南海中央海盆岩石圈厚度和地壳年代的初步分析
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摘要: 在洋中脊、停止活动的脊岭、深海的岩石圈断裂的裂缝和熄灭的海底火山等4种类型地区,建立3个岩石圈厚度和热传导模型.得到这些模型的解是相同的.求解得岩石圈内和软流圈顶层的温度分布公式、利用热流计算岩石圈厚度和地壳年龄公式;计算中央海盆的地壳年龄和岩石圈厚度;并列表和作出中央海盆岩石圈厚度和地壳年龄图.根据它们的特征,把中央海盆分成3个区,并分别讨论其岩石圈的厚度、地壳年龄和热流分布的特征;分析南海的形成和演化,指出南海经历过三幕海底扩张.
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