- 责任者：Zhang Yanjie (Nanjing Center ; China Geological Survey ; Nanjing 210016 ; China) ; Zhou Xiaohua
- 刊名：Geological Journal of China Universities
- 出版年：2011
- 卷期：17(3)
- 关键词：基性岩 ; basic rocks ; 江南古陆 ; Jiangnan Old Land
- 页码：p.393-405
- 图表：13 illus., 4 tables, 34 refs.
- 分类号：0801
- issnNo：ISSN1006-7493
- isbnNo：CN32-1440/P
Zhangyuan mafic rocks of NE-SW trend are distributed along the Yaoli-Zhangyuan-Jiangtan line in the northern slope of Zhanggong Mountain, between Anhui and Jiangxi provinces. They occur as structural shivers and fragments in flysch matrix textured by Neoproterozoic volcano-fine clastic rocks of continental margin, and overall display characteristics of tectonic melange belt. Mafic fragments include altered pillow-block basic lava, gabbro, dolerite, etc, which were concomitant in space since the Neoproterozoic. By analyzing geological and geochemical characteristics of the Zhangyuan mafic rocks, their origin is considered to be in a small, slow expansion oceanic basin spreading ridge of the continental margin environment, with the features of primitive oceanic crust mafic rocks. It is proposed that Zhangyuan mafic rocks belong to westward extension of Fuchuan ophiolite in Southern Anhui province.