中文摘要：

重力方法是区域地质构造研究的重要方法，通过重力异常线性构造分析可推断地下断裂、场源边界、不同地质体接触带等构造边界。本文研究重力异常线性构造分析的曲率属性方法。首先，分析了最大正曲率和最小负曲率表征的重力异常线性构造特征及问题，然后，有机融合这两种曲率的各自优点而改进提出了新的正负混合曲率，以增强重力异常线性构造特征，并揭示岩性分布特征。文中给出了正负混合曲率的具体算法流程，并利用理论模型重力异常数据和绍兴一萍乡断裂带及邻区实际布格重力异常数据作了试验验证。数据试验结果表明正负混合曲率法有效增强线性构造特征和岩性分布特征，有利于直观区分岩性密度高低分布和分析不同尺度线性构造特征，效果优于最大正曲率和最小正曲率。

英文摘要：

Gravity methods have in tectonic studies. Lineament been playing an important role analysis of gravity anomaly benefits in revealing buried faults, sources＂ boundaries or contact zone of different geological bodies. In this paper, we studied the curvature attributes approach for revealing lineaments of gravity anomaly. We first analyzed lineaments described by both most positive and negative curvatures and their existing problems. We then proposed a new approach, herein called as the hybrid positive-and-negative curvature, by combining the most positive and negative curvatures into one curvature and adjusting the advantages of the two curvatures. The new approach is used to improve lineaments and revealing lithological high-low distribution. We presented the principle and procedure of the new approach in details. Then we tested the new approach on both synthetic gravity anomaly data and real Bouguer gravity anomaly data around the Shaoxing Pingxiang fault zone in Southern China. The results show that the new approach effeetively enhances the lineaments of gravity anomaly and the characteristics of lithological distribution, better than those produced using the most positive and negative curvatures approaches. The new approach benefits in discriminating high- and low-density distribution intuitively and analyzing lineaments in multiple scales.