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武夷地块中南平-宁化构造带属性及地质意义探讨
投稿时间:2020-06-16  修订日期:2020-09-12  点此下载全文
引用本文:
DOI:10.19762/j.cnki.dizhixuebao.2021048
摘要点击次数: 88
全文下载次数: 100
作者单位地址
刘欢 中国地质调查局南京地质调查中心 江苏省南京市秦淮区中山东路534号
赵希林 中国地质调查局南京地质调查中心 
张金国 合肥工业大学 
江涧 合肥工业大学 
袁浩为 成都理工大学 
王波 合肥工业大学 
刘萌 成都理工大学 
基金项目:武夷山松溪-庆元地区区域地质调查(编号:DD20190045)和中国地质调查局南京地质调查中心科研发展基金(编号:2019001)
中文摘要:武夷地块中各地体的活动解析是认识华夏板块构造活动演化的窗口。南平-宁化构造带作为划分南武夷地体和北武夷地体的重要边界活动带,其构造属性对我们认识武夷地块中南、北武夷地体的构造演化具有重要意义。前人对南平-宁化构造带中变质火山岩类的研究和认识存在争议,限制了我们对南平-宁化构造带的构造属性的理解。因此,本文利用野外路线地质调查、年代学测定、同位素地球化学测试等手段,对该套变质火山岩做了重点研究,结合前人的研究成果,我们得到以下认识:南平-宁化构造带中的变质火山岩类主要形成于756~720 Ma,主要形成于活动大陆边缘或岛弧环境,表明南平-宁化构造带可能代表了南武夷地体和北武夷地体之间的一条南华纪的近东西向的岛弧火山活动带,结合带中构造变形反映的南北向对冲的汇聚极性,我们认为南武夷地体和北武夷地体之间在南华纪可能还存在洋-陆碰撞乃至陆-陆拼合过程,这也反映了多微地块、多期拼合过程可能更符合华夏板块大地构造演化的主旋律。
中文关键词:武夷地块,华夏板块,南平-宁化构造带,变质火山岩,楼前组
 
The tectonic attribute and geological significance of Nanping-Ninghua tectonic belt in Wuyi block: from the study of meta-volcanic rocks
Author NameAffiliationAddress
Liu Huan China Geological Survey (Nanjing Center) 江苏省南京市秦淮区中山东路534号
Zhao Xilin China Geological Survey (Nanjing Center) 
Zhang Jinguo Hefei University of Technology 
Jiang Jian Hefei University of Technology 
Yuan Haowei Chengdu University of Technology 
Wang Bo Hefei University of Technology 
Liu Meng Chengdu University of Technology 
Abstract:The tectonic activity analysis of the micro-terranes in the Wuyi block is a window to understand the tectonic evolution of the Cathaysia block. As being an important boundary that divided the South Wuyi terrane and the North Wuyi terrane, the Nanping-Ninghua tectocnic belt played a crucial role in understanding the tectonic evolution between the South Wuyi terrane and North Wuyi terrane. However, the previous researches and understandings of the metamorphic volcanic rocks in the Nanping-Ninghua tectonic belt are still controversial, which limits our understanding of the tectonic properties of the Nanping-Ninghua tectonic belt. Therefore, in this paper, we mainly focus on the study of the meta-volcanic rocks by field route geological survey, geochronology dating and isotopic geochemistry determination in the Nanping-Ninghua tectonic belt. Combined with the previous research, we suggested that the metamorphic volcanic rocks in the Nanping-Ninghua tectonic belt were mainly formed at 756-720 Ma in an active continental margin or island arc environment, which indicate that the Nanping-Ninghua tectonic belt may represent a nearly east-west island arc volcanic belt between the South Wuyi terrane and North Wuyi terrane in the Nanhua period. Combined with the convergence polarity of the south-north offset reflected by the tectonic deformation in the tectonic belt, we proposed that there may still be ocean-land collision or land-land merging between the South Wuyi terrane and the North Wuyi terrane in the Nanhua period, which indicates that the multi-micro-terranes and multi-stage collision may be major characteristics for the tectonic evolution process in the Cathaysia block.
keywords:Wuyi block, Cathaysia block, Nanping-Ninghua tectonic belt, metamorphic volcanic rock, Louqian Formation
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