Constraints on continental crustal thickness and density structure

<div><strong>Output Type: </strong>Exploring for the Future Extended Abstract</div><div><br></div><div><strong>Short Abstract: </strong>The continental crust directly hosts or underlies almost all mineral resources on which society depends. Despite its obvious importance its structure is poorly characterised. In particular, its density is surprisingly poorly constrained because it is difficult to directly image from the surface. Here we collate a global database of crustal thickness and velocity constraints. In combination with a compilation of published laboratory experimental constraints on seismic velocity at a range of pressures, we develop a scheme with which to convert seismic velocities into density as a function of pressure and temperature. We apply this approach to the Australian crystalline basement. We find that the Australian crust is highly heterogeneous, ranging in bulk density from 2.7—3.0 g cm-3. Finally, we explore the utility of our database for testing hypotheses about the location and endowment of mineral resources using porphyry copper deposits as an example. Our results provide an improved framework with which to explore the subsidence and thermal evolution of sedimentary basins, as well as probing relationships between deposit types and crustal architecture.</div><div><br></div><div><strong>Citation: </strong>Stephenson, S.N., Hoggard, M.J., Haynes, M.W., Czarnota, K. & Hejrani, B., 2024. Constraints on continental crustal thickness and density structure. In: Czarnota, K. (ed.) Exploring for the Future: Extended Abstracts, Geoscience Australia, Canberra, https://doi.org/10.26186/149336</div>

Simple

Identification info

Date (Creation)
2024-03-18T16:00:00
Date (Publication)
2024-08-12T05:57:40
Citation identifier
Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/149336

Citation identifier
Digital Object Identifier/https://dx.doi.org/10.26186/149336

Cited responsible party
Role Organisation / Individual Name Details
Publisher

Commonwealth of Australia (Geoscience Australia)

 Voice
Author

Stephenson, S.N.

 External Contact
Author

Hoggard, M.J.

 External Contact
Author

Haynes, M.

 Internal Contact
Author

Czarnota, K.

 Internal Contact
Author

Hejrani, B.

 Internal Contact
Editor

Czarnota, K.

 Internal Contact
Purpose

An extended abstract highlighting the key activities and outcomes of the Crustal Architecture and Metallogenesis collaborative project between Geoscience Australia and the University of Oxford, under the Exploring for the Future Program.

Status
Completed
Point of contact
Role Organisation / Individual Name Details
Resource provider

Minerals, Energy and Groundwater Division

 External Contact
Point of contact

Commonwealth of Australia (Geoscience Australia)

 Voice
Point of contact

Haynes, M.

 Internal Contact
Spatial representation type
Topic category
  • Geoscientific information

Extent

N
S
E
W


Maintenance and update frequency
Not planned

Resource format

Title

Product data repository: Various Formats

Website

Data Store directory containing the digital product files

Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes

Project

  • EFTF – Exploring for the Future

Project

  • Australia’s Resources Framework

Project

  • Lithospheric Geophysics

Keywords

  • Crustal Structure

Keywords

  • crustal architecture

Keywords

  • crustal thickness

Keywords

  • seismic velocity

Keywords

  • Receiver functions

Keywords

  • seismic refraction

Keywords

  • H-k stacking

Keywords

  • Copper porphyry

theme.ANZRC Fields of Research.rdf

  • Geology

  • Geophysics

  • Resource geoscience

Keywords

  • Published_External

Resource constraints

Title

Creative Commons Attribution 4.0 International Licence

Alternate title

CC-BY

Edition

4.0

Website

https://creativecommons.org/licenses/by/4.0/

Addressee
Role Organisation / Individual Name Details
User

Any
Use constraints
License
Use constraints
Other restrictions
Other constraints

© Commonwealth of Australia (Geoscience Australia) & University of Oxford 2024

Resource constraints

Title

Australian Government Security Classification System

Edition date
2018-11-01T00:00:00
Website

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

Classification
Unclassified
Classification system

Australian Government Security Classification System

Associated resource

Association Type
Had derivation
Title

Continental Residual Topography Extracted from Global Analysis of Crustal Structure

Citation identifier
148960

Citation identifier
9c3c5b5c-aea3-43c9-b27b-711e7d7bc1d6

Website

http://pid.geoscience.gov.au/dataset/ga/148960

Link to eCat metadata record landing page

Language
English
Character encoding
UTF8

Distribution Information

Distributor contact
Role Organisation / Individual Name Details
Distributor

Commonwealth of Australia (Geoscience Australia)

 Voice facsimile
OnLine resource

Extended Abstract for download (pdf) [1.7 MB]

Extended Abstract for download (pdf) [1.7 MB]

Distribution format

  • pdf

    File decompression technique

    nil

OnLine resource

Download supplementary data file (pdf) [413 KB]

Download supplementary data file (pdf) [413 KB]

Distribution format

  • zip

    File decompression technique

    unzip

Resource lineage

Statement

<div>A global database of crustal thickness and seismic velocity estimates has been compiled from previously published H-kappa stacking, receiver function, seismic refraction, and seismic wide angle studies. New constraints on crustal architecture have been incorporated based on data from the AusArray passive seismic deployment across Australia. Analysis of the data has lead to the development of new empirical relationships between bulk crustal velocity and density structure. These relationships are applied to the global database and to new ambient noise tomographic models produced using AusArray data, to estimate Australian crustal density.</div>

Metadata constraints

Title

Australian Government Security Classification System

Edition date
2018-11-01T00:00:00
Website

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

Classification
Unclassified

Metadata

Metadata identifier
urn:uuid/8dcccae5-e849-4d2e-8b32-9ddbfab30b34

Title

GeoNetwork UUID

Language
English
Character encoding
UTF8
Contact
Role Organisation / Individual Name Details
Point of contact

Commonwealth of Australia (Geoscience Australia)

 Voice
Point of contact

Haynes, M.

 Internal Contact

Type of resource

Resource scope
Document
Name

GA Abstract / Fact Sheet

Alternative metadata reference

Title

Geoscience Australia - short identifier for metadata record with

uuid

Citation identifier
eCatId/149336

Metadata linkage

https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/8dcccae5-e849-4d2e-8b32-9ddbfab30b34

Metadata linkage

https://ecat.ga.gov.au/geonetwork/dashboard/eng/catalog.search#/metadata/8dcccae5-e849-4d2e-8b32-9ddbfab30b34

Date info (Creation)
2024-08-09T02:08:08
Date info (Revision)
2024-08-09T02:08:08

Metadata standard

Title

AU/NZS ISO 19115-1:2014

Metadata standard

Title

ISO 19115-1:2014

Metadata standard

Title

ISO 19115-3

Title

Geoscience Australia Community Metadata Profile of ISO 19115-1:2014

Edition

Version 2.0, September 2018

Citation identifier
http://pid.geoscience.gov.au/dataset/ga/122551

 
 

Spatial extent

N
S
E
W


Keywords

Australia’s Resources Framework EFTF – Exploring for the Future Lithospheric Geophysics
theme.ANZRC Fields of Research.rdf
Geology Geophysics Resource geoscience

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