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首页> 外文期刊>Chinese science bulletin >Mantle metasomatism by P- and F-rich melt/fluids: evidence from phosphate glass in spinel Iherzolite xenolith in Keluo, Heilongjiang Province
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Mantle metasomatism by P- and F-rich melt/fluids: evidence from phosphate glass in spinel Iherzolite xenolith in Keluo, Heilongjiang Province

机译：富含P和F的熔体/流体的地幔交代作用：来自黑龙江省克罗的尖晶石Iherzolite异岩中磷酸盐玻璃的证据

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摘要

Spinel Iherzolite xenoliths were found in phonolitic alkaline basalt in the Keluo area, Heilongjiang Province. Detailed electron-microprobe study revealed abundant phosphates and associated me-tasomatic minerals between primary phases in xenolith. Thephosphates are considered special residual phases (coagulation) of P- and F-rich mantle melt/fluid, most of which were identified as glass phases based on Raman spectroscopic analyses. Such melt/fluid also further metasomatized primary minerals, thus leading to formation of reaction rims successively composed of Cr-spinel symplectitic zone and olivine + diopside zone. Therefore, the P- and F-rich melt/fluid played an important role in the upper-mantle metasomatism in the Keluo area. It is suggested that this kind of metasomstism may occur in some other places of eastern China. The present results may also have significance in studying types of metasomatic melt/fluid and its evolution in the lithospheric mantle beneath eastern China.
机译：在黑龙江省克罗地区的盐岩碱性玄武岩中发现了尖晶石Iherzolite异岩。详细的电子探针研究表明，在异种岩的初级相之间有大量的磷酸盐和相关的介孔矿物。磷酸盐被认为是富含P和F的地幔熔体/流体的特殊残留相（凝结），根据拉曼光谱分析，其中大多数被确定为玻璃相。这种熔体/流体还进一步交化了主要矿物，因此导致形成了依次由Cr-尖晶石共晶带和橄榄石+透辉石带组成的反应边缘。因此，富含P和F的熔体/流体在科洛地区上地幔交代作用中起着重要作用。建议在中国东部的其他地方也可能发生这种metosomstism。目前的研究结果对研究中国东部岩石圈地幔中交代熔体/流体的类型及其演化也可能具有重要意义。

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