论文部分内容阅读
本文对已有的地球物理场资料、地壳与上地幔结构的概略展布以及青藏高原的大地构造格局进行了综合分析。结果表明:该区沉积层巨厚,重力场表现为负异常,地壳底部与上地幔顶部相对周边造山带上隆,低速异常分布,地幔对流向生此向下聚集.这些要素提出:羌塘盆地具有构成新油气田的深部构造背景和地球物理场特征。基于这些初步认识,文中最后提出了对该盆地进行深化研究的建议
In this paper, the existing geophysical data, the rough distribution of the crust and the upper mantle structure and the tectonic framework of the Qinghai-Tibet Plateau are analyzed comprehensively. The results show that the sediments in this area are very thick and the gravitational field shows a negative anomaly. The upper and lower anomalous distributions of the surrounding orogenic belts on the top of the crust and the top of the upper mantle are congruent, and the mantle convection flows downward to accumulate. These elements suggest that the Qiangtang Basin has the characteristics of deep tectonic setting and geophysical properties that constitute a new oil and gas field. Based on these preliminary findings, the paper finally put forward suggestions for deepening the study of the basin