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A 3D gas hydrate model of the southern Hikurangi Margin

This dataset contains underlying data and results of 3D gas hydrate modelling at the southern Hikurangi Margin using PetroMod™ software and accompanies a manuscript published in the Geochemistry Geophysics Geosystems journal (DOI10.1029/2019GC008275). The model integrates thermal and microbial gas generation, migration and hydrate formation. Modelling these processes has improved the understanding of factors controlling hydrate distribution. Three spatial trends of concentrated hydrate occurrence are predicted. The first trend (I) is aligned with the principal deformation front in the overriding Australian plate. Concentrated hydrate deposits are predicted at or near the apexes of anticlines and to be mainly sourced from focussed migration and recycling of microbial gas generated beneath the hydrate stability zone. A second predicted trend (II) is related to deformation in the subducting Pacific plate associated with former Mesozoic subduction beneath Gondwana and the modern Pacific-Australian plate boundary. This trend is enhanced by increased advection of thermogenic gas through permeable layers in the subducting plate and focussed migration into the Neogene basin fill above Cretaceous‒Paleogene structures. The third trend (III) follows the northern margin of the Hikurangi Channel and is related to the presence of buried strata of the Hikurangi Channel system.

Simple

Date (Creation)
2019-08-21
Credit

GNS Science, NIWA

Point of contact
Organisation name Individual name Electronic mail address Role

GNS Science

resources@gns.cri.nz

Custodian
Maintenance and update frequency
Unknown
Keywords
  • predicted gas hydrate distribution

  • New Zealand

Place
  • Hikurangi Margin

Discipline
  • 3D model

Classification
Unclassified
Use constraints
Intellectual property rights
Other constraints

Creative Commons Attribution-ShareAlike 4.0 International License ( https://creativecommons.org/licenses/by-sa/4.0/ )

Spatial representation type
Grid
Distance
500   500 m
Denominator
500000
Language
English
Topic category
  • Geoscientific information
Environment description

Marine sub-seafloor

Geographic identifier
EPSG:2193
Distribution format
Name Version

zmap

OnLine resource
Protocol Linkage Name

WWW:LINK-1.0-http--link

WWW:LINK-1.0-http--link

https://data.gns.cri.nz/mapservice/Content/public/Paper_data/hikurangi_hydrates.zip

Model data

WWW:DOWNLOAD-1.0-http--download

https://huta22.gns.cri.nz/metadata/srv/api/records/20d430a6-6f0a-4770-86fe-2d0f13cb0b41/attachments/Location2.jpg Location
Hierarchy level
Dataset
Statement

Kroeger, K.F.; Crutchley, G.J.; Kellett, R.L.; Barnes, P. 2019. A 3D model of gas generation, migration and gas hydrate formation at a young convergent margin (Hikurangi Margin, New Zealand). Geochemistry Geophysics Geosystems, 10.1029/2019GC008275

Metadata

File identifier
20d430a6-6f0a-4770-86fe-2d0f13cb0b41 XML
Metadata language
English
Character set
UTF8
Hierarchy level
Dataset
Hierarchy level name

Dataset

Date stamp
2020-06-22T11:45:17
Metadata standard name

ISO 19115:2003/19139

Metadata standard version

1.0

Metadata author
Organisation name Individual name Electronic mail address Role

GNS Science

datamanagement@gns.cri.nz

Point of contact
 
 

Overviews

overview
Location.jpg

Spatial extent

Keywords

3D model

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