A regional scale gravity survey of the Southern Cross Greenstone Belt, Western Australia
MetadataShow full item record
A case study is presented from the Southern Cross Greenstone Belt, Western Australia, where regional scale gravity data have been collected in order to study the belt and associated granitoid bodies. Differential Global Positioning System (GPS) satellite surveying techniques have been used to coordinate the gravity observations, and automated processing techniques, such as terrain corrections based on digital elevation models (DEMs), have been used as part of the study. These approaches greatly reduce the manual effort and time needed to collect and process the gravity data. While the use of GPS methods introduces further considerations in data reduction, such as the geoid-spheroid separation, it can provide up to a 250% increase in efficiency in the field while collecting survey data. The computer based terrain correction calculation using a DEM provides a considerable saving in the time expended on data reduction. With the introduction of such field practices and reduction methods, gravity as a semi-regional scale exploration tool is becoming more attractive. The present study has shown that station spacings of 1 km should be considered a maximum when working on the semi-regional scale (50?60 km square areas), with closer station spacings (500 m maximum) more appropriate close to expected geological contacts.
Showing items related by title, author, creator and subject.
A new degree-2190 (10 km resolution) gravity field model for Antarctica developed from GRACE, GOCE and Bedmap2 dataHirt, Christian; Rexer, M.; Scheinert, M.; Pail, R.; Claessens, Sten; Holmes, S. (2015)The current high-degree global geopotential models EGM2008 and EIGEN-6C4 resolve gravity field structures to ~10 km spatial scales over most parts of the of Earth’s surface. However, a notable exception is continental ...
Chenrai, Piyaphong (2008)The Comet Gold Mine is in the Murchison mineral field which lies within the Yilgarn Craton of Western Australia. Several different geophysical methods were used in this study to define the geophysical signatures of ...
Anjasmara, Ira Mutiara (2008)Gravity Recovery and Climate Experiment (GRACE) mission has amplified the knowledge of both static and time-variable part of the Earth’s gravity field. Currently, GRACE maps the Earth’s gravity field with a near-global ...