华夏块体及邻区新元古代-早古生代沉积记录与华南洋演化:问题、讨论与建议  

Relationship between Neoproterozoic and Early Paleozoic Stratigraphic Sequence and the Evolution of South China Ocean in the Cathaysia Block and Adjacent Area:Problem,Discussion and Suggestions

作　　者：牛志军 何垚砚 宋芳 周岱 杨文强 田洋 刘浩 王志宏 安志辉 NIU Zhi-Jun;HE Yao-Yan;SONG Fang;ZHOU Dai;YANG Wen-Qiang;TIAN Yang;LIU Hao;WANG Zhi-Hong;AN Zhi-Hui(Hubei Key Laboratory of Paleontology and Geological Environment Evolution,Wuhan 430205,Hubei,China;Wuhan Center,China Geological Survey(Geosciences Innovation Center of Central South China),Wuhan 430205,Hubei,China)

机构地区：[1]古生物与地质环境演化湖北省重点实验室,湖北武汉430205 [2]中国地质调查局武汉地质调查中心(中南地质科技创新中心),湖北武汉430205

出　　处：《华南地质》2024年第2期234-251,共18页South China Geology

基　　金：国家自然科学基金项目(Nos.U2244212,41772019);中国地质调查局项目(Nos.DD20240038,DD20243455,DD20230226);古生物与地质环境演化湖北省重点实验室开放基金项目(PEL-202106)。

摘　　要：华南作为罗迪尼亚超大陆和冈瓦纳大陆的组成部分,在新元古代至早古生代经历了大陆汇聚和裂解、雪球地球事件、早期生命演化等一系列重大地质事件,但组成华南大陆的两大块体之一的华夏块体构造属性及其与扬子陆块拼贴过程等最基本的认识仍然存在争议,其核心是华南洋演化问题。本文在扬子东南缘至华夏地区新元古代-早古生代火山-沉积序列对比基础上,总结了扬子型和华夏型沉积建造组合类型在华南地区的时空演化过程,进而对华夏块体构造属性和新元古代至早古生代的不同演化模式进行了讨论,重点对比探讨了陆内造山模式和增生造山模式的认识。为准确约束华南洋的性质与演化过程,本文建议在地质调查工作中加强中南地区新元古代-早古生代沉积序列、沉积时代、古地理恢复及构造背景等,以及信宜-增城带、郴州-临武-钦防带两侧地层对比和钦防海槽的深入研究。South China,as a part of Rodinia and Gondwana,has evolved through the assembly and breakup of the supercontinent,the snowball earth,and the evolution of early life during the Neoproterozoic to Early Paleozoic.However,the tectonic feature of the Cathaysia block and its interrelation with the Yangtze block are still controversial,the key issue of which is the evolution of the South China Ocean.Here we summarize the main tectonic evolution models of Cathaysia block during the Neoproterozoic to Paleozoic based on the correlation of contemporaneous volcanic-sedimentary sequences and temporal-spatial evolution of the Yangtze-typed and Cathaysia-type sedimentary formations,focusing on two models of intercontinental orogeny and accretionary orogeny.To accurately constrain the characteristics and evolution history of the South China Ocean,it is suggested that further research should be achieved on the sedimentary sequences,sedimentary timing,paleogeography and tectonic setting of Central South China during Neoproterozoic to Early Paleozoic,on the stratigraphic correlation across tectonic zones of Xinyi-Zengcheng and Chenzhou-Linwu-Qinfang,as well as further discussion on the Qinfang Trough.

关 键 词：新元古代 早古生代 华夏地块 华夏造山系 华南 

分 类 号：P535[天文地球—古生物学与地层学]