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- W2155655785 abstract "Potential field geophysical data sets for the Coolabah 1:100 000 map sheet area (60 km east of Cobar) were interpreted to better understand poorly exposed bedrock as part of a regional mapping project by the Geological Survey of New South Wales. The map area includes historic and present-day copper mining of VHMS deposits in the Girilambone district and at Tritton mine. Information on the distribution and depth extent of mafic, ultramafic, and exhalative rocks is sought using regional aeromagnetic and gravity data.Multi-scale edge analysis gradients and upward continuation filtering for both gravity and magnetic data provided preliminary ideas on the nature of anomaly sources in basement. Near-surface magnetic anomalies were reconciled with mapped lithologies and magnetic susceptibilities, and then magnetic sources defined using an iterative process of initial forward models, inversion of selected parameters, and resulting adjustment of the forward model. The results of magnetic and gravity modelling across the Coolabah map sheet (in the Tritton Mine area) were used to assist in the construction of geological cross-sections.Correlations between near-surface magnetic sources and deeper gravity sources are good for ultramafic rocks and quartz-magnetite-hematite rocks in the southeast quadrant of the map area, but the two data sets are more difficult to reconcile elsewhere. The resulting modelling indicates complex steeply dipping stratigraphy (including narrow mafic and ultramafic rocks near to surface), and a high density basement unit (possibly a large mafic intrusion) below a depth of five kilometres." @default.
- W2155655785 created "2016-06-24" @default.
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- W2155655785 date "2013-12-01" @default.
- W2155655785 modified "2023-10-09" @default.
- W2155655785 title "Potential field modelling of mafic and exhalative rocks in the Girilambone- Tritton mine area, western NSW" @default.
- W2155655785 cites W2071821593 @default.
- W2155655785 doi "https://doi.org/10.1071/aseg2013ab243" @default.
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