Abstract Determining overprinting relationships in the geological record has underpinned our understanding of the evolution of the Earth and has provided the context in which to interpret geoscientific datasets. Geological overprinting relationships are generally determined from outcrop relationships. When outcrop is absent or limited, overprinting relationships using geological observations is often ineffective or ambiguous. We show how aeromagnetic data can be used to inform superposition of geological structures using a combination of folded stratigraphy, faults (both high angle and low angle), and plutons from the well-exposed Hill End Trough, in the Phanerozoic eastern Lachlan Orogen. Overprinting relationships reveal episodic inversion of the Late Silurian to Early Devonian back arc basin succession, preserved within the Hill End Trough, occurred during superimposed shortening events. The first event resulted in the development of regional folds associated with the Tabberabberan Orogeny and the second event resulted in the development of overprinting north-south and north-northwest trending faults during the Early Carboniferous Kanimblan Orogeny. Inversion structures are overprinted by a Carboniferous granite, which is overprinted by previously unrecognised northeast- and northwest conjugate faults, which we interpret to be related to the Permo-Triassic Hunter Bowen Orogeny.

中文翻译：

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根据区域航磁数据确定的结构叠印标准：以东冈瓦纳的 Hill End 海槽为例

摘要 确定地质记录中的叠印关系巩固了我们对地球演化的理解，并提供了解释地球科学数据集的背景。地质叠印关系一般由露头关系确定。当露头不存在或有限时，使用地质观察的叠印关系通常是无效的或模棱两可的。我们展示了如何使用航磁数据通过褶皱地层、断层（高角度和低角度）和来自显生宙东部拉克兰造山带的暴露良好的 Hill End 海槽的岩体的组合来告知地质结构的叠加。叠印关系揭示了晚志留世到早泥盆世后弧盆地序列的偶发反转，保存在 Hill End 海槽内，发生在叠加的缩短事件期间。第一个事件导致了与 Tabberabberan 造山运动相关的区域褶皱的发展，第二个事件导致了早石炭世 Kanimblan 造山运动期间重叠的南北和北西北向断层的发展。反转结构被石炭纪花岗岩叠印，后者被以前未被认识的东北和西北共轭断层叠印，我们认为这与二叠纪-三叠纪亨特博文造山带有关。