Age assignment of dolomite in palaeo-reservoirsof the Qiangtang Basin: New evidence from palaeontology and carbonate in situ U-Pb dating
文献类型：期刊论文
| 作者 | Zhang, Jian7,8,9,10; Wang, Jian5,6,7; Zheng, Bo5,6,7; Sheng, Qingyi4; Wei, Hengye5,6,7; Shen, Lijun5,6,7; Xiong, Shaoyun2,3; Mansour, Ahmed1,5,6,7 |
| 刊名 | MARINE AND PETROLEUM GEOLOGY
 |
| 出版日期 | 2023-12-01 |
| 卷号 | 158页码:18 |
| ISSN号 | 0264-8172 |
| 关键词 | Late Triassic-Middle jurassic Foraminifer biostratigraphy Carbonate U -Pb geochronology Dolomite in palaeo-reservoir South Qiangtang depression |
| DOI | 10.1016/j.marpetgeo.2023.106545 |
| 通讯作者 | Wang, Jian(w1962jian@163.com) ; Zheng, Bo(cambrianzb@foxmail.com) |
| 英文摘要 | The dolostone in the south Qiangtang depression has been proven to be a favourable reservoir rock of the famous Longeni-Angdaerco palaeo-reservoir, being of great significance for oil and gas exploration in the Qiangtang basin. However, its geochronology and diagenetic process are still controversial. In particular, the previous interpretation that oil-bearing dolostone belongs to the Middle Jurassic Buqu Formation is challenged by recent works. Based on previous macro-palaeontological studies, we carried out the latest micro-palaeontological identification and carbonate in-situ U-Pb isotope dating analysis to re-assign the depositional age of the dolomite in the palaeo-reservoirs. We also establish a high-resolution diagenetic time framework of dolomite combined with microscopic identification, scanning electron microscope, and rare earth elements analysis. In this study, age-diagnostic foraminifers, which include Lituolipora termieri, Siphovalvulina colomi, Siphovalvulina variabilis, Siphovalvulina gibraltarensis, Duotaxis metula, and Variostoma sp., were recovered from the overlying and underlying limestone sequences of the studied Xiaogaxiaona palaeo-reservoir section. These foraminiferal assemblages suggest a Late Triassic to Early Jurassic age of the carbonate sequences. Nine U-Pb ages of different carbonate components were obtained. Contrary to previous dolomitization models, U-Pb dating suggests a Late Triassic metasomatic dolomitization event (216.2 +/- 6.1 Ma to 210.1 +/- 9.4 Ma), which was likely driven by seawater fluids. This event was probably followed by calcite vein cementation (U-Pb ages of 203 +/- 13 Ma). Another Early Jurassic dolomitization event (185.5 +/- 3.8 Ma to 182.7 +/- 5.8 Ma) perhaps involved the mixedzone model. Finally, saddle dolomite cement yielded Early and Middle Jurassic ages of 181 +/- 18 Ma and 161 +/- 23 Ma and crystallized in pre-existing vugs, representing two hydrothermal fluid events. This study suggests that the palaeo-reservoir carbonate successions were probably deposited in the Late Triassic rather than the previous suggestion of the Middle Jurassic. The high-resolution time framework of the dolostone in the palaeoreservoir reveals a possible link between dolomitization and hydrocarbon accumulation in basin-scale fluid-flow events in the Qiangtang Basin. |
| WOS关键词 | RARE-EARTH-ELEMENTS ; PETROLEUM GEOLOGY ; EVOLUTION ; SEAWATER ; TIBET ; BIOSTRATIGRAPHY ; GEOCHRONOLOGY ; SYSTEMATICS ; CEMENTS ; ORIGIN |
| 资助项目 | National Natural Science Foundation of China[42241202] ; National Natural Science Foundation of China[91955204] ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP)[2019QZKK080301] ; The 14th Five -Year Prospective and Basic Research Project of Petro China[2021DJ0801] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCI LTD |
| WOS记录号 | WOS:001116594200001 |
| 资助机构 | National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; The 14th Five -Year Prospective and Basic Research Project of Petro China |
| 源URL | [http://ir.nigpas.ac.cn/handle/332004/42773]  |
| 专题 | 中国科学院南京地质古生物研究所 |
| 通讯作者 | Wang, Jian; Zheng, Bo |
| 作者单位 | 1.Minia Univ, Fac Sci, Geol Dept, Menia 61519, Egypt 2.Petrochina Hangzhou Res Inst Geol, Hangzhou 310023, Peoples R China 3.China Natl Petr Corp, Key Lab Carbonate Reservoirs, Hangzhou 310023, Peoples R China 4.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Peoples R China 5.Southwest Petr Univ, Qiangtang Inst Sedimentary Basin, Chengdu 610500, Sichuan, Peoples R China 6.Southwest Petr Univ, Sch Geosci & Technol, Chengdu 610500, Peoples R China 7.Southwest Petr Univ, Natl Key Lab Oil & Gas Reservoir Geol & Exploitat, Chengdu 610500, Sichuan, Peoples R China 8.Chengdu Ctr China Geol Survey, Chengdu 610081, Sichuan, Peoples R China 9.China Univ Geosci, Beijing 100083, Peoples R China 10.Chinese Acad Geol Sci, Beijing 100091, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Jian,Wang, Jian,Zheng, Bo,et al. Age assignment of dolomite in palaeo-reservoirsof the Qiangtang Basin: New evidence from palaeontology and carbonate in situ U-Pb dating[J]. MARINE AND PETROLEUM GEOLOGY,2023,158:18. |
| APA | Zhang, Jian.,Wang, Jian.,Zheng, Bo.,Sheng, Qingyi.,Wei, Hengye.,...&Mansour, Ahmed.(2023).Age assignment of dolomite in palaeo-reservoirsof the Qiangtang Basin: New evidence from palaeontology and carbonate in situ U-Pb dating.MARINE AND PETROLEUM GEOLOGY,158,18. |
| MLA | Zhang, Jian,et al."Age assignment of dolomite in palaeo-reservoirsof the Qiangtang Basin: New evidence from palaeontology and carbonate in situ U-Pb dating".MARINE AND PETROLEUM GEOLOGY 158(2023):18. |
入库方式： OAI收割
来源：南京地质古生物研究所
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