地质论评2011，Vol.57Issue(3)：316-326,11.
滇东南"新寨岩组"与变质花岗质岩的接触关系及其地质意义
Contact Relationships between “Xinzhai Formation-complex” and Metamorphic Granitic Rocks in Southeastern Yunnan and Their Geological Significances
摘要
Abstract
North Vietnam Block is situated in Yunnan－Guangxi boundary, China, and northern Vietnam, is a key area for studying the interactions between Yangtze, Cathaysia and Indochina blocks. We investigated the contact relationships between “Xinzhai Formation-complex” and metamorphic granitic rocks located in north margin of North Vietnam Block. We suggest that the contact relationships should be three new relationships (sedimentary contact, intrusive contact, transitional contact), instead of prior detachment fault contact. The sedimentary contact indicates the Sinian－ Cambrian overlap (Southwest toward northeast) in north margin of North Vietnam Block. Intrusive contact and transitional contact reflect the emplacement of Caledonian granites in this area, which result in the forming of Dulong－Song Chay dome. The prior “Xinzhai Formation-complex” includes Late Sinian － Cambrian System. The prior Palaeoproterozoic granitic gneisses should be Silurian tectonic－magmatic thermal event. The previous Silurian granites should be re-divided into Neoproterozoic and Silurian granites.关键词
新寨岩组/花岗杂岩/接触关系/滇东南Key words
Xinzhai Formation-complex/ granitic complex/ contact relationships/ southeastern Yunnan Province引用本文复制引用
张斌辉,丁俊,张林奎,陈敏华,王鹏,戴婕..滇东南"新寨岩组"与变质花岗质岩的接触关系及其地质意义[J].地质论评,2011,57(3):316-326,11.基金项目
本文为中国地质调查局"越北古陆北缘地质构造演化及其成矿效应研究"项目(编号1212010911065)和"云南麻栗坡地区矿产远景调查"项目(编号1212010880402)的成果. （编号1212010911065）
