[1] (1) Groupe Franeais d,Etudes des Carbones(G.F.E.C.) ,1965,in/lLesCarbones,l,1.469,Masson,ed.Paris.

(2) Claypool,G.E.andKaplan,I·R.,1975,in“NaturalGasesinMarineSedientsl/,Kaplan,1.R.,ed.New York,plenum,99.

(3) Durand,B.1979,"Kerogen-Insoluble Organie Matter from Sedientary Roeks"

(4) Fan Pu,et al.,1980,Evolution of Kerogen in the Oil一Gas Formation in the Palaeozoic Sediments of Shanxi一Gansu一Ningxia Basin’,in“Oil and GasGeology,Vol.1,pp48一65.

(5) FanPu,et al.,1980,The Foration and Evolution of the Palaeozoie Oil and Gas in Large Sedimentar Basins in the North China Platform,“Geoehemi-stry,No.2,pp149一159.