Updated: 04 May 2007

Minerals Alert May 2007

1. New Gravity Survey Data added to the Australian National Gravity Database
2. CALL FOR SUBSCRIBERS - Geoscience Australia 2007 - Airborne EM Survey Program - Pine Creek NT
3. Update on geophysical survey data acquisition
4. About Email Alert

1. New Gravity Survey Data added to the Australian National Gravity Database

New gravity data from surveys in Queensland, Western Australia and South Australia have recently (April 2007) been incorporated into the Australian National Gravity Database.

Data from the gravity survey in the Mt Isa Area C have been added into the Australian National Gravity Database. A total of 9,047 stations were acquired at a station spacing of 2.0 km x 2.0 km on the Duchess and Urandangi (eastern half) 1:250 000 sheet areas and at 4.0 km x 4.0 km spacing on the Urandangi (western half), Glenormiston and Mt Whelan 1:250 000 sheet areas. This survey was funded by the Geological Survey of Queensland under its Smart Exploration Initiative and project managed by Geoscience Australia.

The Murchison gravity survey covering parts of the Belele, Cue, Glengarry and Sandstone 1:250 000 sheet areas in Western Australia has now been completed. The release of final data for the 3,555 new stations is anticipated to be mid to late May 2007. The survey was funded by the Geological Survey of Western Australia and project managed by Geoscience Australia.

The Department of Primary Industries and Resources, South Australia has provided Geoscience Australia with company data that are now open file. Approximately 16,000 stations have now been added to the Australian National Gravity Database.

All data in the Australian National Gravity Database can be obtained free-of-charge using the Geophysical Archive Data Delivery System "GADDS".

For more information please email Mario Bacchin at Geoscience Australia, or phone on +61 (0)2 6249 99308.

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2. CALL FOR SUBSCRIBERS - Geoscience Australia 2007 Airborne EM Survey Program - Pine Creek NT

Geoscience Australia is implementing a program of airborne geophysical mapping over the Pine Creek region of the Northern Territory under the Australian Government's Onshore Energy Security Initiative funding package.

The objective of the survey is to improve the understanding of the geology and mineral potential of the survey area.

The data will be publicly available on completion of the survey.

Mineral exploration companies with interests in these areas are invited to participate in the project by contributing towards the additional costs of surveying. Contributions can be towards extending the current survey area and/or in-fill flying of the current survey area in locations of particular exploration interest.

Location map of proposed AEM survey of Pine Creek region of the NT

The extent of any additional coverage on adjoining sheets and the areas of in-fill flying will depend on client interest. Subscribers will be informed of the cost of their data requirements before any additional work is commenced.

Data acquired under company subscription will be subject to a moratorium to the subscribing companies prior to public release. The period of moratorium will be agreed between Geoscience Australia and the successful subscriber prior to the commencement of any additional work.

From the subscriptions received Geoscience Australia will select areas for in-fill/extension flying of the current survey area that complement the objective of the survey.

Expressions of interest should be submitted by Friday 25th May 2007 and should include a map of the desired infill/extension area and survey specifications.

Enquiries and expressions of interest (free of obligation) should be directed to Murray Richardson or Alan Whitaker Onshore Energy & Minerals Division Continental Geophysics Project or phone on +61 (02) 6249 9229 or +61 (02) 6249 9702

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3. Update on geophysical survey data acquisition

The status of current surveys is:

Location	State	Survey	% Complete	Gravity Stations	Flight Lines	Spacing	Ground Clearance	Comments
Ashburton	WA	Airborne magnetic & radiometric	100%	N/A	north-south	400 m	60 m	Completed 27 December 2006. Data were released on 4 April 2007 via GADDS.
Murchison	WA	Gravity	100%	3600 new	east-west over an area of 22 000 km²	2.5 km	N/A	Completed 17 March 2007. Preliminary data from the survey has been supplied to GA for assessment.
South Kimberly	WA	Airborne magnetic & radiometric	N/A	N/A	north-south over an area of 57 920 km	400 m	60 m	Data acquisition will commence in July 2007. The survey will cover parts of the Lennard River, Lansdowne, Noonkanbah, Mount Ramsay, Mount Bannerman 1:250 000 Map Sheets.
Western Tanami	WA	Gravity	N/A	3700 new	east-west traverses	2.5 km	N/A	The survey will cover all or portions of the Gordon Downs, Billiluna and Lucas standard 1:250 000 Map Sheets.
Isa South-East	Qld	Airborne magnetic & radiometric	100%	N/A	east-west	400 m	80 m	Data from this survey were released via GADDS on 4 April 2007.
East Isa North	Qld	Airborne Magnetic & Radiometric	20%	N/A	east-west 113 000 line km	400 m	80 m	Data acquisition commenced on 3 April 2007. The survey covers parts of Richmond, Hughenden, McKinlay, Manuka and Tangorin 1:250 000
East Isa South	Qld	Airborne Magnetic & Radiometric	54%	N/A	east-west 145 900 line km	400 m	80 m	The survey covers parts of the McKinlay, Manuka, Mackunda, Winton, Brighton Downs and Maneroo 1:250 000 map sheets, with data acquisition expected to commence at the end of flying on the Isa South-East airborne survey.
Mount Isa Area C	Qld	Gravity	100%	68 000 km² ~9 236 in total	N/A	C1 2.0 km grid C2 4.0 km grid	N/A	Data from this survey were released via GADDS on 11 April 2007.
Isa Area D	Qld	Gravity	N/A	4 903; 75 460 km²	N/A	4.0 km grid	N/A	Data acquisition will commence on completion of Isa Area E. The survey covers the entire Bedourie, Machattie, Birdsville and Betoota 1:250 000 Map Sheets and parts of the Connemara 1:250 000 Map Sheet.
Isa Area E	Qld	Gravity	90%	6 233	N/A	4.0 km grid	N/A	Data acquisition commenced on 1 February 2007. The survey will cover the entire McKinlay, Mackunda, Brighton Downs, Richmond and Manuka 1:250 000 Map Sheets and parts of the Winton and Maneroo 1:250 000 Map Sheet
Croydon	Qld	Airborne & Radiometric	N/A	35 310 km² 100 000 line km	east-west	400 m	80 m	Data acquisition expected to commence in May 2007. The survey covers parts of the Burketown, Normanton, Donors Hill, Croydon and Millungera 1:250 000 Map Sheets. When complete, the survey will have collected approx 100 000 line kilometres of new data.
Charters Towers	Qld	Gravity	N/A	15 310 new stations	east-west	4.0 km grid	N/A	The survey covers all or portions of the Einasleigh, Ingham, Clarke River, Townsville, Hughenden, Charters Towers, Bowen, Tangorin, Buchanan and Mount Coolon standard 1:250 000 Map Sheet areas.
Cooper Basin North	Qld	Gravity	N/A	3 537	east-west	4.0 km grid	N/A	The survey covers all or portions of the Maneroo, Longreach, Cannemara, Jundah and Blackall standard 1:250 000 Map Sheet areas.
Tanumbirini	NT	Airborne magnetic & radiometric	N/A	N/A	47 251 line km east-west 16 468 km²	400 m	80 m	Data acquisition is expected to commence in early July 2007. The survey covers parts of the Tanumbirini and Hodgson Downs 1: 250 000 Map Sheets.
North-East Tasmania	Tas	Airborne magnetic & radiometric	44%	N/A	east-west	200 m	90 m	Data acquisition commenced on 18 March 2007 by fixed-wing aircraft. The survey covers Tasmanian land mass over part of the following standard 1:100 000 map sheets - Ninth Island, Cape Portland, Swan Island, St Patricks, Forester, Georges Bay, St Pauls and Break O'Day.
Flinders Island	Tas	Airborne magnetic & radiometric	100%	N/A	east-west	200 m	90 m	Preliminary gridded data was supplied to Geoscience Australia for assessment on 20 April 2007.
Australia-wide	N/A	Airborne Geophysical tie-line	15%	145 000 line km	north-south	75 km	80 m	Data acquisition commenced 29 March 2007.
Canning Basin 2007	N/A	Airborne magnetic & radiometric	7%	Area 70 192 km²line km 100 000	north-south	800 m	80 m	Data acquisition commenced on 22 April 2007. The survey covers parts of the Anketell, Joanna Spring, Dummer, Paterson Range, Sahara, Tabletop and Ural 1:250 000 Map Sheets.

Geoscience Australia will be managing the data acquisition program in Queensland, Northern Territory and Tasmania.

For further information, please email Murray Richardson, or phone +61 (0)2 6249 9229.

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4. About Email Alert

For more information, please email Mike Huleatt, or phone +61 (0)2 6249 9087.

To view past editions of Geoscience Australia's Minerals Alert, visit the Minerals Alert Newsletter Archive.

To unsubscribe visit the online subscription page and follow the instructions.

For more information contact: Mike Huleatt

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