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根据南海海槽陆侧斜坡上的天然气水合物层估算的热流值表明,热流从斜坡到海沟底逐渐增大。把这些资料以及利用常规探头新测得的6个热流值和获自深海钻探资料的两个数值,与原有的资料结合起来,便可详细获悉南海海槽热流的分布。从这些资料来看,热流值呈带状分布,且与海槽轴平行,槽底为一高热流带,这对于俯冲带来说是一种极其异常的现象。这种现象可以解释成是菲律宾海板块较热的那一部分,亦即四国海盆的俯冲作用,以及一些局部效应(例如来自俯冲沉积物的热水侵入了槽底下面的较浅处)所导致的。对海槽陆侧的地表热流型式进行了计算,以作为一种简单的热俯冲模式。仅利用这种简单的模式是很难完整地模拟出所测到的热流值呈带状分布,这说明还需要进行更多的热流观测以及其它各种观测。
The estimated heat flux from the gas hydrate layer on the continental slope of the South China Sea Trough shows that the heat flux gradually increases from the slope to the bottom of the trench. Combining these data, as well as the six newly measured heat flux values from conventional probes and the two values obtained from deep-sea drilling data, together with the available data, provides detailed information on the distribution of heat flux in the South China Sea trough. From these data, the heat flow values are in a zonal distribution and parallel to the axis of the trough. The bottom of the trough is a high-heat flow zone, which is an extremely anomalous phenomenon for the subduction zone. This phenomenon can be explained by the hotter part of the Philippine Sea plate, the subduction of the Shikoku basin and some local effects such as the intrusion of hot water from subduction sediments into the shallower part of the bottom of the trough . Surface heat flow patterns on the land side of the trough were calculated as a simple thermal subduction pattern. It is difficult to completely simulate the zonal distribution of measured heat flow values using only this simple model, which indicates that more heat flux observations and other observations are needed.