The interpreted of the sources rock of Late Permian to Early Triassic in the Shiwandashan Basin in Guangxi, China suggest that there is a good correlation between the content of organic carbon and the content of iron element in the argillaceous facies of the shallower shelf.

Integrating the soil map,land use status quo map and district map of Chongqing karst area,the index of soil organic abundance were introduced and the characteristic of soil organic distribution in different soil and landscapes were analyzed.

An evaluation of Ordovician hydrocarbon source rock and its lower limit of organic abundance in Dagang area,Huanghua depression;

The restitution methods of the organic abundance are classified systematically based on the comprehensive analyses of these methods,and the advantages and disadvantages,as well as the applicable conditions of these methods are comprehensively compared.

Through organic carbon content,chloroform bitumen 'A' content and vitrinite reflectivity,the authors synthetically estimate the developed status of the area in Upper Paleozoic about source rocks thickness,organic abundance,organic type and the thermal evolution according to the geochemistry analysis on the hydrocarbon source rocks.

In the paper, advances on the classification of maceral, maturity, type and abundance of organic matter, hydrocarbon generation, migration and accumulation have been reviewed.

The authors summarized four main research respects about Lower Paleozoic marine carbonate rocks: (1) abundance and its affecting factors of organic matter; (2) existing forms of organic matter;(3) recovering methods and theories of the abundance of organic matter and hydrocarbon-generating potential; and (4) research on thermal maturity of marine carbonate rocks.

Beipiao group hydrocarbon material distribution and organic matter abundance of Jinlingsi—Yangshan basin in western part of Liaoning;

Based on a comprehensive study of the organic geochemical features of the marine Ordovician source rocks on the western margin of Ordos Basin, their hydrocarbon generation potentials are evaluated through systematic geochemical analysis and correlation of samples with different lithologies, organic matter abundance and maturities.

Beginning with the survey of regional geology, this paper analyzes the geochemical characteristic of source rock, as well as organic matter abundance, maturity and geology evolvement in Lower Paleozoic, Ordos Basia In combination with the geology logging data of Taba temple Block, better gas shows was found in the third member of lower Majiagou formation in Paleozoic.