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Title: EL 33208 Hermit Hill Project Final Surrender Report for the period 16 December 2022 to 19 August 2024
Title Holder / Company: West Cobar Metals
Report id: CR2024-0535
Tenure: EL33208
Year: 2024
Author: Pascoe, D
Abstract: West Cobar Metals Limited (West Cobar) Hermit Hill Project is located approximately 140km SSW of Darwin and 30km West of the Daly River settlement in the Northern Territory. It consists of a single exploration license EL 33208, which covers an area of approximately 664.4km2. The project area is accessed by a good quality gravel road, (Port Keats Road) from Daly River and numerous station tracks and fence lines suitable for a four-wheel drive vehicle. The Litchfield Province is defined as the western part of the Pine Creek Geosyncline, with large parts of the Litchfield Province interpreted as 'granitoid, garnetiferous, gneissic, with metasediments varying in metamorphic grade from greenschist to upper amphibolite / granulite grade' (Berkman 1980). The lack of outcrop in much of the area has limited exploration. The mapped lithology within EL 33208 is largely obscured by Cainozoic eluvial soils. Floodplain alluvium masks the geology of the northern blocks. The regional 1:500k interpretation map from the NTGS shows much of the tenement underlain by the Allia Suite Granites (Litchfield and Murra-Kumangee Granodiorite) with areas of Hermit Creek Metamorphics sandwiched between the granites and with an isolated intrusion of Wangi Basics in the south. The Wangi Basics intrusive contains anomalous Cu and Ni along the southeastern margin of the tenement. The Allia Suite is approximately 1840 Ma in age and is a S-type, containing minerals such as andalusite, cordierite and muscovite. Abundant pegmatites which occur within the granite and into the surrounding country rock are characteristics of the suite. Some Sn, Ta, with minor Au and W mineralisation are spatially associated with Allia Suite particularly the Two Sisters and Soldiers Creek granites. The Allia suite is highly fractioning, reduced, and peraluminous that has high potential for further discoveries of Sn (and Li) due to the associated number of latestage pegmatites and hydrothermal alteration. (Wyborn 2002) A review of public and open file data, particularly for LCT pegmatites, has identified gold, base metals and Li/Sn targets. Neil Pendock of Dirt Exploration was engaged by West Cobar to identify potential Lithium targets utilising Sentinal-2 satellite remote sensing data. From this data provided Neil identified 30 targets. Results of the Sentinal-2 targeting were generally disappointing with no obvious targets for further exploration identified. This is mainly thought to be because of the nature of the landscape of black soils plains with standing water emitting gases that appear to be from a Li mineral decay sequence. Two field trips were completed by West Cobar Metals or consultants and resulted in the collection of 33 rock chip samples, with all samples were submitted for Li suite with selected samples for gold and base metals. Pegmatites in the Hermit hill area appear to extend north and south on a NW-SE trend and can be traced for 300-400m along strike. No obvious Li bearing minerals were identified. Reconnaissance was carried out over the Sandy Creek Complex area of base metals and PGE anomalies identified in historic soils. Apart from the contact zones with chloritic shears the bulk of the Complex within EL 33208 consisted of fresh relatively massive metabasites. One thin discontinuous quartz vein with gossanous material was sampled by West Cobar and contained 2g/t gold. CSA Global were engaged to provide a desktop review of the results of the initial field trip and to provide recommendations and potential exploration targets for further work. Overall while CSA Global is of the opinion that EL 33208, based on the data and local geology, has low prospectivity for LCT pegmatites, it has identified several targets that WC1 may wish to follow up. These include: re-sampling the Hermit Hill pegmatites to obtain good quality K/Rb fractionation data; re-sampling or re-drilling the pegmatites intersected in previous drilling; and bedrock geochemical sampling within the target areas indicated. Follow up sampling failed to find significant anomalies and the licence was relinquished.
Date Added: 30-Jun-2025
Appears in Collections:Minerals Exploration Reports (MEX)

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