Partial Relinquishment Report Moline.

Abstract

Relinquished portions of EL 4492 near Moline, in the Pine Creek Geosyncline, were explored using aeromagnetic and reconnaisance geological methods. Significant gold or base metal mineralization was not found. The ground was covered by a 200 metre line-spaced, 80 metre sensor height, aeromagnetic survey in May 1984; the contractor was Austirex International Ltd. The survey was designed to define iron rich horizons, and, in particular isolated pyrrhotite sources, in the South Alligator Group rocks as well as the immediately overlying Burrell Creek Formation. The magnetic ridge in the central western part of the block appears a SE trending extension of an aeromagnetic anomaly (AMG 84700N, 85900E)in former EL 3008, costeaned (with negative results) in 1986. The costean cut a shale-siltstone-greywacke sequence of Mt Bonnie Formation or Burrell Creek Formation affiliation. Rock Chip Geochemistry/Geological Mapping - Reconnaissance rock chip sampling of ferruginous lithologies, particularly in magnetically anomalous areas, was undertaken using 1:25,000 scale commonwealth colour air photographs for control. Samples were analysed by Australian Assay Laboratories (AAL) at Pine Creek for gold (fire assay), arsenic, silver, copper, lead and zinc (AAS). No rock chip samples were collected in that part of Block 1752 not retained under mineral claim applications. Thematic Mapping - H Davies of Remote Sensing and Geological Services carried out a Thematic Mapper (TM) survey over Block 1752 in the course of a study of the Moline area in late 1988. TM uses high resolution satellite imagery to map major rock units in a region and to delineate subordinate members (eg ferruginous lithologies) within these. As a consequence structural features not mappable at ground level can be recorded and ferruginous units targetted for sampling. Subsequent to the Thematic Mapping, no rock chip samples were collected from that part of Block 1752 not retained under mineral claim applications.