Characteristics and influencing factors of contour current deposits in the Upper Ordovician Zhaolaoyu Formation in Fuping area of Shaanxi Province
Huang Wei1, 2, He Youbin1, 2, Li Hua1, 2, Liu Zhuruizhi1, 2
1 Key Laboratory of Exploration Technologies for Oil and Gas Resources,Ministry of Education,Yangtze University,Wuhan 430100,Hubei; 2 School of Geosciences,Yangtze University,Wuhan 430100,Hubei
Abstract The Upper Ordovician Zhaolaoyu Formation in Fuping area of Shaanxi Province developed contour current deposits. On the basis of the section measured in field survey,the smooth surface rock,rock thin sections and geochemical data,integrated with previous researches,the authors carried out detailed studies of the types of contourites,the contourite sequences and the influencing factors of contour current deposits. The results show that: (1)The contourites can be classified into two types,i.e. the calcilutitic contourite and the calcisiltitic contourite, and two types of contourite sequences were identified,a single contourite sequence and a calcisiltitic-calcilutitic contourite sequence;(2)As the temperature of contour current water mass gets lower and the salinity gets higher,the contour current strength becomes greater;(3)When the temperature of contour current water mass changes from high to low,then to high, and the salinity of the contour current water mass changes from low to high,then to low, the contourite sequences changes from fine to coarse and then to fine;(4)Larger palaeowater depth,drier and hotter paleoclimate,and lower paleosalinity were favorable for the development of contour current and contour current deposits.
Fund:Funded by National Nature Science Foundation of China(Grant No.41472096)
About author: About the first author Huang Wei,born in 1989,master candidate,majors in mineral prospecting and exploration. E-mail: hw1204740478@163.com.About the corresponding author He Youbin,born in 1964,professor,is mainly engaged in the teaching and research of sedimentology. E-mail: heyoubin@yangtzeu.edu.cn.
Cite this article:
Huang Wei,He Youbin,Li Hua et al. Characteristics and influencing factors of contour current deposits in the Upper Ordovician Zhaolaoyu Formation in Fuping area of Shaanxi Province[J]. JOPC, 2017, 19(1): 161-174.
Huang Wei,He Youbin,Li Hua et al. Characteristics and influencing factors of contour current deposits in the Upper Ordovician Zhaolaoyu Formation in Fuping area of Shaanxi Province[J]. JOPC, 2017, 19(1): 161-174.
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