Condie K C. 1991. Another look at rare earth elements in shales.Geochim. et Cosmochim. Acta, 55:2527～2531.
[8]
Donald E C. 1994. Factors influencing organic carbon preservation in marine sediments. Chemical Geology, 114: 315～329.
[9]
Haskin M A, Haskin L A. 1966. Rare earth in European shales: a redetermination. Science, 154: 507～509.
[10]
James G C. , Condie K C. 1993. Trace elementsas source indicators in cratonic sediments: A case study from the early Proterozoic Libby Creek Group,Southeastern Wyoming. Journal of Geology, 101:319～332.
[11]
Li Changnian. 1992. Trace element petrology in volcanic. Wuhan:China University of Geosciences Press, 179～182 (in Chinese).
[12]
Li Tong, Ni Shoubin. 1990. Chemical element abundance in Earth and Earth\'s Crust. Beijing: Geological Publishing House, 44～51(in Chinese).
[13]
Wu Chaodong, Yang Chengyun, Chen Qiying. 1999. The origin and geochemical characteristics of Upper Sinain- Lower Cambrian black shales in western Hunan. Acta Petrologica et Mineralogica,18(1) :26～39(in Chinese with English abstract).
[14]
Yu Bingsong, Chen Jianqiang, Li Xingwu, Lin Changsong. 2003.Geochemistry of black shale at the bottom of the lower Cambrian in Tarim basin and its significance for lithosphere evolution.Science in China (series D), 46 (5) : 498～507.
[15]
Zhao Zhenghua. 1997. Principle of trace element geochemistry.Beijing: Science Press, 183～204 (in Chinese).
Deng Hongwen, Qian Kai. 1990. Genetic types and association evolution of deep lacustrine facies mudstones. Acta Sedimentologica Sinica, 8 (3): 1～21 (in Chinese with English abstract).
[22]
Elana L L. 1993. Preservation of laminated shale in ancient clinoforms: comparison to modern subaqueous deltas. Geology,21 :359～362.
[23]
Hatch J R, Leventhal J S. 1992. Relationship between inferred redox potential of the depositional environment and geochemistry of the Upper Pennsylvanian (Missourian) Stark Shale Member of the Dennis limestone, Wabaunsee County, Kansas, U. S. A.Chemical Geology, 99: 65～82.
[24]
Jin Yugan,Wang Xiangdong,Shang Qinghua, Wang Yue. 1998. A new Permian chronostratigraphic scheme. Geological Review, 44(5) : 478～488 (in Chinese with English abstract).
[25]
Liu Yingjun, Cao Liming. 1987. Introduction to element geochemistry. Beijing: Geological Publishing House, 57～80 (in Chinese).
[26]
Wingnall P B, Hallam A. 1992. Anoxia as a cause of the Permian /Triassic mass extinction: facies evidence from northern Italy and the western United States. Paleogeography, Paleoclimate,Paleoecology, 93:21～46.
[27]
Yah Jiaxin, Xu Siping, Li Fanglin. 1998. Geochemistry of the dysaerobic sedimentary environment of the Qixia Formation in Badong Hubei. Sedimentary Facies and Palacogeography, 18(6):27～32 (in Chinese with English abstract).
[28]
Zhang Guojun, et al. 1993. The China records of petroleum geology (No. 15). Beijing:Petroleum Industry Publishing House, 15～25(in Chinese).
