Investigation of geothermal structure of the Sulawesi, using gravity and magnetic method
文献类型：期刊论文
| 作者 | Zhang, Jian2; Hao, Tianyao1,2; Dong, Miao2; Xu, Ya1,2; Wang, Beiyu2; Ai, Yifei2; Fang, Gui2 |
| 刊名 | SCIENCE CHINA-EARTH SCIENCES
 |
| 出版日期 | 2020-10-23 |
| 页码 | 16 |
| 关键词 | Sulawesi Sea and Sulawesi Island Gravity and geothermal gradient Thermal crust Moho and Curie point depth Subduction retreat and sinistral strike-slip |
| ISSN号 | 1674-7313 |
| DOI | 10.1007/s11430-020-9659-3 |
| 英文摘要 | The Sulawesi Sea and Sulawesi Island are located in the western Pacific area where volcanic activity, plate subduction, and seismic activity are very active. The Sulawesi basin formed during the Middle Eocene-Late Eocene and nearly half of the Eocene oceanic crust has subducted below the North Sulawesi Trench. The Sulawesi Island was spliced and finalized in the Early Pliocene-Pleistocene during volcanic activity and is recently very active. This area is an optimal location to study volcanic geothermal conditions and subduction initiation mechanisms in the southern part of the western Pacific plate margin, which are important in geothermal and geodynamic research. In this study, we combined 133 heat flow data with gravity and magnetic data to calculate the Moho structure and Curie point depth of the Sulawesi Sea and periphery of the Sulawesi Island, and analyze the distribution characteristics of the geothermal gradient and thermal conductivity. The results show that the average depths of the Moho and Curie surfaces in this area are 18.4 and 14.3 km, respectively, which is consistent with the crustal velocity layer structure in the Sulawesi Basin previously determined by seismic refraction. The average geothermal gradient is 4.96 degrees C (100 m)(-1). The oceanic area shows a high geothermal gradient and low thermal conductivity, whereas the land area shows a low geothermal gradient and high thermal conductivity, both of which are consistent with statistical results of the geothermal gradient at the measured heat flow points. The highest geothermal gradient zone occurs in the transition zone from the Sulawesi Sea to Sulawesi Island, corresponding to the spreading ridge of the southward-moving Sulawesi Basin. Comprehensive gravity, magnetic, and geothermal studies have shown a high crustal geothermal gradient in the study area, which is conducive to the subduction initiation. The northern part of the Palu-koro fault on the western side of Sulawesi is likely the location where subduction initiation is occurring. During the process of moving northwest, the northern and eastern branches of Sulawesi Island have different speeds; the former is slow and the latter is fast. These branches also show different deep tectonic dynamic directions; the northern branch tilts north-up and the eastern branch tilts north-down. |
| WOS关键词 | THERMAL STRUCTURE ; PLATE-TECTONICS ; HEAT-FLOW ; METAMORPHIC COMPLEX ; NW SULAWESI ; EVOLUTION ; SEA ; INDONESIA ; ARC ; CONSTRAINTS |
| 资助项目 | National Natural Science Foundation of China Key Project "3D Seismic Observation and Plate Activity Mechanism of the Double Subduction System in the Sulawesi Sea"[91858212] ; National Natural Science Foundation of China[41906056] ; National Natural Science Foundation of China[U1701245] ; Strategic Pilot Science and Technology Project of Chinese Academy of Sciences[XDB42020104] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000583936700001 |
| 出版者 | SCIENCE PRESS |
| 资助机构 | National Natural Science Foundation of China Key Project "3D Seismic Observation and Plate Activity Mechanism of the Double Subduction System in the Sulawesi Sea" ; National Natural Science Foundation of China Key Project "3D Seismic Observation and Plate Activity Mechanism of the Double Subduction System in the Sulawesi Sea" ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Pilot Science and Technology Project of Chinese Academy of Sciences ; Strategic Pilot Science and Technology Project of Chinese Academy of Sciences ; National Natural Science Foundation of China Key Project "3D Seismic Observation and Plate Activity Mechanism of the Double Subduction System in the Sulawesi Sea" ; National Natural Science Foundation of China Key Project "3D Seismic Observation and Plate Activity Mechanism of the Double Subduction System in the Sulawesi Sea" ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Pilot Science and Technology Project of Chinese Academy of Sciences ; Strategic Pilot Science and Technology Project of Chinese Academy of Sciences ; National Natural Science Foundation of China Key Project "3D Seismic Observation and Plate Activity Mechanism of the Double Subduction System in the Sulawesi Sea" ; National Natural Science Foundation of China Key Project "3D Seismic Observation and Plate Activity Mechanism of the Double Subduction System in the Sulawesi Sea" ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Pilot Science and Technology Project of Chinese Academy of Sciences ; Strategic Pilot Science and Technology Project of Chinese Academy of Sciences ; National Natural Science Foundation of China Key Project "3D Seismic Observation and Plate Activity Mechanism of the Double Subduction System in the Sulawesi Sea" ; National Natural Science Foundation of China Key Project "3D Seismic Observation and Plate Activity Mechanism of the Double Subduction System in the Sulawesi Sea" ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Pilot Science and Technology Project of Chinese Academy of Sciences ; Strategic Pilot Science and Technology Project of Chinese Academy of Sciences |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/98210]  |
| 专题 | 地质与地球物理研究所_中国科学院油气资源研究重点实验室 |
| 通讯作者 | Zhang, Jian |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Jian,Hao, Tianyao,Dong, Miao,et al. Investigation of geothermal structure of the Sulawesi, using gravity and magnetic method[J]. SCIENCE CHINA-EARTH SCIENCES,2020:16. |
| APA | Zhang, Jian.,Hao, Tianyao.,Dong, Miao.,Xu, Ya.,Wang, Beiyu.,...&Fang, Gui.(2020).Investigation of geothermal structure of the Sulawesi, using gravity and magnetic method.SCIENCE CHINA-EARTH SCIENCES,16. |
| MLA | Zhang, Jian,et al."Investigation of geothermal structure of the Sulawesi, using gravity and magnetic method".SCIENCE CHINA-EARTH SCIENCES (2020):16. |
入库方式： OAI收割
来源：地质与地球物理研究所
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