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黑龙江科洛地区响岩质碱玄岩中包含尖晶石二辉橄榄岩地幔捕虏体,电子探针精细研究发现,铬尖晶石周围发育有丰富的磷酸盐及交代形成的矿物,这些磷酸盐为一种特殊富P,F地幔熔/流体的结晶(?)残余物.激光拉曼光谱分析确定上述磷酸盐绝大部分为玻璃相.这种地幔熔/流体可以进一步交代原始矿物而形成新的尖晶石、橄榄石和透辉石等.因此,科洛地区上地幔的交代作用与富P,F熔/流体有关.中国东部其他地区的岩石圈地幔可能也存在相似的地幔交代作用,这项研究对进一步揭示中国东部岩石圈地幔交代熔/流体的类型和复杂性具有重要意义.
Aryl protoliths in the Kolo area of Heilongjiang Province contain spinel lherzolite mantle xenoliths. The detailed investigation of the electron probe revealed that there are rich phosphates and metasomatism minerals formed around the chromite spinels. These phosphates are Crystallization (?) Residue of a particularly rich P, F mantle melt / fluid. Laser Raman spectroscopy identified most of the above phosphates as glassy phases. This mantle melt / fluid can then be further exchanged for primitive minerals to form new Spinel, olivine and diopside, etc. Therefore, the metasomatism of the upper mantle in the Kolo area is related to the enrichment of P and F melt / fluid, and similar lithospheric mantle metasomatism may exist in other parts of eastern China The research is of great significance to further reveal the type and complexity of the mantle / metasomatic melt / fluid in the lithosphere in eastern China.