摘要
雷州半岛南部田洋、九斗洋及青桐洋的英峰岭等陆相中心式喷发的火山碎屑岩中,分布有大量的二辉橄榄岩包体.根据其岩石学、岩石化学及地球化学特征分析,包体来源于上地幔,其成因既有原始地幔岩,亦有上地幔岩经部分熔融出玄武岩浆后的难熔固相残留物,被火山喷发携带至地表.
A great number of lherzolite xenoliths occurs within the volcanic elastics characterized by terrigenous centra] type eruption at Tianyang, Jiudouyang and Yingfenglin of Qingtongyang, of southern Leizhou Peninsula. Based on the petrological, petrochemical and geochemical analyses about these rocks, it is concluded in this paper that the xenoliths were originated from the upper mantle, and comprised of both primitive pyrolite and the infusible solid residual of the upper pyrolite while the basaltic magma was melted out of it, which were brought up to the earth's surface via volcanic eruption.
出处
《新疆地质》
CAS
CSCD
2003年第4期479-481,共3页
Xinjiang Geology
