Data

P201631 Stavely Gravity Traverses SCBA267GU 1VD

Geoscience Australia
Geophysical Acquisition & Processing Section
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://pid.geoscience.gov.au/dataset/ga/143875&rft.title=P201631 Stavely Gravity Traverses SCBA267GU 1VD&rft.identifier=https://pid.geoscience.gov.au/dataset/ga/143875&rft.description=Gravity data measure small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. This P201631 Stavely Gravity Traverses SCBA267GU 1VD is the first vertical derivative of the spheical cap Bouguer anomaly grid for the Stavely Gravity Traverses, 2016 (P201631). This gravity survey was acquired under the project No. 201631 for the geological survey of VIC. The grid has a cell size of 0.0005 degrees (approximately 50m). A total of 3564 gravity stations at 200m spacing were acquired to produce this grid. A Fast Fourier Transform (FFT) process was applied to the original grid to calculate the first vertical derivative grid. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.Maintenance and Update Frequency: notPlannedStatement: This P201631 Stavely Gravity Traverses SCBA267GU 1VD is the first vertical derivative of the spherical cap Bouguer anomaly grid for the Stavely Gravity Traverses, 2016 (P201631). This gravity survey was acquired under the project No. 201631 for the geological survey of VIC. The grid has a cell size of 0.0005 degrees (approximately 50m). A total of 3564 gravity stations at 200m spacing were acquired to produce this grid. Three processes are required to correct the gravity observations for the effects of the surrounding topography: (1) a Bouguer correction (Bullard A), which approximates the topography as an infinite horizontal slab; (2) a correction to that horizontal slab for the curvature of the Earth (Bullard B); and (3) a terrain correction (Bullard C), which accounts for the undulations of the surrounding topography. The Spherical Cap Bouguer gravity anomalies were calculated by applying Bullard A and Bullard B corrections to the free air anomalies using a density of 2670 kg per cubic metre. These data were then gridded using the nearest neighbour algorithm from the INTREPID Geophysics software package. A first vertical derivative was calculated by applying a fast Fourier transform (FFT) process to the Bouguer gravity grid of the Stavely Gravity Traverses, 2016 (P201631) to produce this grid. This grid was calculated using an algorithm from the INTREPID Geophysics software package. The processed data are checked by GA geophysicists using standard methods for assessing quality to ensure that the final data are fit-for-purpose. The final Spherical cap Bouguer anomalies grid contains data values which account for a correction due to the shape or curvature of the Earth, and provide a more accurate representation of crustal density variations beneath the Earth's surface. Details of the specifications of individual surveys held in the Australian National Gravity Database (ANGD) can be found in the Second Edition of the Index of Gravity Surveys (Wynne and Bacchin, 2009). References: Intrepid Geophysics, http://www.intrepid-geophysics.com; Wynne, P., and Bacchin, M., 2009. Index of Gravity Surveys (Second Edition). Geoscience Australia, Record 2009/07.&rft.creator=Geophysical Acquisition & Processing Section &rft.date=2020&rft.coverage=westlimit=141.349; southlimit=-37.9102; eastlimit=142.8402; northlimit=-35.9817; projection=GDA94 (EPSG:4283)&rft.coverage=westlimit=141.349; southlimit=-37.9102; eastlimit=142.8402; northlimit=-35.9817; projection=GDA94 (EPSG:4283)&rft_rights=&rft_rights=Creative Commons Attribution 4.0 International Licence&rft_rights=CC-BY&rft_rights=4.0&rft_rights=http://creativecommons.org/licenses/&rft_rights=(c) State of Victoria (Geological Survey of Victoria) 2020&rft_rights=Australian Government Security ClassificationSystem&rft_rights=https://www.protectivesecurity.gov.au/Pages/default.aspx&rft_rights=WWW:LINK-1.0-http--link&rft_rights=Creative Commons Attribution 4.0 International Licence http://creativecommons.org/licenses/by/4.0&rft_subject=geoscientificInformation&rft_subject=EARTH SCIENCES&rft_subject=NCI&rft_subject=Earth sciences&rft_subject=geophysics&rft_subject=grid&rft_subject=Australia&rft_subject=VIC&rft_subject=survey 201631&rft_subject=GADDS2.0&rft_subject=gravity&rft_subject=spherical cap&rft_subject=Bouguer&rft_subject=1VD&rft_subject=first vertical derivative&rft_subject=ground digital data&rft_subject=geophysical survey&rft_subject=grav&rft_subject=raster&rft_subject=Published_External&rft.type=dataset&rft.language=English Access the data
Cite Saved to MyRDA Save to MyRDA

Licence & Rights:

Open Licence view details
CC-BY

Creative Commons Attribution 4.0 International Licence
http://creativecommons.org/licenses/by/4.0

Creative Commons Attribution 4.0 International Licence

CC-BY

4.0

http://creativecommons.org/licenses/

(c) State of Victoria (Geological Survey of Victoria) 2020

Australian Government Security ClassificationSystem

https://www.protectivesecurity.gov.au/Pages/default.aspx

WWW:LINK-1.0-http--link

Access:

Open

Brief description

Gravity data measure small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. This P201631 Stavely Gravity Traverses SCBA267GU 1VD is the first vertical derivative of the spheical cap Bouguer anomaly grid for the Stavely Gravity Traverses, 2016 (P201631). This gravity survey was acquired under the project No. 201631 for the geological survey of VIC. The grid has a cell size of 0.0005 degrees (approximately 50m). A total of 3564 gravity stations at 200m spacing were acquired to produce this grid. A Fast Fourier Transform (FFT) process was applied to the original grid to calculate the first vertical derivative grid. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.

Lineage

Maintenance and Update Frequency: notPlanned
Statement: This P201631 Stavely Gravity Traverses SCBA267GU 1VD is the first vertical derivative of the spherical cap Bouguer anomaly grid for the Stavely Gravity Traverses, 2016 (P201631). This gravity survey was acquired under the project No. 201631 for the geological survey of VIC. The grid has a cell size of 0.0005 degrees (approximately 50m). A total of 3564 gravity stations at 200m spacing were acquired to produce this grid. Three processes are required to correct the gravity observations for the effects of the surrounding topography: (1) a Bouguer correction (Bullard A), which approximates the topography as an infinite horizontal slab; (2) a correction to that horizontal slab for the curvature of the Earth (Bullard B); and (3) a terrain correction (Bullard C), which accounts for the undulations of the surrounding topography. The Spherical Cap Bouguer gravity anomalies were calculated by applying Bullard A and Bullard B corrections to the free air anomalies using a density of 2670 kg per cubic metre. These data were then gridded using the nearest neighbour algorithm from the INTREPID Geophysics software package. A first vertical derivative was calculated by applying a fast Fourier transform (FFT) process to the Bouguer gravity grid of the Stavely Gravity Traverses, 2016 (P201631) to produce this grid. This grid was calculated using an algorithm from the INTREPID Geophysics software package. The processed data are checked by GA geophysicists using standard methods for assessing quality to ensure that the final data are fit-for-purpose. The final Spherical cap Bouguer anomalies grid contains data values which account for a correction due to the shape or curvature of the Earth, and provide a more accurate representation of crustal density variations beneath the Earth's surface. Details of the specifications of individual surveys held in the Australian National Gravity Database (ANGD) can be found in the Second Edition of the Index of Gravity Surveys (Wynne and Bacchin, 2009). References: Intrepid Geophysics, http://www.intrepid-geophysics.com; Wynne, P., and Bacchin, M., 2009. Index of Gravity Surveys (Second Edition). Geoscience Australia, Record 2009/07.

Created: 07 03 2020

Issued: 07 03 2020

Modified: 05 07 2021

Data time period: 05 12 2016 to 05 01 2017

This dataset is part of a larger collection

Click to explore relationships graph
Help

Related Organisations

Related People

Related Services

142.8402,-35.9817 142.8402,-37.9102 141.349,-37.9102 141.349,-35.9817 142.8402,-35.9817

142.0946,-36.94595

text: westlimit=141.349; southlimit=-37.9102; eastlimit=142.8402; northlimit=-35.9817; projection=GDA94 (EPSG:4283)

Subjects
1VD | Australia | Bouguer | EARTH SCIENCES | Earth sciences | GADDS2.0 | NCI | Published_External | VIC | first vertical derivative | geophysical survey | geophysics | geoscientificInformation | grav | gravity | grid | ground digital data | raster | spherical cap | survey 201631 |

User Contributed Tags    

Login to tag this record with meaningful keywords to make it easier to discover

Other Information
The Geophysical Archive Data Delivery System (GADDS2) portal provides HTTP download of geophysics datasets in a number of formats. Point and line datasets are available in NetCDF and ASEG-GDF2. Grid datasets are available in NetCDF, GeoTIFF and ERS. (File available for download in various formats from the GADDS2 portal)

uri : https://portal.ga.gov.au/persona/gadds

Identifiers
Similar data you may be interested in: