大陆岩石圈有效弹性厚度与有关地球物理参数的关系——以泉州黑水地学断面为例

The Correlation between the Effective Elastic Thickness of the Continental Lithosphere and Some Related Geophysical Parameters: A Case Study of the Quanzhou-Heishui Geoscience Transect

大陆岩石圈有效弹性厚度(Te)是反映岩石圈综合强度的参数,它反映了岩石圈的整体特征。分析岩石圈有效样性厚度与反映深部地质特征的有关地球物理参数之间的关系,对研究控制Te的因素、各因素之间的关系以及探索大陆构造与大陆动力学等具有重要意义。泉州黑水地学断面Te与地壳厚度、热岩石圈厚度、均衡重力异常、磁性构造层底面深度、上地幔低速层顶界面深度、上地幔低阻层顶面深度之间的关系研究表明:Te与大地热流关系密切的“热”地球物理参数磁性构造层底面深度、热岩石圈厚度相关性好;与地壳厚度有一定的相关性;上地幔低速层顶界面深度和上地幔低阻层顶面深度与大陆岩石圈Te相关性均较差。

Te, the effective elastic thickness of the continental lithosphere which reflects the whole feature of the lithosphere, is a parameter standing for the integrated strength. The analysis of the relationship between Te and some geophysical parameters reflecting the related deep geology is of great significance in studying the factors controlling Te, the relationship between the factors and the correlation between the continental structure and continental dynamics. Researches on the relationships of Te to such geological attributes as the crustal thickness, the thermal lithospheric thickness, the isostatic gravity anomaly, the base depth of the magnetic tectonic layer, the low resistivity layer and the depth of top interface of the low velocity layer in the upper mantle indicate that Te of continental lithosphere is closely related to 'heat' geophysical parameters, the base depth of magnetic tectonic layer and the thermal lithospheric thickness, that there exists some correlation between Te and crustal thickness but indistinct correlation between Te and such geological factors as the isostatic gravity anomaly, the depth of the top interface of the low velocity layer and the low resistivity layer in the upper mantle.