论文部分内容阅读
中国中部大别杂岩和哈萨克斯坦柯切塔夫杂岩是世界著名的含金刚石变质杂岩，二者都位于地台边缘。笔者进行的矿物学岩石学研究揭示了这些杂岩中含金刚石变质岩的最主要性质———多相性。金刚石及其特征的共生矿物（钾质单斜辉石、柯石英、石榴石、锆石等）的地幔性质指示含金刚石变质岩在成因上与约１５０～２００ｋｍ的岩浆房有关，这与金伯利岩筒的含金刚石岩浆岩的岩浆房相同。矿物相图反映了含金刚石岩浆作用中心的氢水特点，这可以解释金伯利岩金刚石中的含水矿物包裹体和大别变质杂岩中榴辉岩、石榴单辉岩的石榴石中含水矿物包裹体的存在。地内期高压矿化的石榴单辉岩和榴辉岩岩浆侵入到地幔上层和地壳中，这一作用发生在褶皱前碳酸盐陆源层状地层形成的早期阶段。以后，这些含金刚石侵入体与围岩一道遭受了异化学变质（混合岩化、花岗岩化和退变质），部分转变为新岩石———混合岩、片麻岩、角闪岩、片岩和退变岩，这些新岩石继承了石榴单辉岩及其它含金刚石母岩的金刚石部分。
The Dabie Complex in Central China and the Koetake Complex in Kazakhstan are world-famous diamond-bearing metamorphic complexes, both of which are located on the edge of the platform. Mineralogical petrology research conducted by the author reveals the most important property of diamond-bearing metamorphic rocks in these complexes - heterogeneity. The mantle properties of diamond and its characterized symbiotic minerals (koduclite, coesite, garnet, zircon, etc.) indicate that the metamorphic rocks are genetically related to magma chambers of about 150-200 km, which is related to kimberlite The magma chamber containing diamond-bearing magmatic rocks is the same. The mineral phase diagram reflects the hydrogen water feature of the diamond-bearing magma center, which explains the water-bearing mineral inclusions in kimberlite diamonds and eclogites in the Dabie metamorphic complex, The presence. The intra-stage high-pressure mineralization of pomegranate dolomite and eclogite magmas intruded into the upper mantle and the crust, a function that occurred in the early stages of stratigraphic pre-folding carbonate terrestrial stratigraphy. Later, these diamond-bearing intrusions, along with the surrounding rock, were subject to various metamorphic metamorphic metamorphic rocks (migmatitic, granitic and retrogressive), partially transformed into new rocks - mixed rocks, gneiss, amphibolite, schist and retreat Variable rocks, these new rocks inherited pomegranate dolomite and other diamond-bearing diamond-bearing part of the rock.