Analysis of the Ragged Basin, Western Australia: Insights into syn-orogenic basin evolution within the Albany-Fraser Orogen

Peter Jon A Waddell, Nicholas E. Timms, Catherine V. Spaggiari, Christopher L. Kirkland, Michael T.D. Wingate

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Australian Albany-Fraser Orogen evolution insights from Ragged Basin analysis. Sedimentary basins occur within a variety of tectonic settings, both within plates and near plate boundaries. We explore the complex history of the Mesoproterozoic Ragged Basin, located in the eastern Nornalup Zone of the Albany-Fraser Orogen, which is part of the West Australian Craton. Sediments of the Ragged Basin were deposited within a shallow basin by a large fluvial system dominated by shifting, sandy braided channels, forming a quartz-rich succession defined as the Mount Ragged Formation. The gradual coarsening upwards sequence indicates a distal fluvial environment characterised by channel migration and abandonment, changing to a proximal fluvial environment characterised by rapid periods of sedimentation and coarser deposits. Ion microprobe (SHRIMP) U-Pb analysis of detrital zircons constrain a maximum depositional age of 1314 ± 19. Ma for the Mount Ragged Formation, so it is feasible that deposition started during the latter part of Stage I (c. 1330-1260. Ma) of the Albany-Fraser Orogeny. The detrital zircon U-Pb data demonstrates that the Mount Ragged Formation contains c. 1810-1320. Ma detritus, most of which appears to be derived locally from the reworked craton margin that forms the Albany-Fraser Orogen basement. However, the smaller c. 1560 and c. 2490. Ma zircon age components have no known source within the West Australian Craton, and were potentially originally sourced from the Gawler Craton or other unknown sources beneath the Eucla and Bight Basins. These exotic ages support the interpretation that outboard accretion occurred prior to Stage II of the Albany-Fraser Orogeny. New structural data, field observations and aeromagnetic image interpretation indicate that the Mount Ragged Formation was deformed by a northwest-vergent fold and thrust system. A minimum age for deposition, and structural emplacement, is provided by a crystallisation age of 1175 ± 12. Ma for a cross-cutting monzogranite exposed at Scott Rock, part of the Esperance Supersuite. Upper-crustal thrusting in the Mount Ragged Formation can be linked to deeper, large-scale regional structures such as the Tagon and Rodona Shear Zones, the latter of which represents the eastern edge of the Albany-Fraser Orogen.

Original languageEnglish
Pages (from-to)166-187
Number of pages22
JournalPrecambrian Research
Volume261
DOIs
Publication statusPublished - 1 May 2015
Externally publishedYes

Fingerprint

basin evolution
craton
basin
zircon
Quartz
orogeny
Coarsening
Tectonics
Crystallization
Sedimentation
Sediments
basin analysis
Deposits
Rocks
Ions
ion microprobe
plate boundary
tectonic setting
sedimentary basin
detritus

Cite this

Waddell, Peter Jon A ; Timms, Nicholas E. ; Spaggiari, Catherine V. ; Kirkland, Christopher L. ; Wingate, Michael T.D. / Analysis of the Ragged Basin, Western Australia : Insights into syn-orogenic basin evolution within the Albany-Fraser Orogen. In: Precambrian Research. 2015 ; Vol. 261. pp. 166-187.
@article{6cd9ab0ac9034dcb8416f6f05af3a3a3,
title = "Analysis of the Ragged Basin, Western Australia: Insights into syn-orogenic basin evolution within the Albany-Fraser Orogen",
abstract = "Australian Albany-Fraser Orogen evolution insights from Ragged Basin analysis. Sedimentary basins occur within a variety of tectonic settings, both within plates and near plate boundaries. We explore the complex history of the Mesoproterozoic Ragged Basin, located in the eastern Nornalup Zone of the Albany-Fraser Orogen, which is part of the West Australian Craton. Sediments of the Ragged Basin were deposited within a shallow basin by a large fluvial system dominated by shifting, sandy braided channels, forming a quartz-rich succession defined as the Mount Ragged Formation. The gradual coarsening upwards sequence indicates a distal fluvial environment characterised by channel migration and abandonment, changing to a proximal fluvial environment characterised by rapid periods of sedimentation and coarser deposits. Ion microprobe (SHRIMP) U-Pb analysis of detrital zircons constrain a maximum depositional age of 1314 ± 19. Ma for the Mount Ragged Formation, so it is feasible that deposition started during the latter part of Stage I (c. 1330-1260. Ma) of the Albany-Fraser Orogeny. The detrital zircon U-Pb data demonstrates that the Mount Ragged Formation contains c. 1810-1320. Ma detritus, most of which appears to be derived locally from the reworked craton margin that forms the Albany-Fraser Orogen basement. However, the smaller c. 1560 and c. 2490. Ma zircon age components have no known source within the West Australian Craton, and were potentially originally sourced from the Gawler Craton or other unknown sources beneath the Eucla and Bight Basins. These exotic ages support the interpretation that outboard accretion occurred prior to Stage II of the Albany-Fraser Orogeny. New structural data, field observations and aeromagnetic image interpretation indicate that the Mount Ragged Formation was deformed by a northwest-vergent fold and thrust system. A minimum age for deposition, and structural emplacement, is provided by a crystallisation age of 1175 ± 12. Ma for a cross-cutting monzogranite exposed at Scott Rock, part of the Esperance Supersuite. Upper-crustal thrusting in the Mount Ragged Formation can be linked to deeper, large-scale regional structures such as the Tagon and Rodona Shear Zones, the latter of which represents the eastern edge of the Albany-Fraser Orogen.",
keywords = "Albany-Fraser Orogen, Basin evolution, Detrital zircon, Mount ragged formation, Proterozoic, Quartzite",
author = "Waddell, {Peter Jon A} and Timms, {Nicholas E.} and Spaggiari, {Catherine V.} and Kirkland, {Christopher L.} and Wingate, {Michael T.D.}",
year = "2015",
month = "5",
day = "1",
doi = "10.1016/j.precamres.2015.02.010",
language = "English",
volume = "261",
pages = "166--187",
journal = "Precambrian Research",
issn = "0301-9268",
publisher = "Pergamon",

}

Analysis of the Ragged Basin, Western Australia : Insights into syn-orogenic basin evolution within the Albany-Fraser Orogen. / Waddell, Peter Jon A; Timms, Nicholas E.; Spaggiari, Catherine V.; Kirkland, Christopher L.; Wingate, Michael T.D.

In: Precambrian Research, Vol. 261, 01.05.2015, p. 166-187.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Analysis of the Ragged Basin, Western Australia

T2 - Insights into syn-orogenic basin evolution within the Albany-Fraser Orogen

AU - Waddell, Peter Jon A

AU - Timms, Nicholas E.

AU - Spaggiari, Catherine V.

AU - Kirkland, Christopher L.

AU - Wingate, Michael T.D.

PY - 2015/5/1

Y1 - 2015/5/1

N2 - Australian Albany-Fraser Orogen evolution insights from Ragged Basin analysis. Sedimentary basins occur within a variety of tectonic settings, both within plates and near plate boundaries. We explore the complex history of the Mesoproterozoic Ragged Basin, located in the eastern Nornalup Zone of the Albany-Fraser Orogen, which is part of the West Australian Craton. Sediments of the Ragged Basin were deposited within a shallow basin by a large fluvial system dominated by shifting, sandy braided channels, forming a quartz-rich succession defined as the Mount Ragged Formation. The gradual coarsening upwards sequence indicates a distal fluvial environment characterised by channel migration and abandonment, changing to a proximal fluvial environment characterised by rapid periods of sedimentation and coarser deposits. Ion microprobe (SHRIMP) U-Pb analysis of detrital zircons constrain a maximum depositional age of 1314 ± 19. Ma for the Mount Ragged Formation, so it is feasible that deposition started during the latter part of Stage I (c. 1330-1260. Ma) of the Albany-Fraser Orogeny. The detrital zircon U-Pb data demonstrates that the Mount Ragged Formation contains c. 1810-1320. Ma detritus, most of which appears to be derived locally from the reworked craton margin that forms the Albany-Fraser Orogen basement. However, the smaller c. 1560 and c. 2490. Ma zircon age components have no known source within the West Australian Craton, and were potentially originally sourced from the Gawler Craton or other unknown sources beneath the Eucla and Bight Basins. These exotic ages support the interpretation that outboard accretion occurred prior to Stage II of the Albany-Fraser Orogeny. New structural data, field observations and aeromagnetic image interpretation indicate that the Mount Ragged Formation was deformed by a northwest-vergent fold and thrust system. A minimum age for deposition, and structural emplacement, is provided by a crystallisation age of 1175 ± 12. Ma for a cross-cutting monzogranite exposed at Scott Rock, part of the Esperance Supersuite. Upper-crustal thrusting in the Mount Ragged Formation can be linked to deeper, large-scale regional structures such as the Tagon and Rodona Shear Zones, the latter of which represents the eastern edge of the Albany-Fraser Orogen.

AB - Australian Albany-Fraser Orogen evolution insights from Ragged Basin analysis. Sedimentary basins occur within a variety of tectonic settings, both within plates and near plate boundaries. We explore the complex history of the Mesoproterozoic Ragged Basin, located in the eastern Nornalup Zone of the Albany-Fraser Orogen, which is part of the West Australian Craton. Sediments of the Ragged Basin were deposited within a shallow basin by a large fluvial system dominated by shifting, sandy braided channels, forming a quartz-rich succession defined as the Mount Ragged Formation. The gradual coarsening upwards sequence indicates a distal fluvial environment characterised by channel migration and abandonment, changing to a proximal fluvial environment characterised by rapid periods of sedimentation and coarser deposits. Ion microprobe (SHRIMP) U-Pb analysis of detrital zircons constrain a maximum depositional age of 1314 ± 19. Ma for the Mount Ragged Formation, so it is feasible that deposition started during the latter part of Stage I (c. 1330-1260. Ma) of the Albany-Fraser Orogeny. The detrital zircon U-Pb data demonstrates that the Mount Ragged Formation contains c. 1810-1320. Ma detritus, most of which appears to be derived locally from the reworked craton margin that forms the Albany-Fraser Orogen basement. However, the smaller c. 1560 and c. 2490. Ma zircon age components have no known source within the West Australian Craton, and were potentially originally sourced from the Gawler Craton or other unknown sources beneath the Eucla and Bight Basins. These exotic ages support the interpretation that outboard accretion occurred prior to Stage II of the Albany-Fraser Orogeny. New structural data, field observations and aeromagnetic image interpretation indicate that the Mount Ragged Formation was deformed by a northwest-vergent fold and thrust system. A minimum age for deposition, and structural emplacement, is provided by a crystallisation age of 1175 ± 12. Ma for a cross-cutting monzogranite exposed at Scott Rock, part of the Esperance Supersuite. Upper-crustal thrusting in the Mount Ragged Formation can be linked to deeper, large-scale regional structures such as the Tagon and Rodona Shear Zones, the latter of which represents the eastern edge of the Albany-Fraser Orogen.

KW - Albany-Fraser Orogen

KW - Basin evolution

KW - Detrital zircon

KW - Mount ragged formation

KW - Proterozoic

KW - Quartzite

UR - http://www.scopus.com/inward/record.url?scp=84923352427&partnerID=8YFLogxK

U2 - 10.1016/j.precamres.2015.02.010

DO - 10.1016/j.precamres.2015.02.010

M3 - Article

VL - 261

SP - 166

EP - 187

JO - Precambrian Research

JF - Precambrian Research

SN - 0301-9268

ER -