New Results and Major Progresses in Regional Survey of the Darlag-Jigzhi Sheets
详细信息
- 责任者：Yang Xinde (Institute of Geomechanics ; Chinese Academy of Geological Sciences ; Beijing 100081 ; China) ; Yan Xili
- 刊名：Journal of Geomechanics
- 出版年：2011
- 卷期：17(1)
- 关键词：盆地 ; basins ; 隆起 ; uplifts ; 青海 ; Qinghai Province
- 页码：p.79-90
- 图表：5 illus., 1 table, 5 refs.
- 分类号：0300
- issnNo：ISSN1006-6616
- isbnNo：CN11-3672/P
摘要
The major progress and achievements obtained in the geological survey within the extent of the 1∶ 250 000 Darlag and Jigzhi Sheets include: 1) established the stratigraphical framework of the Bayan har Group and made a detailed analysis of the basin sedimentary filling sequences and the tectonic setting discrimination; 2) summarized the major types of basic sequences; 3) the depositional cycles and sea level variations of the Bayan har Basin are as same as that of southern Tibet and the Salt Range of Pakistan; 4) the deep water tempestite was recently discovered in Triassic flysch sediments; 5) the old age information of zircons from the Triassic granitoids shows that exists a “rigid basement” under the Bayan har Basin; and 6) three tenacity brittleness shearing belt have been discovered in this area. The uplift history of Qinghai-Tibetan Plateau is discussed and made a detailed environmental geology study on the Project of South-North Water Transfer.