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| Interface division and characteristics of the rocks density in the Northern Jiangsu Basin |
| XU Jianchun, Wu Chengping, LI Wenyong, WANG Xin |
| China Aero Geophysical Survey and Remote Sensing Center for Land and Resources, Beijing 100083, China |
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Abstract Study on the density differences of different geological bodies is the geophysical precondition of gravity exploration. The division of density interface has a close relationship with the division of structural layers, and the determination and analysis of the strata (rocks) density is the important content of gravity exploration. On the basis of the density data of the outcrop rocks in the Northern Jiangsu Basin and the adjacent areas,the authors collated and summarized the rocks in the study area by division of the strata and intrusive rocks. And the vertical strata was divided into three super density layers (Cenozoic, Jurassic-Cretaceous and Archaean-Triassic), including two Ⅰ density interfaces and three Ⅱ density interfaces. Through the comprehensive analysis of strata density characteristics, the authors expatiated the relationship between the density characteristics of the strata and intrusive rocks and the gravity anomaly in gravity data interpretation, which provided a reliable precondition and basis for the gravity interpretation and oil exploration in the basin. The division of density interface has a close relationship with the regional structure and reservoir structure, and calculating the density interface or depth changes has a great significance in the regional structure research and petroleum exploration.
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Received: 07 July 2016
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2017, Vol. 4 
