【作者】 周文虎； 祝恒宾；

【Author】 Zhou Wenhu Zhu Hengbin (Institute of Geophysics,Chinese Academy of Sciences)

【机构】 中国科学院地球物理研究所；

【摘要】 本文利用作者在郯庐断裂带中段地区布设的三条重力剖面以及有关的重力资料,分析了该地带的重力异常特征;计算了地壳厚度.结果表明:沿断裂带中段未形成一条完整的重力梯级带;在其两侧,重力异常与地壳构造差异较明显;在该断裂带存在着轴部重力高与地壳减薄.结合地质研究成果,讨论了造成该断裂带重力异常与地壳构造特征的可能原因.更多还原

【Abstract】 Based on the 3 gravity profiles set up along the central segment of the Tancheng-Lujiang fault and related gravitational data,the gravity anomaly features are analyzed,then the crustal thickness is calculated for this fault zone.Result of the study shows that forrnationing of a gravitational gradient zone is not yet completed along the central segment of the fault zone,and that difference between gravity anomalies and the crustal structure are obvious along both sides of this fault segment.Higher gravity values and thinner crust can be found at the axial localities of the fault zone.Finally,the possible reasons responsible for the gravity anomalies and the crustal structural differences of the Tancheng-Lujiang fault zone is discussed referring to the results of geological studies.更多还原