| PDF: | |
| Time: | 2006 |
| Journal: | Xinjiang Geology |
| Volumn: | 24 |
| Issue: | 4 |
| Pages: | 369-372 |
| Type: | Other |
| Author: | Xuefeng Bai,Wanzhu Liu,Rihui Cheng,Pujun Wang,Youfeng Gao |
Abstract: | Carbonate platform sediments have been widely developed in the Ordovician in the Kuruketage region of the Tarim basin but because of the turbulence environment the types of carbonate are mainly micritic intraclast and bioclasts and breaking oolites.As part of a systemic study on the development and evolution of carbonates in this district,this study analyzes the carbonate assembled types and microfeatures and makes the following conclusions regarding the lithological characteristics: ① the oolites and bic lasts in carbonates which were deposited after transportation were not the outcome of the original ooidal and biltic shoal.② The carbonate and terrigenous fragmentary rocks were mixed and the interbedded deposition from the bottom to the top shows the thickness of carbonates is thinner while the terrigenous sediment is thicker.③ Gravity current sediments were found in the carbonate deposition environment.These conclusions show that the depositional environment of carbonate platform in the Ordovician was unstable |