摘要
对武当岩群中条带状“变基性岩”的暗色条带和浅色条带与区域上大面积分布的厚层状变基性火山岩和变酸性火山岩分别进行对比研究,结果表明,暗色条带与变基性火山岩、浅色条带与变酸性火山岩的岩石结构构造、矿物组成及岩石地球化学特征十分相似,均形成于岛弧环境,结合其变形特征,认为条带状“变基性岩”是由基性火山岩与酸性火山岩交互形成的原始成分层经强烈顺层剪切置换而成。
According to comparative study on fabric, mineral assemblages, petrogeochemical characteristics and geochemical features of the banded 'meta-basic rock' of Wudang Group with those of widespread meta-basic and meta-acidic volcanic rocks in Wudang region, the authors concluded in this paper that both the dark bands and the light-colored bands of the 'meta-basic rock' were formed in an island-arc setting and are similar to the meta-basic and meta-acidic volcanic rocks in the region, respectively, and they were resulted from strong bedding shearing and displacement of the primitive beds composed of alternate basic and acidic volcanic rock.
出处
《华南地质与矿产》
CAS
1999年第2期9-14,共6页
Geology and Mineral Resources of South China
基金
地质矿产部"九五"攻关项目
