Microbioliths of Late Ediacaran Qigebulak Formation in Tarim Basin, Xinjiang, China
塔里木盆地阿克苏地区晚埃迪卡拉世奇格布拉克组微生物岩石类型与形成环境
Reng-Yi Pei (裴礽奕)1 , Hong-Xia Jiang (姜红霞)1, Ying Li (李莹)2,3,4, Guo Yang (杨果)5*, Wen-Qing Pan (潘文庆)5, Yong-Quan Chen (陈永权)5
1 Hebei International Joint Research Center for Paleoanthropology, College of Earth Science,
Hebei GEO University, Shijiazhuang 050000, China.
2 Nanjing University, Nanjing 210000, Jiangsu, China.
3 University of Chinese Academy of Sciences, Beijing 100049, China.
4 Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China.
5 Research Institute of Petroleum Exploration and Development, Tarim Oilfield Company, Petrochina, Korla 841000, China.
*Corresponding author: Guo Yang. Email: yangguo-tlm@petrochina.com.cn
Abstract
The Late Ediacaran Qigebulak Formation at Sugaitebulak, Aksu area, western Tarim Basin, Xinjiang, China, is a classic section for study of reservoir of dolomitic microbioliths. Microscopic examination of thin sections shows that the main microbialites in the formation include laminites and thrombolites. The laminites have two types of fabrics: filamentous laminited and agglomerated laminited; The thrombolites have three types of fabrics: spheroid, worm-like and patchy clotted. Based on fabrics and comparison with modern microbialites, the formation environments of the Qigebulak Formation of the Sugaitbulak Formation consist of several subtidal to supratidal cycles. The main diagenesis of the microbialites includes recrystallization and dissolution. Different from previous studies, the rounded intraclasts of the microbialites are derived from the breaking of the microbialites.
Key words: Tarim basin, Ediacaran System, Qigebulak Formation, microbiolith, microbialite, laminate, thrombolite
Search words: bio-microbiolith, bio-microbialite, bio-thrombolite, e-microbiolith, e-microbialite, e-thrombolite
Funding: This study was supported by the National Natural Science Foundation of China (Grant No. 41972320) to Ya-Sheng Wu.
Cite it as: Pei, R.Y., Jiang, H.X., Li, Y., Yang, G., Pan, W.Q., Chen, Y.Q. 2024. Microbioliths of Late Ediacaran Qigebulak Formation in Tarim Basin, Xinjiang, China. Biopetrology, 4(1): 44- 64. https://biopetrology.com/moleqf