黄文凯. 南海北部边缘壳内低速层发育特征与尖灭成因[J]. 海洋地质前沿, 2017, 33(8): 1-10. DOI: 10.16028/j.1009-2722.2017.08001
    引用本文: 黄文凯. 南海北部边缘壳内低速层发育特征与尖灭成因[J]. 海洋地质前沿, 2017, 33(8): 1-10. DOI: 10.16028/j.1009-2722.2017.08001
    HUANG Wenkai. CHARACTERISTICS AND PINCH-OUT OF LOW VELOCITY LAYERS IN THE CRUST OF NORTHERN SOUTH CHINA SEA MARGIN[J]. Marine Geology Frontiers, 2017, 33(8): 1-10. DOI: 10.16028/j.1009-2722.2017.08001
    Citation: HUANG Wenkai. CHARACTERISTICS AND PINCH-OUT OF LOW VELOCITY LAYERS IN THE CRUST OF NORTHERN SOUTH CHINA SEA MARGIN[J]. Marine Geology Frontiers, 2017, 33(8): 1-10. DOI: 10.16028/j.1009-2722.2017.08001

    南海北部边缘壳内低速层发育特征与尖灭成因

    CHARACTERISTICS AND PINCH-OUT OF LOW VELOCITY LAYERS IN THE CRUST OF NORTHERN SOUTH CHINA SEA MARGIN

    • 摘要: 研究表明,南海北部边缘广泛存在壳内低速层,且往海盆方向逐渐尖灭消失。认识壳内低速层为何尖灭是研究南海形成演化不可或缺的环节之一。通过总结前人对华南沿海及南海北部地壳结构调查的成果,对比了南海北部与华南大陆壳内低速层的分布特征,并解释了区域地震剖面等资料,探讨了南海北部边缘壳内低速层的尖灭的原因,认为大型断裂带为壳内低速层提供热散失的渠道,使未彻底固化的早期熔融层冷却固化的过程加速,从而使低速层尖灭消失。研究对认识南海北部深部地壳结构、边缘海形成演化过程有重要意义。

       

      Abstract: Low Velocity Layer (LVL) zones are commonly seen in South China and the Northern South China Sea (SCS) and pinch out towards the sea basin. It is indispensable to understand the cause of LVL pinch-out in order to disclose the origin and development of the SCS. This article summarized previous studies and compared the distribution of LVL in South China and the Northern SCS based on interpretation of seismic sections from related areas. The results suggest that large fault zones play key roles in LVL pinching out in the Northern SCS. LVL might release its heat along great fault zones, accelerate the process of consolidation of early fusion layer and at the same time make the LVL pinching out.

       

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