Aspects of the structural histories of the tertiary sedimentary basins of East, Central and West Kalimantan and their margins

The Cainozoic structural history of west, central and east Kalimantan may have begun with formation of melange in the early Eocene, and a surrounding disturbed zone in which part of a mainly Cretaceous flysch trough and associated shelf deposits have been thrown into a confusion of dips and strikes. Uplift of the disturbed zone and adjacent southem outer shelf deposits of the trough was followed by sub-aerial extrusion of mid Eocene volcanics. Between early late Eocene and mid Oligocene times bursts of compression produced structural highs and a shifting pattern of complementary flanking basin depocentres. Uplifted flysch-trough sediments became a northern provenance for the basins (and perhaps a southern provenance for more flysch deposition to the north) and may have been folded further in the process. In the south the Schwaner Batholith provided a bulwark to compression, although its northern margin was upwarped as a consequence. In the east deposits prograded southeastwards away from the northern provenance. As compression tailed off and basin down warping and northern flysch provenance uplift consequently diminished, a peneplane may have begun to form on the flysch. This would have gradually decreased the amount of detritus available for filling the gradually shallowing basins. In the west downwarping and deposition probably ceased in the early Oligocene as a result of regional uplift. In the east renewed compression in the mid Oligocene caused uplift and folding, and interrupted prograding deposition. Penecontemporaneous intrusion of acid to intermediate stocks, plugs, dykes and sills occurred in both east and west. Prograding deposition recommenced in the east in the late Oligocene and has continued intermittently since; the northwestern provenance for the deposits has been uplifted from time to time, on occasion in conjunction with volcanism. The flysch fold belt that is central to the island of Borneo, on the evidence from the region analysed, was bent to its present shape in mid to late Tertiary times.

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Date (Publication)
1992-01-01T00:00:00
Citation identifier
Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/81322

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Bureau of Mineral Resources, Geology and Geophysics

 Canberra
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Doutch, H.F.

 1
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BMR Journal of Australian Geology and Geophysics

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13:3:237-250

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Commonwealth of Australia (Geoscience Australia)
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Commonwealth of Australia (Geoscience Australia)

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Product data repository: Various Formats

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Australian and New Zealand Standard Research Classification (ANZSRC)

  • Earth Sciences

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Creative Commons Attribution 4.0 International Licence

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2018-11-01T00:00:00
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English
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Journal article (pdf)

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Australian Government Security ClassificationSystem

Edition date
2018-11-01T00:00:00
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https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified

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urn:uuid/fae9173a-7107-71e4-e044-00144fdd4fa6

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English
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UTF8
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Commonwealth of Australia (Geoscience Australia)

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Document
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AGSO BMR Journal

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Geoscience Australia - short identifier for metadata record with

uuid

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eCatId/81322

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https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/fae9173a-7107-71e4-e044-00144fdd4fa6

Date info (Revision)
2018-04-20T06:08:00
Date info (Creation)
2014-06-03T00:00:00

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AU/NZS ISO 19115-1:2014

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ISO 19115-1:2014

Metadata standard

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ISO 19115-3

Title

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

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Version 2.0, September 2018

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

 
 

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