Classification and Correlation of Silurian of Well TP2 in Shaya Rise, Tarim Basin
详细信息
- 责任者：Cai XiYao(Research Institute of Exploration & Production ; SINOPEC ; Beijing 100083 ; China) ; Dou LiWei
- 刊名：Acta Petrologica Sinica
- 出版年：2012
- 卷期：28(8)
- 关键词：志留纪 ; Silurian ; 塔里木盆地 ; Tarim Basin
- 页码：p.2584-2590
- 图表：illus.,1 table,28 refs.
- 分类号：1200
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
The Silurian in the Well TP2 of Shaya Rise in the Tarim Basin did not develop fully, only with the Kalpintag Formation and Tataaiertag Formation in the Llandovery. Kalpintag Fm. was divided into three members, the upper and lower was named as the sandstone members, the middle as the mudstone one, with the grey and grey-green. Tataaiertag Fm. consists of brown and brown-red fine sandstone intercalated mudstone. A plentiful of fossils of graptolites, chitinozoans and aritarches were yielded in the middle and lower members of Kalpintag Fm., and space-time distribution of the fossils were detailedly discussed. According to the characteristics of the biota, they were lied into three fossil assemblages (zones), Parakidograptus acuminatus, Belonechitina cf. postrobusta-Spinachitina sp. nov. and Dactylofusa cabottii-Cymatiosphaera densisepta-Leiosphaeridia. The many kinds of the fossil basises are firstly provided for the division and correlation of the Kalpintag Fm., with the one of the main exploring aims. Silurian in Well TP2 was divided into one Second-order sequence, four Third-orders. The top and bottom margins of the Second-order are unconformity T60 and T70, with fair characteristics of truncate and onlap in the seismic sections. Based on the researches of biostratigraphy, lithostratigraphy, logging stratigraphy and sequence stratigraphy in Well TP2, new stipulation of stratigraphic succession and formations and members of Silurian was made. It had been achieved that the classific standard of the lower member of Kalpintag Fm. and Sangtamu Fm. of Upper Ordovician in the areal coverage of Tarim Basin.