关键词: 中国陆壳, 火山活动, 有机生烃, 合成生烃, 岩石化学无机生烃, 幔源烃

Abstract: As a solely continental crust with compressive stess on all sides in global nine continental crusts, Chinese continental crust features widespread and the most active volcanic activity, hence it is main area of intraplate seismicity in the world. In view of analysis of C, H contents in Chinese continental crust, they are higher than Clarke value of global average content. This means the hydrocarbons composed of such C and H should be also higher than the average hydrocarbon content in global continental crust. Meanwhile, it is the active volcanic activity that becomes one of positive causes for Chinese continental crust should be in hydrocarbon enichment, of which it contributes the kitchen model for hydrocarbon generation for organic source mechanism; its hydrothermal fluid contributes the catalytic model for hydrocarbon generation; its mantle-derived CO2 and H2 contribute compound mec hanism for hydrocarbon generation; its hydrot hermal water contributes the inorganic carbon compound model for hydrocarbon generation, and it also directly contributes mantle-derived hydrocarbons. 'Therefore, Chinese continental crust as a hydrocarbon- enriched one should be reasonable. In addition, higher C, H contents in Chinese sodimentary rocks than the average of global statistic va lues support the viewpoint that Chinese continental crust and upper continental crust should also be of hydrocaubon-eniched materials. In 2002, a new Yumen oil region was found in its basinal basement rock after 70-year development histary, which indicates that the deep continental crust () of China still have a great deal of oil-gas resourcs to be explored and discovered.

Key words: Chinese continental crust, volcanic activity, organic hydroc arbon generation, compound hydrocarbon generation, inorganic hydrocarbon generation, mantle-derived hydrocarbon