Legacy product - no abstract available

Legacy product - no abstract available

abstract

Legacy product - no abstract available

Legacy product - no abstract available

Legacy product - no abstract available

Langoora 1 well was drilled by West Australian Petroleum Pty Ltd about 50 km east of Derby on a seismic anomaly thought to be associated with a Devonian reef complex. From the well completion report (WCR, Gardner 1963), Langoora 1 investigated the hydrocarbon potential of the Early Carboniferous Laurel Formation and the suspected Devonian reef complex. Drilling showed that the Devonian section sat uncomformably on Precambrian schists without any intervening reef complex. The well intersected Triassic (Blina Shale), and some Permian (Liveringa, Noonkanbah, and Poole Sandstone), before the first core was taken within the top of the Early Permian, Nura Nura Member (Fig. 1). Palynological samples from the well were analysed and reported on by Fowler (1963a,b), and forams were retrieved from the lowest core above Precambrian basement (McTavish 1963) . We summarise and update the information from these reports, based on other pUblished and unpublished sources, but also on a re-examination of some palynomorphs in the original slides (see Appendix).

Examination of samples from· Arabella No.1, Candace No.1 and Kybra No.1, offshore Carnarvon Basin, Western Australia, for Triassic conodonts.

This summary of biostratigraphic data derived from Blackstone No. 1 well is based on the well completion report (Johnson 1968), and various other published and unpublished sources which update the original information. No samples have been re-examined. This well is important in that it formed the basis for the informal palynological zonation for the Permian presented by B.E. Balme in Kemp et al. (1977). The type section for the' Poulton Formation of Playford et al. (1975) is also in Blackstone #1.

This report summarises new petrological, geochemical and geochronological data on the Mount Webb Granite and the felsic volcanics of the Pollock Hills Formation of the western Amnta Block. The new data confirms that this magmatic system has many similarities to other granites in other Australian Proterozoic regions where hydrothermal Au-Cu deposits have been linked to a magmatic source (Pine Creek, Eastern Mount Isa Inlier, Tanami, etc.). The key significant data are the primary chemistry of the units, the alteration present in descriptions and evidence of hydrothermal interaction with the local country rocks.