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裂谷作用是一种使地壳裂开的动力学过程.断裂谷发展过程的一个基本特征是基性和超基性岩浆顺着裂谷的轴部成岩墙式的渐进侵入作用.这些岩墙的不同发展阶段反映在重力和磁力异常上.这些方面的研究则可识别古裂谷系和大陆边缘性质.根据对南澳大利亚元古代Ad_e—laide地槽的重力与磁力的数据分析,可以鉴定出它应属于大西洋型被动大陆边缘.在在南澳大利亚西部,广泛展布的弯弯曲曲的重力与磁力异常符合带表明,这是尚未发育成地壳裂开的元古代的古裂谷系.
Rift is a dynamic process that causes crustal crustal breakup.An essential feature of fault valley development is the progressive intrusion of basic and ultrabasic diagenetic walls along the axis of the rift. The different stages of development are reflected in gravity and magnetic anomalies, and studies in these areas identify the ancient rift valleys and the marginal continental margins.According to the data analysis of gravity and magnetic force of the Paleoproterozoic Ad_e-laide trough in South Australia, it can be identified Should belong to the margin of the Atlantic passive continental margin.While the wide range of curved and overlapping gravity and magnetic anomalies coincidentally displayed in the western part of South Australia indicate that this is an ancient Proterozoic rift system that has not yet developed into crustal dehiscence.