星子群变质核杂岩的特征及其地质意义  

CHARACTERISTICS OF METAMORPHIC CORE COMPLEXES OF XINGZI GROUP AND ITS GEOLOGICAL SIGNIFICANCE

作　　者：项新葵 许建华 徐寇龙 

机构地区：[1]江西省地质矿产局九一六大队,九江332009

出　　处：《矿产与地质》1993年第6期401-407,共7页Mineral Resources and Geology

摘　　要：中生代末—新生代初,由于地壳伸展导致的构造剥离使星子—庐山地区前寒武纪结晶基底的星子群以变质核杂岩的构造形式出露地表.星子群为角闪岩相片岩、变粒岩、斜长片麻岩、斜长角闪岩,原岩为正常沉积的泥砂质岩石和拉斑系列的基性火山岩以及二者的过渡类型.星子群的出现证实了“江南古陆”也存在双层结构的前寒武纪变质基底.From the end of Mesozoic to the earlier Cenozoic ,the Xingzi Group was exposed on the surface the form of metamorphic core complexes structure for the ertension of the crust in Xingzi-Lushan region. The Xingzi Group consists of the amphibolite schist,ganulite plagioclase-gneiss with amphibolite fades. The Xingzi Group is originated from normal sandstone , basic volcanic rock of tholeiite series and transitional one between the both. The present of the Xingzi Group shows that there is the Precambrian metamorphic basement with twin layer structure in Jiangnania.

关 键 词：星子群 变质核杂岩 地质构造 

分 类 号：P583[天文地球—岩石学]