3D density and susceptibility distribution of the Wilkes Subglacial Basin and Transantarctic Mountains in East Antarctica.

We present a 3D crustal model of density and susceptibility distribution in the Wilkes Subglacial Basin and the Transantarctic Mountains (TAM) based on joint inversion of airborne gravity and magnetic data. The applied ''variation of information'' technique enforces a coupling between gravity and magnetic sources to give an enhanced inversion result. Our model reveals a large-scale body located in the interior of the Wilkes Subglacial Basin interpreted as a batholithic intrusive structure, as well as a linear dense body at the margin of the Terre Adelie Craton. We provide six netCDF files, which include the input gravity and magnetic data, the inverted gravity and magnetic data, and inverted crustal density and susceptibility distribution. Additionally, a simple jupyter notebook that loads and plots the provided data can be found here: https://doi.org/10.5281/zenodo.8304170

Funding for this research was provided by NERC through a SENSE CDT studentship (NE/T00939X/1)

Alternate title: Polar Data Centre (PDC) record GB/NERC/BAS/PDC/01765

Date (Publication): 2023-09-04

Citation identifier: http://www.antarctica.ac.uk/dms/metadata.php?id= / GB/NERC/BAS/PDC/01765

Point of contact

Organisation name	Individual name	Electronic mail address	Role
British Antarctic Survey		pdc@bas.ac.uk	Custodian
NERC EDS UK Polar Data Centre	Lowe, M., Jordan, T., Moorkamp, M., Ebbing, J., Green, C., Losing, M., & Larter, R.	pdc@bas.ac.uk	Originator

Maintenance and update frequency: Unknown

Keywords

NDGO0001

NERC OAI Harvesting

NERC_DDC

GCMD Parameter Valids

EARTH SCIENCE > Solid Earth > Geodetics/Gravity
EARTH SCIENCE > Solid Earth > Geomagnetism > Magnetic Intensity

BAS Free-text keywords

Density and susceptibility distribution
Gravity and magnetics
Joint inversion
Transantarctic Mountains
Wilks Subglacial Basin

Use limitation: This data is covered by a UK Open Government Licence ( http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/)

Access constraints: Other restrictions

Other constraints: This data is covered by a UK Open Government Licence ( http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/)

Distance: 7.5 km

Language: English

Topic category

Geoscientific information

Begin date: unknown

End date: unknown

Reference system identifier: OGP / urn:ogc:def:crs:EPSG::4326

Distribution format

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
Polar Data Centre - British Antarctic Survey		pdc@bas.ac.uk	Distributor

OnLine resource

Protocol	Linkage	Name
http		GET DATA

Hierarchy level: Dataset

Domain consistency

Measure identification: INSPIRE / Conformity_001

Conformance result

Title: INSPIRE Data Specification on unknown theme Guidelines

Date

Explanation: See the referenced specification

Pass: No

Statement: The RMS error between observed and inverted gravity field is 1.5 mGal and 0.7 nT for the magnetic field. The end members of the residual between observed and inverted values are + 37 and -18 mGal with a standard deviation of 3 mGal for the gravity inversion and for the magnetic inversion +341 and -65 nT with a standard deviation of 13 nT.