古地理学报 ›› 2015, Vol. 17 ›› Issue (2): 143-159. doi: 10.7605/gdlxb.2015.02.013

• 岩相古地理学及沉积学 •    下一篇

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

余宽宏1,2,金振奎2,李桂仔2,何苗2,郭秀娟2,杨婷2   

  1. 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
  • 收稿日期:2013-12-24 修回日期:2014-05-27 出版日期:2015-04-01 发布日期:2015-04-01
  • 作者简介:余宽宏,男,1983年生,博士,中国石油大学(华东)地球科学与技术学院讲师,沉积学专业。E-mail: yukuanhong1983@126.com。
  • 基金资助:

    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

Conglomerate characteristics and alluvial fan evolution of the Triassic Lower Karamay Formation in Karamay Oilfield,Junggar Basin

Yu Kuanhong1,2, Jin Zhenkui2, Li Guizai2, He Miao2, Guo Xiujuan2, Yang Ting2   

  1. 1 School of Geosciences,China University of Petroleum(East China),Qingdao 266580,Shandong
    2 College of Geosciences,China University of Petroleum(Beijing),Beijing 102249
  • Received:2013-12-24 Revised:2014-05-27 Online:2015-04-01 Published:2015-04-01
  • About author:Yu Kuanhong,born in 1983,doctor,is a lecturer in School of Geosciences,China University of Petroleum (East China). His academic interests are focused on sedimentology. E-mail: yukuanhong1983@126.com.

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。

关键词: 克拉玛依油田, 三叠系, 克下组, 洪积扇, 砾岩

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.

Key words: Karamay Oilfield, Triassic, Lower Karamay Formation, alluvial fans, conglomerates

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