Because of the absence of mantle xenoliths and xenocrysts, it is the first time that this paper looks on the native heavy minerals deriving from mantle, which were collected at the terraces of the two rivers, kalakshi river and yulongkashi river, as objects and takes into account the geochemical characteristics of the rocks deriving from mantle such as keliyang lamproite and so on to study the composition of lithospheric mantle, the characterics of palaeozoic era lithospheric mantle, mantle thermal state, and diamond metallogentic mantle geological conditions in research field 为达到研究目的，本文首次以喀拉喀什河和玉龙喀什河沿岸阶地的幔源重砂矿物(单斜辉石、铬尖晶石类矿物、钛铁矿以及石榴石)为研究对象，结合钾镁煌斑岩等区内已发现的幔源岩石及其中地幔物质对该区地幔物质的组成、古生代岩石圈地幔特征、岩石圈热状态以及该区金刚石成矿地幔地质条件做了尝试性的研究工作。
The comparison of cenozoic basalts and their mantle xenoliths from both sides of the taihangshan gravity lineament reveals that : ( 1 ) cenozoic basalts from western and eastern north china display opposite temporal trends, suggesting lithospheric thinning in western north china during the cenozoic and lithospheric thickening in eastern north china; ( 2 ) the lithospheric mantle in the west is mostly late-archean to proterozoic in age, whereas that in the east has a modern age with minor proterozoic age; ( 3 ) the crust mantle transition in the west is considerably thicker than in the east, probably due to different extents of magmatic underplating 摘要通过对比华北太行山重力梯度带两侧新生代玄武岩及其中幔源包体的成分，发现：(l)华北东、西部新生代玄武岩具有相反的演化趋势，说明新生代以来西部岩石圈逐渐减薄，而东部岩石圈逐渐加厚；(2)西部岩石圈地幔组成相对复杂，年龄多为晚太古代元古代；而东部岩石圈地幔组成相对单一，年龄多为现代值，少数为元古代；(3)西部壳幔过渡带较厚而东部较薄，反映两地不同的岩浆底侵作用程度。
