Goverment Geophysics News, Regular Columns, Vol 25.3

Government Geophysics News

Happy fall, in Alaska anyway. The Geological Survey of Canada and Alaska Division of Geological & Geophysical Surveys (DGGS) released new data. Australia has significantly expanded their Exploring for the Future program. For those of us working at government institutions we often have a wealth of base data at our disposal on our internal servers. The good news is much of the data are  accessible to the public if you know where  to look. I will share some insider tips of how to get the best geoscience data from DGGS, I hope to get similar information from other surveys on often overlooked data resources.

Please send me your contributions on data and report releases and either planned, upcoming, in progress or recently completed geophysical projects or research. I can be contacted at abraham.emond@alaska.gov, +1-907 451 3098 (office) or

+1-801-839-4127 (cell).
Abraham

Geological Survey of Canada

Contact: Doug Oneschuk Geophysicist
Airborne Geophysics Section Geological Survey of Canada 601 Booth Street, Ottawa, Ontario, Canada K1A 0E9 Douglas.Oneschuk@Canada.ca
613-947-3337

The Geological Survey of Canada has recently released maps and data acquired during an aeromagnetic survey carried out from January 19, 2020 to March 28, 2020 in the Nash Creek area of the Yukon (Figure 1). The data were recorded using a split-beam cesium vapour magnetometer mounted in the tail boom of a Beechcraft King Air aircraft. The nominal traverse and control line spacings were, respectively, 400 m and 2400 m, and the aircraft flew at a nominal terrain clearance of 150 m. The flight path was recovered following post-flight differential corrections to the raw Global Positioning System (GPS). Maps of the residual total magnetic field and the first vertical derivative of the magnetic field were published.

This publication is available for free download through GEOSCAN (http://geoscan.nrcan.gc.ca). Corresponding digital profile and gridded data as well as similar data for adjacent airborne geophysical surveys are available from Natural Resources Canada’s Geoscience Data Repository for Aeromagnetic data at http://gdr.agg.nrcan.gc.ca. Copies of this map may also be obtained from the Yukon Geological Survey, Energy, Mines and Resources, Government of Yukon, P.O. Box 2703 (K-102), Whitehorse, Yukon, Y1A 2C6. Telephone: (867) 667-3201, email: geology@gov.yk.ca, website: http://www.geology.gov.yk.ca

Figure 1. Regional and National survey location maps

Alaska Division of Geological & Geophysical Surveys

DGGS released preliminary magnetic and radiometric data 12 days! after the completion of the their Shaw Creek and Shawnee Peak survey, https://doi.org/10.14509/30551. This fast turn around was to support our industry partners’ exploration programs. Looking for great base layer data try these Alaska statewide links,

https://geoportal.dggs.dnr.alaska.gov/arcgis/rest/services https://geoportal.dggs.dnr.alaska.gov/portal/home/

https://geoportal.dggs.dnr.alaska.gov/arcgis/services/elevation/ IFSAR_DTM/ImageServer http://www.asgdc.state.ak.us/

Don’t overlook municipalities either, Fairbanks North Star Borough has some excellent local data including LiDAR and 4 inch pixel size ortho photos.https://gisportal.fnsb.us/referenced/rest/services/publicDatahttps://gisportal.fnsb.us/image/rest/services

Geoscience Australia – Exploring for the Future Program

In June 2020, Australia announced a $125M AUD ($91M USD) four-year expansion of their Exploring for the Future (EFTF) Program, https://www.ga.gov.au/eftf. This builds on the $100M AUD ($73M USD) initially invested in 2016 and expands the program to all of Australia from the initial northern focus. This program is focused on groundwater, mineral resources, and energy. In August 2020 Geoscience Australia identified two priority corridors and outlined the southern focus of the expanded program as shown by the map created by Geoscience Australia. This is an impressive investment in geoscience that “is focused on boosting investment in the resources sector, generating jobs and maintaining a strong economy.”

-Geoscience Australia.

ACIL Allen Consulting published a positive economic assessment of the first four years of the program here: https:// www.acilallen.com.au/projects/program-evaluation/exploring-for-the- future-program-return-on-investment-analysis

Figure 2. The Exploring for the Future program will collect regional-scale geoscience data across southern Australia, and along two corridors with potential for new discoveries of groundwater, mineral and energy resources. Source: Geoscience Australia

The EFTF program has been highly successful, implementing innovative methods and integrating multi-disciplinary data from surveys that covered 2 million square kilometres. Nearly 200 new datasets and reports have been delivered through a new world-leading data delivery portal. The program has been extended for four years and will expand its reach nationally. The Exploring for the Future data portal (Figure 3) to download these datasets and report for is accessible at https://portal.ga.gov.au/persona/eftf. A demonstration video of the data portal features can be viewed at https://youtu.be/vtG5s-AdldY.

Registration for four webinars (on demand) that are introduc- ing the EFTF program can be accessed at:

https://event.on24. com/eventRegistration/EventLobbyServlet?target=reg20.jsp&referrer=https://wcc.on24.com/webcast/groupregistration/2340360&even tid=2340360&sessionid=1&key=9E0C5D3E593F944F92A33FB 269C1EBE3&regTag=1028134&sourcepage=register

Figure 3. Exploring for the Future data portal

EDITORS NOTE: Refer also to FastTIMES Vol 24, 5 pp 95-100 for more information on Geoscience Australia’s nation-wide data coverage (https://www.eegs.org/latest-issue).