SCSIO OpenIR  > 中科院边缘海地质重点实验室
Relationship between Formation of Zhongyebei Basin and Spreading of Southwest Subbasin, South China Sea
Gao, HF; Zhou, D; Qiu, Y; promap@163.com
2009
发表期刊JOURNAL OF EARTH SCIENCE
ISSN1674-487X
卷号20期号:1页码:66-76
摘要The Zhongyebei (sic) basin (ZYBB) is an NE-striking, narrow and small sedimentary basin superimposing the southern 1/2 segment of the proposed spreading axes of the SW subbasin of the South China Sea (SCS). More than 4 500 in strata were identified in the Zhongyebei basin, including the Paleogene lower structure layer and the Neogene upper structure layer. The SW subbasin of the South China Sea has been regarded as an oceanic basin opened by scafloor spreading, as evidenced by the flat and deep (> 4 000 in mostly) seafloor with linear magnetic anomalies, and by the shallow Moho depth of < 12 km as estimated from gravity modeling. The classic model of seafloor spreading predicts that sediments on the oceanic crust are younger and thinner towards the spreading axes. But in the southwestern segment of the SW subbasin, contradictions appear. Firstly, the thick sedimentation in the ZYBB is along the proposed spreading axes. Secondly, the sediments are thinner (500-1 500 in) and younger away from the proposed spreading axes. Thirdly, geological elements of the two sides of spreading axes develop asymmetrically in the southwestern SW subbasin. Two models, the early opening model and the limited modeling model, are suggested for resolving this paradox. The former suggests that the opening of the SW subbasin was in Late Eocene and earlier than the oldest sediment in the ZYBB. The latter proposes that the opening of the SW subbasin was limited to its northeastern portion, and did not extend to the southwest portion. The ZYBB is a rift basin survived from the spreading but subjected to severe syn-spreading magmatic disturbance. The SW subbasin and the ZYBB of the SCS provide a unique opportunity for studying the structural evolution and dynamic mechanism at the tip of a propagating seafloor spreading. Both models have unresolved questions, and further studies are needed.
部门归属[Gao Hongfang; Zhou Di] Chinese Acad Sci, Key Lab Marginal Sea Geol, S China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China; [Gao Hongfang; Qiu Yan] Guangzhou Marine Geol Survey, Guangzhou 510760, Guangdong, Peoples R China
关键词Zhongyebei Basin Sw Subbasin South China Sea Rifting Seafloor Spreading
学科领域Geosciences, Multidisciplinary
URL查看原文
收录类别sci
资助项目海洋地质
WOS记录号WOS:000264753800007
引用统计
被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/4640
专题中科院边缘海地质重点实验室
通讯作者promap@163.com
推荐引用方式
GB/T 7714
Gao, HF,Zhou, D,Qiu, Y,et al. Relationship between Formation of Zhongyebei Basin and Spreading of Southwest Subbasin, South China Sea[J]. JOURNAL OF EARTH SCIENCE,2009,20(1):66-76.
APA Gao, HF,Zhou, D,Qiu, Y,&promap@163.com.(2009).Relationship between Formation of Zhongyebei Basin and Spreading of Southwest Subbasin, South China Sea.JOURNAL OF EARTH SCIENCE,20(1),66-76.
MLA Gao, HF,et al."Relationship between Formation of Zhongyebei Basin and Spreading of Southwest Subbasin, South China Sea".JOURNAL OF EARTH SCIENCE 20.1(2009):66-76.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。