南海中北部中新世陆坡凹陷沉积充填与古陆坡形态演变

黎明碧; 金翔龙; 李家彪; 初凤友; 方银霞; 唐勇

南海中北部中新世陆坡凹陷沉积充填与古陆坡形态演变

1.
浙江大学, 地球科学系, 浙江, 杭州, 310027;国家海洋局海底科学重点实验室, 浙江, 杭州, 310012
2.
国家海洋局海底科学重点实验室, 浙江, 杭州, 310012

基金项目: 国家重点基础研究发展规划资助项目(G2000046704)

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出版历程
- 收稿日期: 2004-03-10
- 修回日期: 2004-09-22

Miocene deposition and palaeo-slope evolvement of the middle part of northern continental slope in the South China Sea

1.
Department of Geosciences, Zhejiang University, Hangzhou 310027, China;Key Laboratory of Submarine Geoscience of State Oceanic Administration, Hangzhou 310012, China
2.
Key Laboratory of Submarine Geoscience of State Oceanic Administration, Hangzhou 310012, China

摘要

摘要: 对中德合作“南海地球科学联合研究”和“中国边缘海的形成演化及重大资源的关键问题”的有关航次获得的地震资料进行层序地层和沉积相解释,并结合前人的研究成果,对南海中北部陆坡凹陷的构造和沉积特征进行了研究.研究结果表明,南海中北部陆坡区凹陷的构造演化经历了裂陷期、裂陷-坳陷过渡期和坳陷期三个阶段,沉积环境经历了河流-湖泊、浅海和深海的演化过程,不同演化阶段形成不同的地形形态.南海中北部地形演变可分为三个阶段,即早第三纪、早中新世-中中新世中期和中中新世中期-现在,其中早中新世中期-中中新世中期的沉积充填使陆坡形态发生了重要的转变,这次转变基本上奠定了现代意义上的陆架-陆坡-海盆的格局.
- 南海 /
- 陆坡区凹陷 /
- 早中新世-中中新世 /
- 沉积充填 /
- 形态转变
Abstract: The studies of tectonics and deposition of depression in the middle part of northern continental slope in the South China Sea were dealt with,based on the sequence stratigraphy and depositional facies interpretation of seismic profiles acquired by cruises of "China and Germany Joint Study on Marine Geosciences in the South China Sea" and "The formation,evolution and key issues of important resources in China marginal sea",and combining with the previous studies in the study area.It is shown that the tectonic evolution of continental slope depressions can be divided into rifting,rifting-depression transitional and depression stages,while their depositional environments change from river to shallow marine and abyssal,which results in different topography in different stages.The topographic evolvement in the study area includes three stages,that is,Eogene,middle stage of early Miocene to middle Miocene and late Miocene to present,in which the infill of depressions during the second stage results in the crucial change of slope shape,and forms the present style of the slope.
- South China Sea /
- continental slope depression /
- Early-Middle Miocene /
- deposition /
- continental slope shape evolvement

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