Article
Geosciences, Multidisciplinary
Zhang Shuichang, Su Jin, Wang Xiaomei, Ma Sihong
Summary: The Tarim Basin is the only petroliferous basin enriched with marine oil and gas in China. It is also the deepest basin for petroleum exploration and development in the world. The marine petroleum in the basin has a mixed source of two main sets of marine Source Rocks. The sedimentary environment plays an important role in the formation and accumulation of high-quality source rocks in the basin.
ACTA GEOLOGICA SINICA-ENGLISH EDITION
(2022)
Article
Geosciences, Multidisciplinary
Guangyou Zhu, Xi Li, Tingting Li, Lei Zhou, Yuxuan Wu, Bing Shen, Meng Ning
Summary: This study clarifies the mechanism of dolomite genesis in the Upper Sinian Qigebulake Formation and the Lower Cambrian Xiaoerbulake Formation in the Tarim Basin. It reveals that dolomite in the Xiaoerbulake Formation primarily originates from Early Cambrian marine fluid, while dolomite in the Qigebulake Formation is influenced by seawater, microorganisms, and sedimentary organic matter. The study also highlights the impact of different sources and fluid properties on the magnesium isotope composition of dolomite during the Sinian-Cambrian transition.
SCIENCE CHINA-EARTH SCIENCES
(2023)
Article
Geography, Physical
Chenlin Hu, Changcheng Han, Jinghui Ma, Wenfeng Wang, Fangyu Zhao, Wenxuan Sun
Summary: This study investigated the sedimentary differentiation and anisotropy of magnetic susceptibility (AMS) of the Tarim Carbonate Platform (TCP) in order to infer the paleowind directions during each epoch of the Cambrian-Ordovician and constrain its paleogeographic location. The results showed that the prevailing wind directions of the Early, Middle, and Late Cambrian were 226 degrees +/- 42 degrees, 207 degrees +/- 43 degrees, and 193 degrees +/- 36 degrees from present north, respectively, while those of the Early, Middle, and Late Ordovician were 178 degrees +/- 39 degrees, 165 degrees +/- 43 degrees, and 155 degrees +/- 52 degrees from present north, respectively.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Yinggang Zhang, Tao Yang, Robert J. Newton, Wenqing Pan, Yongquan Chen, Huiyang Yu
Summary: The Cambrian period was a critical time in Earth's history, with the rapid diversification of early animals and significant changes in oceanic conditions. In this study, carbonate sediments from the Xingdi section in the eastern Tarim Basin were used to investigate the carbon and strontium isotope stratigraphy during the Cambrian. The carbon isotope record showed similarities to global seawater carbon isotope variations, providing a viable stratigraphic framework for the Cambrian strata in this region.
JOURNAL OF ASIAN EARTH SCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Baiwen Huang, Shaonan Zhang, Ziye Lu, Ning Ye, Bei Zhu, Xiaoqi Ding, Yingtao Li
Summary: Through a combination of various tools, the study successfully identified the types and origins of dolomites in the Yingshan Formation of the Gucheng area in the Tarim Basin, including three primary matrix dolomites and three special cements. These dolomites were formed in different burial environments, with some influenced by hydrothermal fluid mixtures.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geochemistry & Geophysics
Hairuo Qing, Zhanfeng Qiao, Siyang Zhang, Jason Cosford, Anping Hu, Feng Liang, Yongsheng Wang, Jianfeng Zheng
Summary: Widespread replacement dolomite in the geologic record is characterized by different crystal sizes and shapes, which can be interpreted as either multistage dolomitization or recrystallization of precursor dolomite. This study used isotopes to investigate the crystal morphologies of Ordovician dolomites from the Tarim Basin, China. The results suggest that the dolomites were formed by the same dolomitizing fluid, and the variation in delta 18O values reflects the degree of recrystallization.
Article
Geosciences, Multidisciplinary
Lianqi Jia, Chunfang Cai, Jingong Zhang, Lijing Liu, Qingyong Luo, Kaikai Li
Summary: The study suggests that thermochemical sulfate reduction (TSR) occurs in carbonate reservoirs of Tarim Basin, with different geological settings of TSR reactions potentially resulting in varying effects on reservoir quality.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Guangyou Zhu, Tingting Li, Kun Zhao, Chao Li, Meng Cheng, Weiyan Chen, Huihui Yan, Zhiyao Zhang, Thomas J. Algeo
Summary: This study reports on the Mo isotopic compositions and iron speciation data of black shales from the Tarim block during the early Cambrian, providing insights into the paleoenvironment and oxygenation conditions in the ancient seawater.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2022)
Article
Geosciences, Multidisciplinary
Fei Huo, Xingzhi Wang, Luping Li, Xin Luo, Xiyan Yang, Chen Shen, Liang Li, Yunbo Ruan, Huiwen Huang
Summary: Based on the study of the Halahatang Area, this research reveals the sources and filling processes of Lower Paleozoic Ordovician oil and gas resources. The Cambrian source rocks are found to be the main contributors to Ordovician crude oil in this area, and the Ordovician natural gas exhibits typical characteristics of sapropelic gas. The accumulation process of oil and gas in the Ordovician reservoirs can be divided into three stages. The Middle-Late Caledonian period is the generation period of crude oil, the late Hercynian period is the main accumulation period, and the Himalayan period is dominated by dry gas filling.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Yaxin Shang, Keyu Liu, Zhiqian Gao, Chenjia Zhang, Ziyi Wang
Summary: The subdivision and correlation of the Cambrian System, especially in the Tarim Basin, have long been controversial due to incomplete biostratigraphy. However, by using carbon isotopes and sedimentary characteristics, a reliable isotope stratigraphic marker has been identified to identify the T-8(1) boundary in the western Tarim Basin.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Wang Huajian, Su Jin, Wang Xiaomei, Ye Yuntao, Wang Yu, Fang Yu, Zhang Shuichang
Summary: This study presents an integrated profile of carbonate and organic carbon isotopic values from well cuttings in the Tarim Basin, providing insights into the division and boundaries of the Cambrian System. The results suggest the presence of three carbon isotope anomalies and propose boundaries for the four series of the Cambrian System. The identified anomalies and boundaries are consistent with previous biostratigraphic evidence and division scheme, indicating their reliability. Furthermore, the study suggests a possible relationship between abnormal carbon cycle perturbations and organic carbon burials during specific events and a huge dissolved organic carbon reservoir in the ancient Tarim Basin.
ACTA GEOLOGICA SINICA-ENGLISH EDITION
(2022)
Article
Energy & Fuels
Yini Liu, Mingyi Hu, Sun Zhang
Summary: Based on drilling cores, thin sections, and 3D seismic data, this study investigates the types, features, and evolution processes of Cambrian-Ordovician carbonate platforms in the Gucheng and Xiaotang areas. It identifies two types of carbonate platforms, namely carbonate ramp and rimmed platforms, and reveals the different evolution processes in the two areas. The study also discusses favorable exploration zones in this area.
PETROLEUM EXPLORATION AND DEVELOPMENT
(2022)
Article
Energy & Fuels
Ruixin Guo, Shaonan Zhang, Kun Wang, Meimei Han, Xiaoqi Ding
Summary: The dolomitization of the thick carbonates in the Gucheng uplift in northwestern China has led to the formation of massive dolomite reservoirs. Different dolomite types formed under varied conditions, influencing their mineral compositions and porosity, which in turn affect the geological characteristics and oil and gas exploration in the area.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Geosciences, Multidisciplinary
Hongliu Zeng, Zhaohui Xu, Wei Liu, Xavier Janson, Qilong Fu
Summary: An enhanced interpretation workflow was developed to improve facies interpretation in ultradeep, high-velocity carbonate rocks using low-frequency seismic data. Different geomorphologies, facies, and environments were identified, and a new sediment transport mechanism was proposed.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Xiaoqun Yang, Zhong Li, Tailiang Fan, Zhiqian Gao, Shuai Tang
Summary: Guided by conodont biostratigraphy and field observations of unconformities, stable carbon isotopic analysis was conducted on Lower-Middle Ordovician sections in the Tarim Basin. The delta C-13 trend in these sections shows three distinct characteristics corresponding to different stages, reflecting variations in local factors and global signals.
GEOLOGICAL MAGAZINE
(2021)
