摘要
北京周口店地区房山岩体周围,分布有一套由片麻岩、斜长角闪岩、混合岩、糜棱岩等组成的变质杂岩。杂岩与房山岩体呈侵入接触关系,杂岩的岩石学、岩石化学、稀土元素分配特征与房山岩体及围岩相比的特殊性,及与太古代区域变质岩的相似性,以及杂岩本身的副矿物及其经历的多种变质地质过程等特点都表明:关坻杂岩是太古宙的一套区域变质岩,而不是太古代以后的变沉积岩与房山岩体岩浆混染成因的混染岩。
In the area of Zhoukoudian, Beijing, there is a metamorphic complex compo-sed of gneiss,amphibolite migmatites and mylonites,along with the Fangshan intru-sive body. The complex is in intrusive contact with the Fangshan intrusive body. Its petrology, petrochemistry and rare earth element distribution patterns are dif-ferent from that of country rocks, and very similar to Archean regional meta-morphic rocks in the world. The distinctive features of its accessory minerals show that it has experienced a various geological processes. All of these indicate that the Guandi complex belong to the Archean regional metamorphic rocks, not to the mictite which formed from postarchean metasediments and magma of Fang-shan intrusive body.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
1990年第5期529-538,共10页
Earth Science-Journal of China University of Geosciences
关键词
杂岩
关坻
太古代
岩石学
稀土元素
Guandi complex, Archean, petrology, rare earth element,Beijing.
