Yangibana Geology

The dominant lithologies in the tenement area are granites of the Durlacher Supersuite. Rafts of older sedimentary rocks occur within these intrusives.

The primary mineralisation targets within the Yangibana Project are narrow, discontinuously but regionally extensive outcropping ironstone dykes that carry anomalous rare earths associated with monazite mineralisation. The project also has the potential for as yet untested rare earths mineralisation associated with deeper carbonatite bodies.

Previous exploration at Yangibana has included reverse circulation drilling in the 1980s at a number of prominent targets, all now within Hastings’ current tenements, and on the basis of this drilling a non-JORC resource of 3.5 million tonnes at 1.63%TREO was estimated by a previous explorer. The vast majority of this resource lies in the near surface oxidised zone.

The ironstones are now considered to be a younger intrusive phase that has cut across slightly older ferrocarbonatite dykes, possibly leaching and upgrading rare earths (and base metals) from them. The carbonatite dykes themselves, along with the associated fenitic alteration, are considered to be sourced from an as yet undiscovered carbonatite intrusion which could potentially host significant rare earths and possibly base metals. Hastings tenements now total almost 650 sq km, covering the bulk of the Gifford Creek Carbonatite Complex.

Hastings has completed six drilling programmes at the Yangibana Project, testing a number of targets throughout its major tenement holding.

On this basis of this drilling a JORC Resource estimation has been completed by independent consultant Lynn Widenbar and Associates Pty Limited and this was reported in October 2017.

The current total diluted resources for the Yangibana Project are:-

Category

Tonnes

Nd2O3+Pr6O11

TREO

Nd2O3

Pr6O11

    %

%

ppm

ppm

Measured

3,792,000

0.42

1.18

3,350

840

Indicated

8,240,000

0.43

1.27

3,410

870

Inferred

8,527,000

0.37

1.11

2,900

760

TOTAL

20,559,000

0.40

1.18

3,190

820



yangibana geology

Regional geology, Gifford Creek Ferro-Carbonatite Complex, showing main ironstone prospects