俄罗斯贝加尔湖-日本石卷地学断面西段地质-地球物理基本特征

对于贝加尔湖-石卷地学断面(BAMSIP)的西段俄罗斯贝加尔湖-中国满洲里断面城内的地质构造背景、地震剖面波类型和基本特征等研究发现：(1)断面域中贝加尔裂谷带地震波速度结构存在异常地幔带；结晶地壳物质成分基性程度较高；基底顶面和Moho界面未观察到明显的镜象关系；(2)西伯利亚南部的复杂相故基底由古生代和前寒武纪岩层所组构；区域构造由古褶皱系、中生代沉积盆地、裂谷带构成。

THE BASIC GEOLOGICAL-GEOPHYSICAL CHARACTERISTICS OF THE CRUST NEARBY THE WEST SEGMENT OF THE RUSSIA BAIKAL LAKE JAPAN ISHINOMAKI GEOSCIENCE TRANSECTS

For the western segment of Russia Baikal lake-China Manzhoul i, as a part of Baikal lake-Ishinomaki geoscience transects, the geological tecton ic background, the type and the basic feature of the seismic wave observed along the profiles were disccussed. Through researches conclusions are as follows: a. there are abnormal mantle layers in the seismic wave velocity structure of Baik al rift belt; and the basicity of the crystal crust ingredient is high. It isn 't observed that there is obvious mirror image relation between the top of base ment and Moho boundary surface. b. In the southern Siberia, the complex fold bas ement was consisted of Palaeozoic and Pre-cambrian rock formations, and the regi onal structure was formed by ancient fold system, Mesozoic depositional basin an d rift belt.