Abstract

A three-dimensional density model allowed us to reveal the deep heterogeneities of the lithosphere of the West Okhotsk region and to characterize the geophysical features of main regional tectonic elements. Using the qualitative analysis of density sections, we identified the peculiarities of disjunctive tectonics at various depths. It is shown that diagonal and orthogonal faults are dominant in the crust and lithospheric mantle of the region, respectively. It is found that the metamorphic basement of the northeastern margin of the North Asian Craton is divided by active long-lived zones on variously oriented blocks. These zones are hosts to mantle-crustal igneous intrusions and endogenic mineralization.

中文翻译：

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西鄂霍茨克地区岩石圈的结构：重力数据的解释

摘要

三维密度模型使我们能够揭示西鄂霍次克地区岩石圈的深层非均质性，并表征主要区域构造要素的地球物理特征。通过密度剖面的定性分析，我们确定了不同深度的断层构造的特性。结果表明，该地区地壳和岩石圈地幔分别以斜向断裂和正交断裂为主。研究发现，北亚克拉通东北缘的变质基底被不同方向的块体上的活动长寿带所划分。这些区域是地幔地壳火成岩侵入和内生矿化的所在地。