Eucla — Gawler deep crustal seismic reflection and MT surveys

Eucla-Gawler deep crustal seismic reflection and MT surveys

Eucla-Gawler deep crustal seismic reflection and MT surveys Processed images for the Eucla–Gawler deep crustal seismic reflection line, which is part of a collaboration between Geoscience Australia (GA), the Geological Survey of Western Australia (GSWA), the Geological Survey of South Australia (GSSA) and AuScope Earth Imaging (part of the National Collaborative Research Infrastructure Strategy) will be released on 22 June 2016. This 870-kilometre survey along the Trans-Australian Railway was conducted across the Nullarbor region during 2013 and 2014. The Eucla–Gawler region is a major geological frontier, buried by extensive sedimentary cover associated with the Eucla Basin (Nullarbor Plain). The region lies between two of the most prospective geological regions in the world, Western Australia’s Yilgarn Craton to the west, and the Gawler Craton in South Australia to the east.

The migrated uninterpreted seismic sections are available for download (in multiple formats) directly from GA.

TIFF images will also be available from the GSWA website.

Interpretations of seismic line EG1 will be presented at a series of talks at the upcoming Australian Earth Sciences Convention in Adelaide on Thursday 30 June 2016 at a dedicated session under the Mineral Endowment theme ‘Exposing the Nullarbor basement’.

For details, see the Convention program.

GSWA free database training — 2016

The Geological Survey of Western Australia (GSWA) offers FREE training in its databases and online systems. The training is in the form of a presentation, with hands-on interaction in most systems.
Topics include:

A desktop computer will be available for each participant.


Perth sessions — 2016

WA map The Perth training has been divided into separate sessions: one for prospectors, and one for mining companies/geologists.

Venue: No. 1 Adelaide Terrace, East Perth

Thursday 27 October

Prospectors — morning
9.30–9.45 Welcome and web systems
9.45–10.45 GeoVIEW.WA
10.45–11.00 Tea break
11.00–12.00 GeoMap.WA
12.00–12.30 Questions and activities

Mining companies/geologists — afternoon

1.30–1.45 Welcome and web systems
1.45–2.45 GeoVIEW.WA
2.45–3.00 Tea break
3.00–3.45 WAMEX/drillholes/geochemistry
3.45–4.30 Questions and activities

Please confirm attendance and advise which sessions you wish to attend. If you find that you cannot attend for any reason, please let us know with some notice so we can let someone on the waiting list fill your place.


Kalgoorlie sessions — 2016
The Kalgoorlie training is open to all.
Venue: 34 Cheetham Street, Kalgoorlie, central campus for the Goldfields Institute of Technology, Kalgoorlie

Date in November to be advised

Morning

9.30–10.00 Welcome and web systems
10.00–11.00 GeoVIEW.WA
11.00–11.15 Tea break
11.15–11.45 WAMEX (minerals exploration report database)
11.45–12.15 Mineral drillholes and geochemistry databases
12.15–1.00 Lunch break

Afternoon

1.00–1.45 GeoMap.WA
1.45–3.00 Individual sessions — specific examples, queries and issues relating to GSWA Web Systems and applications covered in the training session.

Company-specific training on site

GSWA also provides tailored database training at company premises. The sessions can cover all the topics covered in the sessions mentioned above. Please contact Cindi Dunjey on 9222 3168 or cindi.dunjey@dmp.wa.gov.au for more information.

Sign up now for FREE training!

See our website for more details. To register, send an email to publications@dmp.wa.gov.au including your details (name, company name and telephone), with the location and date of the training you wish to attend.

Spotlight on a product

Report 155 Unravelling the upper-Amphibolite facies Glenburgh gold deposit, Gascoyne Province — evidence for metamorphosed mineralization

by LK Roche

Spotlight on a product This Report is the culmination of work conducted as part of the Geological Master’s Program through the Geological Survey of Western Australia (GSWA). Gold deposits are rare in upper-amphibolite to granulite facies environments. Known examples commonly attract debate about whether they formed at these high temperatures, or instead represent metamorphosed, metasomatic or superimposed (retrograde) mineralization. The one-million ounce Glenburgh gold deposit formed in the Paleoproterozoic, upper-amphibolite to granulite facies Glenburgh Terrane in the southern Gascoyne Province of Western Australia.

Evidence from field mapping, visual and hyperspectral logging of drill samples, thin-section petrography, gold-microstructure analysis and zircon U–Pb geochronology of the Zone 126 and Icon lodes at the Glenburgh deposit demonstrates that this is a metamorphosed gold deposit. Features within the internal structure of gold grains, such as high-purity gold veinlets, incoherent twinning and low silver content, suggest the gold has been through postdepositional processes such as metamorphism and deformation. The presence of rounded sulfide inclusions within almandine, a peak metamorphic mineral, illustrates there was a sulfide phase present prior to the peak of metamorphism. The lack of a definitive alteration assemblage further suggests that the alteration assemblage and mineralization were recrystallized and perhaps remobilized during deformation and metamorphism. Geochronology data based on U–Pb indicates that mineralization must have formed later than c. 2035 Ma — the maximum depositional age of the metasedimentary host rocks — and prior to c. 1991 Ma — the peak of metamorphism during the Glenburgh Orogeny.

For more information, contact Lisa Roche.

REPORTS
Report 155 Unravelling the upper-amphibolite facies Glenburgh gold deposit, Gascoyne Province — evidence for metamorphosed mineralization
by Roche, LK

RECORDS
Record 2015/15 Record 2015/15 Regolith chemistry of the Bunuba and Yuriangem–Taam, south Kimberley
(includes plate)
by Scheib, AJ, Morris, PA and de Souza Kovacs, N

Record 2016/4 Geology and U–Pb geochronology of the Warlawurru Supersuite and MacDougall Formation in the Mitika–Wanarn areas, west Musgrave Province
by Quentin de Gromard, R, Wingate, MTD, Howard, HM and Smithies, RH

Record 2016/5 Microstructural evolution of the Yalgoo Dome (Western Australia)
by Schiller, M

Record 2016/6 A field guide to the mafic–ultramafic layered intrusions of the northern Youanmi Terrane
by Ivanic, TJ

Record 2016/7 Hydrogeochemistry of Western Australia, data release: accompanying notes
by Bardwell, N and Gray, DJ

Record 2016/9 Improved Hydrogeochemical Exploration in the northwest Yilgarn
This Record also includes zipped data files.
by Gray, DJ, Reid, N, Noble and Ryan RP

NON-SERIES BOOKS
Fieldnotes: a Geological Survey of Western Australian newsletter April 2016 number 78            

1:100 000 GEOLOGICAL SERIES MAPS
Ilgarari, WA sheet 2849                                      
Blay, OA and Thorne, AM

Lofty Range, WA sheet 2749
Blay, OA and Thorne, AM

NON-SERIES MAPS
Iron ore deposits of the Yilgarn Craton, 2016
by Cooper, RW

PLATES
Four plates have been updated to accompany Record 2014/6 Albany–Fraser Orogen seismic and magnetotelluric (MT) workshop 2014: extended abstracts
by Spaggiari, CV and Occhipinti, SA

Plate 1 Interpreted pre-Mesozoic bedrock geology of the Albany–Fraser Orogen and southeast Yilgarn Craton including seismic line 12GA-T1
by Spaggiari, CV and Occhipinti, SA

Plate 2 Interpreted pre-Mesozoic bedrock geology of the Albany–Fraser Orogen and southeast Yilgarn Craton including seismic line 12GA-AF3
by Spaggiari, CV and Brisbout, L

Plate 3 Interpreted pre-Mesozoic bedrock geology of the Albany–Fraser Orogen and southeast Yilgarn Craton including seismic lines 12GA-AF1 and 12GA-AF2
by Spaggiari, CV and Brisbout, L

Plate 4 Geological interpretation of the Albany–Fraser Orogen and southeast Yilgarn Craton seismic lines 12GA-AF1, 12GA-AF2, 12GA-AF3, 12GA-T1
by Spaggiari, CV and Occhipinti, SA

DATA PACKAGE
Sea to scarp Sea to scarp — geology for land use planning in the northern Swan Coastal Plain, Lancelin to Geraldton $55

Pricing and availability
Maps, USB data packages, and selected premium publications are available to purchase as hard copies via the online cart on the eBookshop. Alternatively, these products can be purchased from the Information Centre, First Floor, Mineral House, 100 Plain Street, East Perth WA 6004, Australia, Phone: +61 8 9222 3459; Fax: +61 8 9222 3444.

Records, Reports, Bulletins and non-series books cannot be purchased in hard copy but are all available as PDFs to view, and as a free download.

If products do not have a URL link, they have just been released and will be available online soon.

DISCLAIMER
Products were produced using information from various sources. The Department of Mines and Petroleum (DMP) and the State cannot guarantee the accuracy, currency or completeness of the information. DMP and the State accept no responsibility and disclaim all liability for any loss, damage or costs incurred as a result of any use of or reliance whether wholly or in part upon the information provided in this publication or incorporated into it by reference.

Subscribe to Fieldnotes

Subscribe to Fieldnotes Fieldnotes is a quarterly publication released by GSWA to provide the State's exploration industry and other geoscientists with an update on our latest work and ongoing programs. The publication provides updates on other GSWA products and services and is available free from the Information Centre located on the first floor of Mineral House, 100 Plain Street, East Perth 6004. Find past issues of Fieldnotes here or subscribe to receive a hard copy by emailing publications@dmp.wa.gov.au.

Access GSWA products

You can view and download maps, reports, and digital information free of charge from our website.
Click on these links to take you to the download or launch page for that product:

Hard copies
Maps, USB data packages, and nine premium publications are available to purchase as hard copies from the eBookshop or the First Floor counter at Mineral House, 100 Plain Street, East Perth WA 6004. A new online cart and payment system is in place. Records, Reports, Bulletins and other non-series books cannot be purchased in hard copy but are all available as PDFs to view and download free of charge.

Contact us

Contact us

For information on publications, email publications@dmp.wa.gov.au
or telephone +61 8 9222 3459/ fax +61 8 9222 3444.

For information on digital data, email the Digital Data Administrator on gsd.dda@dmp.wa.gov.au or telephone +61 8 9222 3816.

Physical address
Mineral House
100 Plain Street
East Perth WA 6004
www.dmp.wa.gov.au/gswa
For more information about GSWA and its products, go to our website.