Rock physics diagnostics to characterize early diagenetic processes in hemipelagic calcareous ooze in the northern South China Sea margin
文献类型：期刊论文
| 作者 | Wang, Jiliang5 ; Ma, Benjun4; Zhao, Luanxiao3; Su, Pibo1,2; Wu, Shiguo5
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| 刊名 | MARINE GEOPHYSICAL RESEARCH
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| 出版日期 | 2023-12-01 |
| 卷号 | 44期号:4页码:12 |
| ISSN号 | 0025-3235 |
| 关键词 | Hemipelagic calcareous ooze Early diagenesis Porosity IODP South China Sea |
| DOI | 10.1007/s11001-023-09528-x |
| 通讯作者 | Wang, Jiliang(wangjl@idsse.ac.cn) ; Su, Pibo(spb_525@sina.com) |
| 英文摘要 | Hemipelagic calcareous ooze is a mixture of biogenic carbonate ooze and detrital terrigenous materials from continental weathering. Understanding its early diagenetic features is critical for geophysical measurement and geo-hazard assessment. However, the early diagenesis of hemipelagic calcareous ooze has rarely been studied due to a lack of samples and in-situ measurement in shallow strata. During IODP Expedition 368, hemipelagic calcareous oozes, up to hundreds of meters thick, were encountered in the shallow subsurface (< 400 m) at two sites (U1501 and U1505) close to the continent-ocean transition zone in the northern South China Sea margin. Here, we use coring and well logging data to perform rock physics diagnostics to characterize early diagenetic processes in hemipelagic calcareous ooze. The calcareous ooze in the study area is primarily chalky marl with the ratio of carbonate to carbonate plus siliciclastic minerals ranging 30% similar to 70%, according to a mineralogy-based lithofaices classification scheme. In the chalky marl interval, pyrite accounts for around 15% of the total mineral composition and this existence may be related to significant post-rift magmatic activity that produced significant amouts of volcanic material. The porosity reduction with depth in the chalky marl interval has three phases and carbonate content is suggested to be the controlling factor affecting porosity reduction. The varying carbonate content in the oozes can result in contrasting mechanical properties and porosities, potentially serving as weak layers for submarine landslides. Additionally, the interface between calcareous ooze and siliciclastic sediment is also a potential failure plane. Therefore, we propose that the development of hemipelagic calcareous ooze has significant implications for seafloor instability on continental margins. |
| WOS关键词 | CHALK RESERVOIR ; SEDIMENTS ; POROSITY ; BURIAL ; BAIYUN |
| 资助项目 | We thank the IODP 367amp;368 crews and participating scientists. |
| WOS研究方向 | Geochemistry & Geophysics ; Oceanography |
| 语种 | 英语 |
| 出版者 | SPRINGER |
| WOS记录号 | WOS:001081966900001 |
| 资助机构 | We thank the IODP 367amp;368 crews and participating scientists. |
| 源URL | [http://ir.idsse.ac.cn/handle/183446/10569]  |
| 专题 | 深海科学研究部_深海地球物理与资源研究室 |
| 通讯作者 | Wang, Jiliang; Su, Pibo |
| 作者单位 | 1.Acad South China Sea Geol Sci, China Geol Survey, Sanya 572025, Peoples R China 2.Guangzhou Marine Geol Survey, Sanya Inst South China Sea Geol, Sanya 572025, Peoples R China 3.Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China 4.Harbin Engn Univ, Acoust Sci & Technol Lab, Harbin 150001, Peoples R China 5.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Jiliang,Ma, Benjun,Zhao, Luanxiao,et al. Rock physics diagnostics to characterize early diagenetic processes in hemipelagic calcareous ooze in the northern South China Sea margin[J]. MARINE GEOPHYSICAL RESEARCH,2023,44(4):12. |
| APA | Wang, Jiliang,Ma, Benjun,Zhao, Luanxiao,Su, Pibo,&Wu, Shiguo.(2023).Rock physics diagnostics to characterize early diagenetic processes in hemipelagic calcareous ooze in the northern South China Sea margin.MARINE GEOPHYSICAL RESEARCH,44(4),12. |
| MLA | Wang, Jiliang,et al."Rock physics diagnostics to characterize early diagenetic processes in hemipelagic calcareous ooze in the northern South China Sea margin".MARINE GEOPHYSICAL RESEARCH 44.4(2023):12. |
入库方式： OAI收割
来源：深海科学与工程研究所
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