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南岭构造带的基本地质特征
  • ISSN号:0371-5736
  • 期刊名称:《地质论评》
  • 时间:0
  • 分类:P618.510.2[天文地球—矿床学;天文地球—地质学] P618.130.2[天文地球—矿床学;天文地球—地质学]
  • 作者机构:[1]南京大学地球科学系,210093, [2]中国地质科学院地质研究所,100037, [3]中国地质大学,北京100083
  • 相关基金:本文为国家自然科学基金面上项目(编号40572118)和重点项目(编号40132010)资助的成果.
中文摘要:

南岭构造带发育在强烈褶皱变形的基底之上,发育了华南地区最大规模的早中生代花岗岩和裂谷盆地。基底由变质的新元古代一奥陶纪复理石一火山岩系和未变质的晚泥盆世一早三叠世沉积岩系所组成。与南岭带构造演化关系最为密切的区域断裂带有萍乡一桂林、龙岩一海丰、赣江等5条,制约着中、新生代岩体和盆地的分布、规模和产状。无论是物质来源还是形成与演化的动力学背景,南岭构造带均离不开其北面的大别造山带和南西面的印度支那造山带。南岭地区存在3条近东西方向的花岗质岩带,严格受深部构造制约,岩体常受褶皱和断裂构造控制。3个花岗岩带中的岩体时代,具有横向上北老南新、走向上西老东新、朝大洋方向年轻化的迁移演化规律,中生代东西向的花岗岩带是在古特提斯构造域近东西向的断裂带基础上发育的,岩浆热隆伸展构造和变质核杂岩多数发育在两组大断裂的交汇处。在研究区厘定出3种基本盆地类型,晚三叠世-早侏罗世发育类前陆盆地,中侏罗世发育裂谷盆地,早白垩世属火山-沉积断陷盆地,晚白垩世以来则几乎全是箕状断陷盆地。前中侏罗世盆地构造主要受特提斯构造域和印支期碰撞的影响,晚侏罗世以来盆地构造则主要受太平洋构造作用和陆内深部构造的联合制约。武夷山是晚中生代的古地理与气候分隔带;赣江带是晚中生代的火山岩界线;闽西-赣南-粤东地区存在一个近东西向的中侏罗世陆内裂谷带。区内存在3种盆一岭耦合类型:挤压逆冲型(少量)、走滑剪切型(少量)和伸展拆离型(大量)。中、新生代盆地构造和花岗岩山岭有着密切的时空与成因联系,共同构成了华南盆岭构造体系。最后对前中生代构造作用、印支期构造事件、两种构造体制的转换等问题进行了探讨。晚泥盆世-?

英文摘要:

The Nanling belt is distributed on the strong folded-deformed basement and developed the largest scale Early Mesozoic granitoids and rifting basins in South China. The basement is composed of the metamorphosed Neoproterozoic--Ordovician flysch-volcanic series and the non-metamorphosed Late Devonian--Early Triassic sedimentary rocks. Five regional fault zones were recognized, which are closely related to tectonic evolution of the Nanling belt, including the Pingxiang--Guilin, the Longyan--Haifeng, the Ganjiang River, the Chaling-- Guangchang and the Wuzhou--Sihui that affected the size, distribution and attitude of Meso-Cenozoic basins. Both material source and geodynamical setting forming the Nanling belt were constrained by the Dabie orogenic belt to the north and the Indosinian orogenic belt to the southwest. Three sub-EW trending granitic zones occupied this belt and were controlled by deep-seated structure and shallow-seated folding-faulting. The ages of bodies in the three granitic zones show a migrate trend from west to east and become younger toward Pacific direction. The sub-EW trending Mesozoic granitoid zones were developed along the fauk zones of paleo-Tethys tectonic regime, magmatic doming extensional tectonics and metamorphic core complex occurred in the intersection of two group faults. Mesozoic--Cenozoic basins were divided into three types, namely the T2-J1 para-foreland basin, the J2 rifting basin and the K1--Paleogene fault-depression basin including the K1 volcanic accumulation basin and the K2--Paleogene fault depression basin. The pre-Mesozoic basins were mainly affected by Tethys regime and Indosinian tectonic event, the basins since Cretaceous were co-constrained by both Pacific regime and intral-continental deep-seated tectonic-magmatism. Studied results suggest that the Wuyishan belt is a Late Mesozoic geographic and paleo-climate boundary, the Ganjiang River fault is a western boundary of the Late Mesozoic volcanic zone and the Western Fujian--Southern Jiangxi--East Guangdong area was a

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期刊信息
  • 《地质论评》
  • 北大核心期刊(2011版)
  • 主管单位:中国科学技术协会
  • 主办单位:中国地质学会
  • 主编:杨文采
  • 地址:北京阜成门外百万庄路26号中国地质学会期刊处
  • 邮编:100037
  • 邮箱:georeview@cags.ac.cn
  • 电话:010-68999804
  • 国际标准刊号:ISSN:0371-5736
  • 国内统一刊号:ISSN:11-1952/P
  • 邮发代号:2-382
  • 获奖情况:
  • 中国期刊方阵“双效”期刊
  • 国内外数据库收录:
  • 美国化学文摘(网络版),美国地质文献预评数据库,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊(2004版),中国北大核心期刊(2008版),中国北大核心期刊(2011版),中国北大核心期刊(2014版),中国北大核心期刊(2000版)
  • 被引量:23413