Discovery of granulite xenoliths from Xikeer, Tarim, Northwest China and its geological implications.

在塔里木西部新生代碧玄岩中新发现了基性麻粒岩捕虏体。其原生矿物组合为Cpx+Opx+Pl(An=30～50)+Sp+Ilm+Tim,次生矿物组合为Ol+Pl(An>50)+alkaline feldspar+glass。原生矿物组合的温度和压力分别为1005～1059℃和0.6～1.1GPa;次生矿物组合形成于近等温减压过程和固相线上熔融以及之后的近地表快速冷却。这些麻粒岩捕虏体代表了早期底侵到塔里木板块下地壳的幔源岩浆。Mafic granulite xenoliths in Cenozoic has:mite were newly found in Xikeer, western Tan in Block The in nary mineral assemblage of Xikeer granulite xenoliths is Cpx + Opx + (An = 30 similar to 50) + Sp + IIm + Tim, and the secondary mineral assemblage is 01 + PI (An > 50) + alkaline feldspar + glass. The temperature and pressure of the primary in assemblage are 1005 similar to 1059 degrees C and 0 6 similar to 1 1GPa. The secondary mineral assemblage is originated during isothermal decompression (ITD), supra-solidus melting as well as fast cooling near the surface. These granulite xenoliths represent a previous mantle derived magma underplate at the low crust of the Tarim blockhttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000275734400018&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701SCI(E)中文核心期刊要目总览(PKU)中国科技核心期刊(ISTIC)中国科学引文数据库(CSCD)302573-5832