The organic matter features of the Laiyang Group in Lingshan Island were systematically studied by means of sedimentology

sedimentary geochemistry and organic geochemistry and integrating with typical outcrop observation in Lingshan Island

Laoshan Yakou-Baxiandun area and Jiaolai Basin and the previous research on the elemental geochemistry of Lingshan Island and the organic geochemistry of Jiaolai Basin. In Jiaolai Basin

the terrestrial strata of fluvial and lacustrine facies and alluvial fan facies were developed in the Early Cretaceous Laiyang period.The organic geochemistry studies on the deposits show that the source rock samples from the Shuinan section are mainly of saprolite(Type Ⅰ)and humus and saprolite (Type Ⅱ

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)

have entered the hydrocarbon generation threshold and are in the thermal mature stage;while in the Lingshan Island

LaoshanYakou-Baxiandun areas

marine strata dominated by deep sea gravity flow and deep water traction current deposits were developed in the Early Cretaceous Laiyang period.Meanwhile the elemental geochemical studies on siltstones and shales of Lingshan Island reveal that its sedimentary setting is a marine reducing environment

and the organic geochemical research shows that samples from Lingshan Island belong to the humic(Type Ⅲ)and humic and sapropel (Type Ⅱ

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)types in high to over mature stage

and the turbidites of Lingshan Island may have completed the process of hydrocarbon generation and expulsion.