高压基性麻粒岩与榴辉岩的抬升转换作用——信阳超镁铁质火山角砾岩管的捕虏体研究

ELEVATION AND TRANSLATION BETWEEN HIGH PRESSURE MAFIC GRANULITE AND ECLOGITE: RESEARCH INTO XENOLITHS FROM ULTRAMAFIC VOLCANIC BRECCIA PIPE, XINYANG, HENAN PROVINCE, CHINA

通过对华北地块与秦岭－ 大别造山带结合部位豫南信阳北超基性火山角砾岩管中基性麻粒岩、榴辉岩和石榴石辉石岩捕虏体的岩相学、矿物化学成分的初步研究和对比，发现这些基性岩石捕虏体中大多存在着因抬升降压而发生的转换反应作用．这些转换反应可能与华北地块和秦岭－

It has been discovered that the xenoliths of mafic granulite, eclogite and garnet pyroxenite occur in the ultramafic breccia pipes, located in the junction region of the North China terrain and the Qinling_Dabieshan orogenic zone, north of Xinyang of the southern Henan Province. The initial research and the comparison between these xenoliths in terms of facieology and mineral chemical component have concluded that the xenoliths of these mafic rocks are often characterized by the translation reaction effect resulting from both the elevation and the decompression. These translating reaction may have been associated with the elevation that occurred in the reaction between the North China terrain and Qinling_Dabieshan orogenic zone.