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 School of Geosciences,China University of Petroleum(East China),Qingdao 266580,Shandong
2 College of Geosciences,China University of Petroleum(Beijing),Beijing 102249
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.
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.
Cite this article:
Yu Kuanhong,Jin Zhenkui,Li Guizai et al. Conglomerate characteristics and alluvial fan evolution of the Triassic Lower Karamay Formation in Karamay Oilfield,Junggar Basin[J]. JOPC, 2015, 17(2): 143-159.
Yu Kuanhong,Jin Zhenkui,Li Guizai et al. Conglomerate characteristics and alluvial fan evolution of the Triassic Lower Karamay Formation in Karamay Oilfield,Junggar Basin[J]. JOPC, 2015, 17(2): 143-159.
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