【摘要】 东昆仑西段祁漫塔格地区首次发现的晋宁期变质侵入岩(体),侵入于古元古代金水口岩群中,铀-铅同位素年龄值为831±51Ma,时代为新元古代,岩浆成因属地壳物质重熔的MPG型,是同碰撞构造环境下形成。该套变质侵入岩的发现,对于东昆仑西段前震旦纪基底的深入研究及更进一步恢复和确定祁漫塔格构造岩浆带发展演化史具有重要意义。更多还原

【Abstract】 Metamorphic intrusive rocks(bodies) in Jinning epoch which intruded into Jinshuikou rock group of the Paleo-proterozic, the age of U-Pb isotope being 831±51 Ma and belonging to Neo-Proterozoic,were discovered for the first time. The metamorphic intrusive rocks (bodies) derived from magma belong to remelting MPG type with lithosphere matter, and to a tectonic environment of synchronous collision. The discovery of metamorphic intrusive rocks (bodies) has important significance to a thorough investigation and study of Presinian period basement in the west of eastern Kunlun Mt. and to resuming or confirming the developing and evolvement history of Qimantage tectono-magma belt.更多还原