地幔岩石

近年来，铂族元素和Re-Os同位素在研究各类不同地质作用过程中，尤其是在地幔岩石的研究中，作用独特，效果显著。

Recently , the application of PGEs and Re Os isotope systems in the study of various geological processes , especially in mantle rocks study , has achieved great success and proven to be a useful geochemical tool .

上地幔部分熔融作用不仅控制了上地幔岩石类型演化（二辉橄榄岩→方辉橄榄岩→纯橄榄岩），同时它对铬铁矿的预富集起着关键作用。

The partial melting of the upper mantle not only controlled the evolution of mantle rock types ( lherzolite → harzber-gite → dunite ) but also played a critical role for chromite preconcentration .

武陵山重力梯度带附近，中下地壳至上地幔岩石层有很高的电阻率，它和梯度带的形成有关。

The resistivity from the middle-lower crust to the upper mantle of lithosphere , near the gravity gradient zone in the Wuling mountain , is very high . It is related to the forming of the gradient zone .

广东三水盆地古俯冲带地幔源岩石的年代学与Nd-Sr-Pb同位素证据

Geochronology of and Nd-Sr-Pb isotopic evidence for mantle source in the ancient subduction zone beneath Sanshui basin , Guangdong Province , China

外核加热地幔底部岩石，使其变成具有浮力的灰泥，灰泥涌向地壳上方。

The outer core heats the mantle 's bottom rocks into buoyant putty , which rises toward the crust , as if in a lava lamp .

地幔对流与岩石层板块的相互耦合及影响&（Ⅰ）球腔中的自由热对流

Coupling between mantle circulation and lithospheric plates ──(ⅰ) thermal free convection in a spherical shell

另一方面，地幔对流对岩石层底部的拖曳作用将直接影响该区域岩石层形变运动。

In another hand , mantle convection process may directly influence the surface deformation movement of the region .

中生代早期该区上地幔是多种岩石构成的构造混杂岩带，深部地壳主要由片麻岩类、角闪岩类和少量石榴辉石岩类组成。

Many kinds of rocks from the upper mantle in Early Mesozoic consist of a suit of tectonic complex .

其中，印度板块向北的强烈推挤以及地幔对流对岩石层底部的拖曳作用占据着非常重要的地位。

Among them , the northward indention of India plate and the mantle convection induced dragging force on the bottom of lithosphere play important roles .

CO2的成因可以分为无机成因和有机成因两大类，无机成因的CO2主要为地幔脱气作用、岩石化学反应及碳酸盐岩受热分解形成的；

The origin of CO_2 Gas Reservoirs can be divided into two kinds : inorganic and organic . The former is generally formed by mantle degassing , chemical reaction of rock and carbonate thermal decomposition .

来自较古老正常地幔或贫化地幔的岩石，在锇同位素方面体现为187Os／186Os初始比值接近或低于Re－Os同位素体系地幔演化线值。

Secondly , ancient rocks derived from the normal mantle or depleted mantle had initial187Os / 186Os ratios close to or lower than that of the mantle evolution .

熔体岩石相互作用最终导致了陆下岩石圈地幔富集SiO2，这种被含水富硅熔体改造后的地幔岩石的部分熔融可能是造成陆壳富硅富镁的主要原因。

This kind of melt-rock interaction makes the uppermost mantle enriched in Si , which might be the key to know the compositional characteristics of continental crust .