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Centurion

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Buxton’s Exploration License E80/5579 is located approximately 180 km south-southwest of Balgo Western Australia (

) on unclaimed crown land and accessible via shire roads and several 1960s-1980s seismic lines.

This license covers a prominent dipolar magnetic anomaly exceeding 1,500 nanoteslas in amplitude and 3,500 m by 5,000 m in extent.  The GSWA have recently released data from a 2017 Falcon airborne gravity gradiometer survey which reveals a similarly dipolar gravity high in a slightly offset position to the magnetic feature (

).  Such relationships between magnetic and gravity features is characteristic of Iron Oxide Copper Gold deposits including Olympic Dam and Prominent Hill.

Results from Magnetic Vector Inversion of open file 400 m line spaced magnetic data indicate that the target is remnantly magnetised and is approximately 700 metres below ground level (

CRA attempted to test the target with a drillhole in 1991, but abandoned the hole at 432.2m in the Canning Basin cover sequence.  CRA’s geologists noted that clasts within the congolmerates were “larger boulders of over 12cm toward base are predominantly pink feldspathic granite, also granodiorite/diorite, all intrusives are strongly pyritic some show propylitic chlorite alteration”.  These intervals returned the most anomalous Cu, Cr, Sb, Ce, Nb, Th and U of all the sampling.  The presence of boulder conglomerate suggests these were derived from a proximal basement high.

Buxton intends to drill test this exiting target once Heritage Agreements are finalised.

Figure 1: Regional location of Centurion tenement, E 80/5579.

Figure 2: Centurion Project summary geophysical target map showing CRA drillhole VE001, contoured 1VD airborne gravity gradiometer data from the recently released Kidson 2017 survey on GSWA’s open-file magnetic imagery. Note that the airborne gravity survey only partially covers the Exploration License.

Figure 3: Centurion Project cross section A-A’ (see Figure 1 for location).  The airborne magnetic data inversion by IGO Ltd is presented as shells with the historic CRA hole VE001 and an indicative planned hole BX001