Geoscience Data Integration: Insights into Mapping Lithospheric Architecture

Graham C Begg; William L Griffin; Suzanne Y O’Reilly; Lev Natapov

doi:10.1071/ASEG2015ab127

24th International Geophysical Conference and Exhibition – Geophysics and Geology Together for Discovery

ISSN: 2202-0586
E-ISSN:

oa Geoscience Data Integration: Insights into Mapping Lithospheric Architecture
Authors Graham C Begg^a, William L Griffin^b, Suzanne Y O’Reilly^c and Lev Natapov^d
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^a Minerals Targeting International PL, Suite 26, 17 Prowse St., West Perth, , WA, 6005, Australia, [email protected] ^b ARC Centre of Excellence for Core to Crust Fluid Systems/GEMOC, Macquarie University, , NSW, 2109, , Australia, [email protected] ^c ARC Centre of Excellence for Core to Crust Fluid Systems/GEMOC, Macquarie University, , NSW, 2109, , Australia, [email protected] ^d ARC Centre of Excellence for Core to Crust Fluid Systems/GEMOC, Macquarie University, , NSW, 2109, , Australia, [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2015, Issue 24th International Geophysical Conference and Exhibition – Geophysics and Geology Together for Discovery, Dec 2015, p. 1 - 2
DOI: https://doi.org/10.1071/ASEG2015ab127
- Published online: 01 Dec 2015

Abstract

In order to develop a 4D understanding of the architecture of the entire lithosphere, it is necessary to embrace integration of multi-disciplinary, multi-scale data in a GIS environment. An holistic understanding has evolved whereby geologic, geochemical and geophysical signals are consistent with a subcontinental lithospheric mantle (SCLM) dominated by a mosaic of domains of Archean ancestry, variably overprinted by subsequent tectonothermal events. Pristine Archean SCLM is mostly highly depleted (high Mg#), low density, high velocity and highly resistive, and preserves intact Archean crust. There is a first order relationship between changes to these signals and the degree of tectonothermal overprint (by melts, fluids). Continental crust is comprised largely of reconstituted Archean components, variably diluted by juvenile addition, symptomatic of the various overprinting events. These events impart crustal fabrics and patterns dictated by SCLM architecture, influenced by the free surface and crust-mantle decoupling.

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References

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/content/journals/10.1071/ASEG2015ab127

Article Type: Research Article

Keyword(s): Geoscience Data Integration; Lithosphere architecture; subcontinental lithospheric mantle

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