摘要
通过岩石学、岩石地球化学和Ｓｍ－Ｎｄ同位素年代学等综合研究，认为海南岛西部变基性火山岩属超镁铁质－镁铁质岩石系列，其中存在较为典型的科马提岩，成岩年龄１１６５Ｍａ±，即中新元古宙。对前人海南岛海西地槽或海西期裂谷观点提出了质疑。提出了军营—邦溪—和盛构造变形带具构造－地（岩）层混杂岩带特征的新认识。
Based on the studing of petrology,petrochemistry and Sm Nd isotopic dating,the metamorphic basic volcanic rocks in western part of Hainan Island which are mainly typical Komatiite belong to hypermafic mafic component sequence and its forming date is about 1 165 Ma.It questions the validity of the predecessors′s viewpoint about Hercynian geosyncline or Late Palaeozoic rifting in Hainan Is land.We have put forward a new understanding that Junying Bangxi Hesheng strongly structural de formation zone has some characteristics of typical melange.
出处
《矿物岩石》
EI
CAS
CSCD
北大核心
1998年第1期79-84,共6页
Mineralogy and Petrology
关键词
变基性
火山岩
岩石特征
同位素定年
钐
钕
metamorphic basic volcanic rocks Komatiite Middle Late Proterozoic melange belt Western part of Hainan Island
