3D Geological Model of North Gawler Province - Understanding and modelling potential field anomalies.

This model was produced by The South Australian Centre for Mineral Exploration Under Cover (CMXUC), a collaborative research initiative of the Government of South Australia and the University of Adelaide.In this area, basement is buried beneath Neoproterozoic-Recent cover, of the Eastern Officer, Arckaringa and Eromanga Basins. The depth to basement horizon, shows the complex geometry of the Munyarai Trough which forms a foreland to the uplifted Musgrave Block; the Marla Overthrust Zone and Ammaroodinna Ridge which were uplifted after the deposition of Cambrian to Silurian sedimentary rocks; the Middle Bore Fault Zone which was last active during deposition of the Arckaringa Basin and the Wintinna Trough.Large potential field anomalies have been observed in the Marla Region of Northern South Australia and have been used to define the northern limit of the Gawler Craton. This project’s aim was to model the source of those anomalies in order to understand the sources of those anomalies.

本模型由南澳地下矿产勘探中心（The South Australian Centre for Mineral Exploration Under Cover, CMXUC）研发，该中心是南澳州政府与阿德莱德大学联合发起的研究项目。本研究区域内，基底被东奥菲尔盆地、阿卡林加盆地与埃罗曼加盆地的新元古代-现代覆盖层所掩埋。基底埋深数据揭示了穆尼亚赖海槽的复杂几何形态——该海槽为抬升的穆斯格雷夫地块的前陆构造；同时还显示了马尔拉逆冲带与阿莫鲁迪纳隆起，二者均在寒武纪至志留纪沉积岩沉积后抬升；以及末次活动于阿卡林加盆地沉积期的中钻孔断裂带与温蒂纳海槽。南澳北部马尔拉地区已观测到大型位场异常，这些异常被用于界定高勒克拉通的北界。本项目旨在对这些异常的成因开展建模研究，以探明其异常源头。