Resistivity model derived from magnetotellurics: AusLAMP-TISA project

The Australian Lithospheric Architecture Magnetotelluric Project (AusLAMP) aims to collect long period magnetotelluric data on a half degree (~55 km) grid across the Australian continent. New datasets have been collected in Northern Australia, as part of Geoscience Australia’s Exploring for the Future (EFTF) program with in-kind contributions from the Northern Territory Geological Survey and the Queensland Geological Survey. This release includes preliminary AusLAMP models in an under-explored region between Tennant Creek in the Northern Territory and Cloncurry in Queensland. Long period magnetotelluric data from 155 sites were used in this model. Magnetotelluric data acquisition in this region continues. The preliminary model results provide new insights to the lithospheric architecture and mineralisation in the region. There is a connection between conductive anomalies, large-scale lithospheric boundaries and the distribution of mineral deposits.

澳大利亚岩石圈结构大地电磁（magnetotelluric）项目（Australian Lithospheric Architecture Magnetotelluric Project, AusLAMP）旨在以半度（约55公里）的网格间距，在整个澳大利亚大陆范围内采集长周期大地电磁数据。作为澳大利亚地球科学局（Geoscience Australia）“未来勘探（Exploring for the Future, EFTF）”计划的组成部分，北领地地质调查局与昆士兰州地质调查局以实物支持的形式，在澳大利亚北部完成了新一批数据集的采集工作。本次发布的内容涵盖北领地坦南特克里克与昆士兰州克隆柯里之间勘探程度较低区域的初步AusLAMP模型。本次建模共使用了来自155个测点的长周期大地电磁数据。该区域的大地电磁数据采集工作仍在持续推进中。该初步模型成果为该区域的岩石圈结构与成矿作用提供了全新的科学认知。导电异常体、大型岩石圈边界与矿床分布三者之间存在明确关联。