摘要
本文选取巴颜喀拉山群复理石沉积中砂岩、粉砂岩样品,进行主量元素地球化学分析,并利用分析结果对其物源区沉积大地构造背景进行判别。结果显示,晚三叠世巴颜喀拉山群物源主要来自大洋岛弧,少量来自大陆岛弧,表明当时研究区处于邻近大洋岛弧的周缘前陆盆地环境。
On the 1/250000 regional geology investigation, Sandstone and siltstones samples were collected from the flysch of the Bayanhar group to make major element geochemical analysis for tectonic setting discrimination. The result of this research indicates that the te.etonic setting where the provenance is most from the oceanic island arc and a few from the continental island arc, the studying area is a basin round oceanic island arc.
出处
《华南地质与矿产》
CAS
2006年第1期54-58,共5页
Geology and Mineral Resources of South China
基金
中国地质调查局基础地质调查项目(编号200313000006)
国家自然科学基金项目(NO.40372004)资助
关键词
晚三叠世
巴颜喀拉山群
主量元素
构造背景
大洋岛弧
青海省
late Triassic
Bayanhar group
major element
Tectonic setting
oceanic island arc
Qinghai province
