Upper Jurassic–Lower Cretaceous stratigraphy in south-eastern Tibet: a comparison with the western Himalayas
- 作者：Xiumian Hu ; Luba Jansa ; Chengshan Wang
- 关键词：Stratigraphy ; South-eastern Tibet ; Tethys Himalaya ; Lower Cretaceous ; Upper Jurassic
- 刊名：Cretaceous Research
- 出版年：2008
- 期刊代码：114_01956671
- 类别：abs
- 出版时间：April 2008
- 卷：29
- 期：2
- 页码：301-315
- 文件大小：1985 K
摘要
Lithostratigraphic studies of the Upper Jurassic–Lower Cretaceous sedimentary successions exposed in the Tingri–Gyangze area, south-eastern Tibet resulted in the establishment of a revised stratigraphic framework. A major crustal fault separates the southern Tibetan sedimentary successions into a Southern Zone and a Northern Zone. The Upper Jurassic–Lower Cretaceous strata of the Southern Zone are subdivided into the Menkadun Formation (Oxfordian, Kimmeridgian, up to lower Upper Tithonian), the Gucuo Formation (Upper Tithonian to Lower Albian) and the overlying Dongshan Formation (Upper Albian). The Gucuo Formation is further subdivided into a quartz arenite unit, which is overlain by a shale unit, in turn overlain by a volcaniclastic sandstone unit. The youngest cluster of detrital zircon absolute age data (127.7 ± 1.8 Ma) from the lower part of the volcaniclastic unit of the Gucuo Formation place the volcanic event before the Late Barremian.