Dawsonite formation in the Beier Sag,Hailar Basin,NE China tuff: A natural analog for mineral carbon storage |
| |
| Affiliation: | 1. College of Earth Science, Jilin University, 130061 Changchun, China;2. GET/CNRS, 14 Avenue Édouard Belin, 31400 Toulouse, France;3. Daqing Exploration & Development Institute, 163000 Daqing, China;1. State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing 102249, China;2. PetroChina Tuha Oilfield Company, Hami 839009, China;1. School of Geoscience, China University of Petroleum, Qingdao, Shandong 266580, China;2. Research Institute of Exploration and Development, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China;1. State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, Jiangsu, China;2. College of Material Engineering, Jinling Institute of Technology, Nanjing 211169, China;1. State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing 102249, China;2. PetroChina Turpan-Hami Oilfield Company, Xinjiang 839009, China;1. School of Geosciences, China University of Petroleum, Qingdao, Shandong 266580, China;2. Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China;3. Department of Geosciences, University of Oslo, P.O. Box 1047, Blindern, 0316 Oslo, Norway;4. Research Institute of Petroleum Exploration & Development, Beijing 100083, China;5. The University Centre in Svalbard (UNIS), Pb. 156, 9171 Longyearbyen, Norway |
| |
| Abstract: | We determined the rock types, the authigenic minerals, the paragenetic sequence, and the origin of dawsonite in pyroclastic rocks from the Yimin Formation of Beier Sag in the Hailar Basin, China. Dawsonite, a diagenetic mineral, is thought to result from a large influx of CO2 and, therefore, this system represents a natural analogue for in-situ mineral carbon storage. The studied host rocks are mainly tuffs/tuffaceous sandstones which now contain up to 70 vol% authigenic carbonates, including dawsonite, ankerite, and siderite. The initial alteration of the tuffs yielded minor siderite. Kaolinite, illite and mixed illite/smectite then formed as product phases. Dawsonite and quartz subsequently precipitated in response to CO2 influx apparently coupled to feldspar and perhaps kaolinte dissolution. Dawsonite reaches a maximum 25 vol% of the bulk rock. Mass balance suggests that this CO2 influx was coupled to the external import of sodium and export of SiO2. Ankerite and additional siderite precipitated during the late-stage alkaline diagenesis. The carbon isotope values of the dawsonite are in the range −4.1‰ to −2.2‰, indicating the magmatic origin of the CO2. Vitrinite reflectance and thermal gradient constraints suggest that the dawsonite at this location formed at a temperature of ∼75 °C. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
