地质学报2012，Vol.86Issue(12)：1905-1916,12.
江南造山带北缘鄣源构造带主要地质特征
Characteristics of Zhangyuan Structure Belt in the Northern Margin of Jiangnan Orogen
摘要
Abstract
The Zhangyuan structure belt is a regional ultra-crust faulting belt intensely superimposed by Indosinian-Yanshanian thrust-strike slip brittle fault, characterized by NW-SW-trending ductile structural deformation mingled with Neoproterozoic mafic rocks. This structure belt experienced multiple deformations. The main event was the southward thrusting ductile deformation occurring in relatively weak position within internal layers of the Earth, which resulted from arc-continent (Yangtze Block) collision during Jinningian period. Mafic rocks in theZhangyuan structure belt, such as pillow-massive mafic lava, gabbro, diabase and etc. are associated closely in the space, and formed in a slowly spreading ridges environment of continental marginal ocean basin. They are characteristic of initial oceanic crust mafic rocks, suggesting that they are part of the western extension of ofFuchuanophiolite belt in southern Anhui province. The Zhangyuan structure belt and Neoproterozoicvolcano-sedimentation formation distributed on both sides of the belt formed in structure- sedimentary environment related to continental margin and tectonic plates. To the south was sedimentary system of rifting sea basin, and to the north was the sedimentary system related to the continental margin volcano arc. Therefore, the Zhangyuan structure belt is characteristic of abyssal-bathyal sedimentation. The Zhangyuan structure belt connects the Fuchuanophiolite belt in northeast and Jingdezhen-Yifeng deep-large fault in southwest, and constituted an important part of subduction- collision collaged belt of continental margin oceanic basinin the northern margin of Jiangnanorogenduring Early Neoproterozoic, which isrepresented by the Fuchuanophiolite belt.关键词
江南造山带北缘/鄣源构造带/古缝合带/新元古代早期Key words
northern margin of Jiangnanorogen/ Zhangyuan structure belt/ ancient suture zone/ Early Neoproterozoic引用本文复制引用
张彦杰,廖圣兵,周效华,余明刚,蒋仁,姜杨,朱清波,黄文成..江南造山带北缘鄣源构造带主要地质特征[J].地质学报,2012,86(12):1905-1916,12.基金项目
本文为中国地质调查局"安徽1∶5万平里、江潭、瑶里、虹关幅区调"项目(1212010610609)和"晋宁期—加里东期构造岩浆活动及构造格局演变对区域成矿作用的制约"项目(1212011121097)共同资助的成果. （1212010610609）
