| 鄂尔多斯盆地白垩系洛河组风成砂岩地球化学与物源区特征:以靖边县龙洲乡露头为例 |
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| 引用本文： | 朱欣然,刘立,贾士琚,李睿祺,宫昀迪.鄂尔多斯盆地白垩系洛河组风成砂岩地球化学与物源区特征:以靖边县龙洲乡露头为例[J].世界地质,2018,37(3):702-711. |
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| 作者姓名： | 朱欣然 刘立 贾士琚 李睿祺 宫昀迪 |
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| 作者单位： | 吉林大学 地球科学学院, 长春 130061 |
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| 基金项目： | 国家自然科学基金项目（41572082）资助. |
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| 摘 要： | 通过镜下观察,岩石常量元素、稀土微量元素含量测定等手段对鄂尔多斯盆地白垩系洛河组风成砂岩进行实验分析,研究其地球化学和物源区特征。确定洛河组风成砂岩地球化学岩石类型为长石砂岩和亚长石砂岩,沉积物的成熟度较高;物源区为被动大陆边缘构造背景占主导地位的再旋回造山带,并含有大陆岛弧的特性;沉积物母岩为变质岩、沉积岩,并含少量的酸性、中基性岩浆岩;物源区气候寒冷干旱,为氧化环境,化学风化程度低。
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| 关 键 词： | 鄂尔多斯盆地 洛河组 风成砂岩 地球化学性质 物源区特征 |
| 收稿时间： | 2018-01-30 |
| 修稿时间： | 2018-06-15 |
Geochemical and provenance characteristics of eolian sandstone of Cretaceous Luohe Formation in Ordos Basins: an example from outcrop in Longzhou,Jingbian |
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| ZHU Xin-ran,LIU Li,JIA Shi-ju,LI Rui-qi,GONG Yun-di.Geochemical and provenance characteristics of eolian sandstone of Cretaceous Luohe Formation in Ordos Basins: an example from outcrop in Longzhou,Jingbian[J].World Geology,2018,37(3):702-711. |
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| Authors: | ZHU Xin-ran LIU Li JIA Shi-ju LI Rui-qi GONG Yun-di |
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| Institution: | College of Earth Sciences, Jilin University, Changchun 130061, China |
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| Abstract: | The microscopic observation, analysis of major elements, trace and rare earth elements were used to study the geochemical and provenance characteristics of eolian sandstones from Cretaceous Luohe Formation in Ordos Basin. The rock type of eolian sandstones were determined to be arkoses and subarkoses, and the sediments were relatively mature. The provenance was in a recycled orogen dominated by the passive continental margin tectonic background with characteristics of continental arc. The parent rocks of sandstones from the Luohe Formation were confirmed to be metamorphic rocks, sedimentary rocks as well as a small amount of acid and intermediate-basic igneous rocks. The paleoclimate of the provenance was determined to be a cold and arid oxidizing environment with weak chemical weathering. |
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| Keywords: | Ordos Basin Luohe Formation eolian sandstone geochemical characteristics provenance |
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