| 准噶尔盆地克拉玛依油田三叠系克下组洪积砾岩特征及洪积扇演化 |
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| 引用本文： | 余宽宏,金振奎,李桂仔,何苗,郭秀娟,杨婷.准噶尔盆地克拉玛依油田三叠系克下组洪积砾岩特征及洪积扇演化[J].古地理学报,2015,17(2):143-159. |
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| 作者姓名： | 余宽宏 金振奎 李桂仔 何苗 郭秀娟 杨婷 |
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| 作者单位： | 1.中国石油大学(华东)地球科学与技术学院,山东青岛 266580;2.中国石油大学(北京)地球科学学院,北京 102249 |
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| 基金项目： | 山东省自然科学基金青年基金(编号:ZR2014DQ016)和中国石油大学(华东)科研启动基金(编号:Y1301058)共同资助 |
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| 摘 要： | 通过岩心观察,将克拉玛依油田三叠系克下组砾岩分为杂基支撑角砾岩(砾石成分同基岩)、弱胶结砾岩(严格意义上未胶结成岩)、泥质杂基支撑砾岩、砂砾质支撑砾岩和分选极好的细砾岩几种类型。通过岩心岩石特征与现代洪积扇沉积物特征对比,确定了每一类砾岩的形成环境。克下组沉积早期,气候干旱,洪积扇为干旱型,可与现代扎伊尔山山麓洪积扇(堆)沉积物特征相类比。克下组沉积后期气候变得潮湿,洪积扇类型逐渐转变为以河流作用为主,可与阜康市白杨河洪积扇沉积物特征相类比。克下组洪积扇在垂向上为向扎伊尔山后退的沉积序列。
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| 关 键 词： | 克拉玛依油田 三叠系 克下组 洪积扇 砾岩 |
| 收稿时间： | 2013-12-24 |
Conglomerate characteristics and alluvial fan evolution of the Triassic Lower Karamay Formation in Karamay Oilfield,Junggar Basin |
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| Yu Kuanhong,Jin Zhenkui,Li Guizai,He Miao,Guo Xiujuan,Yang Ting.Conglomerate characteristics and alluvial fan evolution of the Triassic Lower Karamay Formation in Karamay Oilfield,Junggar Basin[J].Journal of Palaeogeography,2015,17(2):143-159. |
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| Authors: | Yu Kuanhong Jin Zhenkui Li Guizai He Miao Guo Xiujuan Yang Ting |
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| Institution: | 1.School of Geosciences,China University of Petroleum(East China),Qingdao 266580,Shandong;2.College of Geosciences,China University of Petroleum(Beijing),Beijing 102249 |
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| Abstract: | Based on core observation,five types of conglomerates are divided in the Triassic Lower Karamay Formation,Karamay Oilfield,i.e., the matrix-supported breccias,weak-cemented conglomerates(strictly speaking,this type is still uncemented),mud-supported conglomerates,sand-supported conglomerates and well sorted granule-conglomerates. Compared to the sediments of modern alluvial fans,the depositional environment of each conglomerate in the Lower Karamay Formation can be determined as following:in the early stage,due to all arid climate,the conglomerates have similar characteristics to that of modern arid alluvial fans in Zaier Mountain area. However,in the late stage a humid climate prevailed, and the fluvial process become dominant, with the deposited conglomerates showing similar characteristics to that of Baiyanghe alluvial fans in Fukang. So,vertically,the alluvial fans showed a retrogradational sequence towards the ancient Zaier Mountain. |
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| Keywords: | Karamay Oilfield Triassic Lower Karamay Formation alluvial fans conglomerates |
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