene-Holocene lithostratigraphic units were redefined and the biostratigraphic and chronostratigraphic sequences were determined through field geological survey and stratigraphic sections of lacustrine strata in lacustrine terraces T1-T16 around the Paiku Co basin. The Paiku Co Group-a Quaternary early Pleistocene-Holocene lacustrine stratigraphic unit--was established for the first time. This group consists of the lower Pleistocene Layang Formation, middle Pleistocene Mangjiadong Formation, upper Pleistocene Bangrong Formation and Holocene Luomarenbu Formation. This research provides new data for the study of lake evolution, climatic variations and paleogeographic changes, as well as the stratigraphic division and correlation of the Quaternary on the QinghaiTibet Plateau.
出处
《地质通报》
CAS
CSCD
北大核心
2008年第7期1035-1043,共9页
Geological Bulletin of China
基金
中国地质调查局项目《青藏高原新构造及晚新生代古大湖研究》(编号:基[2006]001-08
工作项目编码:1212010610108)
《青藏高原第三纪重点古湖泊环境演变序列》(编号:科[2005]005-02
工作项目编码:1212010511902)
国家自然科学基金项目(编号:40572134)共同资助
