Portal de Periódicos da CAPES

Hydrocarbon-generating potential, depositional environments, and organisms of the Middle Permian Tarlong Formation in the Turpan-Hami Basin, northwestern China

2017; Geological Society of America; Volume: 129; Issue: 9-10 Linguagem: Inglês

10.1130/b31583.1

1943-2674

Jinqiang Tian, Jianzhang Liu, Zengbao Zhang, Fuyun Cong,

Geological Studies and Exploration

Research Article| June 23, 2017 Hydrocarbon-generating potential, depositional environments, and organisms of the Middle Permian Tarlong Formation in the Turpan-Hami Basin, northwestern China Jinqiang Tian; Jinqiang Tian † 1Key Laboratory of Tectonics and Petroleum Resources, Ministry of Education, China University of Geosciences, Wuhan 430074, China †jq.tian@hotmail.com Search for other works by this author on: GSW Google Scholar Jianzhang Liu; Jianzhang Liu 1Key Laboratory of Tectonics and Petroleum Resources, Ministry of Education, China University of Geosciences, Wuhan 430074, China Search for other works by this author on: GSW Google Scholar Zengbao Zhang; Zengbao Zhang 2Petroleum Exploration and Management Center, Shengli Oilfield Branch, Sinopec Group Company, Dongying 257017, China Search for other works by this author on: GSW Google Scholar Fuyun Cong Fuyun Cong 1Key Laboratory of Tectonics and Petroleum Resources, Ministry of Education, China University of Geosciences, Wuhan 430074, China Search for other works by this author on: GSW Google Scholar Author and Article Information Jinqiang Tian † 1Key Laboratory of Tectonics and Petroleum Resources, Ministry of Education, China University of Geosciences, Wuhan 430074, China Jianzhang Liu 1Key Laboratory of Tectonics and Petroleum Resources, Ministry of Education, China University of Geosciences, Wuhan 430074, China Zengbao Zhang 2Petroleum Exploration and Management Center, Shengli Oilfield Branch, Sinopec Group Company, Dongying 257017, China Fuyun Cong 1Key Laboratory of Tectonics and Petroleum Resources, Ministry of Education, China University of Geosciences, Wuhan 430074, China †jq.tian@hotmail.com Publisher: Geological Society of America Received: 24 May 2016 Revision Received: 26 Feb 2017 Accepted: 20 Apr 2017 First Online: 23 Jun 2017 Online Issn: 1943-2674 Print Issn: 0016-7606 © 2017 Geological Society of America GSA Bulletin (2017) 129 (9-10): 1252–1265. https://doi.org/10.1130/B31583.1 Article history Received: 24 May 2016 Revision Received: 26 Feb 2017 Accepted: 20 Apr 2017 First Online: 23 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Jinqiang Tian, Jianzhang Liu, Zengbao Zhang, Fuyun Cong; Hydrocarbon-generating potential, depositional environments, and organisms of the Middle Permian Tarlong Formation in the Turpan-Hami Basin, northwestern China. GSA Bulletin 2017;; 129 (9-10): 1252–1265. doi: https://doi.org/10.1130/B31583.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract The Middle Permian Tarlong Formation (P2t) source rocks in the Turpan-Hami Basin were studied based on multiple geochemical analyses on outcrop samples from the basin edges to reveal the hydrocarbon-generating potential, depositional environments, and organic composition. Due to long-term exposure to the surface, some outcrop source rock samples suffered weathering and displayed abnormally low S1 + S2, hydrogen indices, and H/C atomic ratios, and abnormally high Tmax and Ro values. Hopane and sterane biomarkers in these samples were almost unaffected by weathering and likely reflect real and unaltered values. After eliminating the effects of weathering, the P2t source rocks in the Turpan-Hami Basin were found to exhibit high hydrocarbon-generating potential and are dominated by good to excellent source rocks and by type II kerogens. The P2t source rocks in the Turpan-Hami Basin display low to medium pristane/phytane (Pr/Ph, <2.0), gammacerane/αβ C30 hopane, and C27 diasteranes/C27 steranes ratios; low C19 tricyclic terpane/C23 tricyclic terpane (<0.5) and C24 tetracyclic terpane/C26 tricyclic terpane (<2.0) ratios; medium 4-methylsteranes/ΣC29 sterane ratios; and high sterane/hopane ratios. These source rocks were deposited in a "balance-filled-lake" with minor or no terrestrial organic matter, significant algal input, especially freshwater to brackish water microalgae and acritarch organic matter input, and weakly alkaline, anoxic to suboxic brackish water. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.