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西藏康金拉铬铁矿石的矿物学研究中,发现大量的微粒金刚石和碳硅石等超高压异常地幔矿物,表明它们产在一个强还原的高压环境。本研究在铬铁矿石中还发现了刚玉及其中大量的矿物包裹体。电子探针等方法研究表明,包裹体的种类包括简单氧化物,如金红石;自然钛;Ti-N、Ti-Si、Ti-C、Ti-Si-P、Ti-B等合金类;含稀土元素的硅酸盐矿物,以及一些未知矿物。结合对铬铁矿石中其他矿物的研究成果,认为康金拉铬铁矿石中的刚玉及其中的强还原环境形成的矿物组合形成于深部地幔。因此,康金拉铬铁矿石中的刚玉可以认为是一种新的带有高压环境信息的标志性矿物。
In the mineralogical study of Kangjinla chromite in Tibet, a large amount of ultrahigh-pressure anomalous mantle minerals such as particulate diamond and carbon-silica are found, indicating that they are produced in a strongly reduced high pressure environment. The study also found corundum and a large number of mineral inclusions in chromite. Electron probe and other methods show that the types of inclusions include simple oxides such as rutile; natural titanium; alloys such as Ti-N, Ti-Si, Ti-C, Ti-Si-P and Ti-B; Elements of silicate minerals, as well as some unknown minerals. Combined with the research results of other minerals in chromite, it is considered that the mineral assemblage formed by corundum in Kangjinla chromite ore and its strong reduction environment is formed in the deep mantle. Therefore, corundum in the Compton chromite can be considered as a new landmark mineral with high-pressure environmental information.