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Waples, Douglas

doi:10.1023/a:1012521309181

Cited by 34 publications

(7 citation statements)

References 46 publications

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“…Thus, we associate this slight increase in basal heat flow to the Late Carboniferous to Triassic extensional event (Point Moody Extension) that preceded the Jurassic Fitzroy Transpressional Movement. During extension, heat flow is generally raised due to the upwelling of the hot asthenosphere beneath the stretched and thinned lithosphere (Allen and Allen, 2013;McKenzie, 1978;Waples, 2001). Heat flow may vary little or significantly long after the extensional event.…”

Section: Magnitude Of Exhumation From Compaction Methodsmentioning

confidence: 99%

The Magnitude of Exhumation in the Kidson Sub-Basin, Western Australia, Usingthermal and Compaction Techniques

Marfo¹,

Palu

Makuluni

et al. 2022

SSRN Journal

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Section: Magnitude Of Exhumation From Compaction Methodsmentioning

confidence: 99%

The Magnitude of Exhumation in the Kidson Sub-Basin, Western Australia, Usingthermal and Compaction Techniques

Marfo¹,

Palu

Makuluni

et al. 2022

SSRN Journal

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“…As previously mentioned, a high heat flow stage is modelled for the Permian-Triassic interval, with maximum values of 90 mW/m 2 coinciding with the rift opening stage (cf. Waples, 2001) and a progressive decrease until 70 mW/m 2 at the final stage of post-rift (Figure 10). These high heat flow values allow us to explain the ZHe ages of Pennsylvanian deposits.…”

Section: Thermal History Model (Petromod)mentioning

confidence: 97%

Thermochronometry unveils ancient thermal regimes in the NW Pampean Ranges, Argentina: From Mesozoic rifting to Miocene flat‐slab subduction

et al. 2022

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Reconstructing thermal histories in thrust belts is commonly used to infer the age and rates of thrusting and hence the driving mechanisms of orogenesis. In areas where ancient basins have been incorporated into the orogenic wedge, a quantitative reconstruction of the thermal history helps distinguish among potential mechanisms responsible for heating events. We present such a reconstruction for the Ischigualasto‐Villa Unión basin in the western Pampean Ranges of Argentina, where Triassic rifting and late Cretaceous‐Cenozoic retroarc foreland basin development has been widely documented, including Miocene flat‐slab subduction. We report results of organic and inorganic thermal indicators acquired along three stratigraphic sections, including vitrinite reflectance and X‐ray diffractometry in claystones and new thermochronological [(apatite fission‐track and apatite and zircon [U‐Th]/He)] analyses. Despite up to 5 km‐thick Cenozoic overburden and unlike previously thought, the thermal peak in the basin is not due to Cenozoic burial but occurred in the Triassic, associated with a high heat flow of up to 90 mWm−2 and <2 km of burial, which heated the base of the Triassic strata to ~160°C. Following exhumation, attested by the development of an unconformity between the Triassic and Late‐Cretaceous–Cenozoic sequences, Cenozoic re‐burial increased the temperature to ~110°C at the base of the Triassic section and only ~50°C 7 km upsection, suggesting a dramatic decrease in the thermal gradient. The onset of Cenozoic cooling occurred at ~10−8 Ma, concomitant with sediment accumulation and thus preceding the latest Miocene onset of thrusting that has been independently documented by stratigraphic–cross‐cutting relationships. We argue that the onset of cooling is associated with lithospheric refrigeration following establishment of flat‐slab subduction, leading to the eastward displacement of the asthenospheric wedge beneath the South American plate. Our study places time and temperature constraints on flat‐slab cooling that calls for a careful interpretation of exhumation signals in thrustbelts inferred from thermochronology only.

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“…Thus, we associate this slight increase in basal heat flow to the Late Carboniferous to Early Triassic extensional event (Point Moody Extension) that preceded the Jurassic Fitzroy Transpressional Movement. During extension, heat flow is generally raised due to the upwelling of the hot asthenosphere beneath the stretched and thinned lithosphere (Allen and Allen, 2013;McKenzie, 1978;Waples, 2001). Heat flow may vary little or significantly long after the extensional event.…”

Section: Temperature Profiles and Geothermal Gradients In The Kidson ...mentioning

confidence: 99%

The Magnitude of Exhumation in the Kidson Sub-basin, Western Australia, using Thermal and Compaction Techniques

Marfo

Makuluni

Clark

2022

Preprint

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The Kidson Sub-basin which forms the largest tectonic province of the Canning Basin has a high potential for Uranium, sediment-hosted base metals, conventional and unconventional hydrocarbons. The basin has undergone major tectonic events since its formation in the Early Ordovician involving several inversion episodes resulting in extensive exhumation in the basin. The magnitude, timing and distribution of exhumation associated with these inversion episodes are poorly studied due to sparse data in the area. In this study, we integrate recently acquired seismic data with existing well data, combining for the first time thermal and compaction techniques to constrain the magnitude and distribution of exhumation associated with these major inversion episodes. Our results indicate that 300 to 500 m of exhumation occurred during the middle Silurian to Early Devonian inversion episode or Prices Creek Compression, 500 to 750 m of exhumation occurred during the middle Carboniferous inversion episode or Meda Transpression and 800 to 1200 m of exhumation occurred during the Late Triassic to Early Jurassic inversion episode or Fitzroy Transpression. Data from apatite fission-track analysis put temporal constraints on the timing of this exhumation and indicate that cooling from maximum post-depositional temperatures within the Kidson Sub-basin occurred in the Late Triassic to Early Jurassic. This imply that a paleothermal maximum was reached within the Kidson Sub-basin during the Early Triassic extension episode, prior to the Fitzroy Transpression. During this period, we also detect that the sediments were affected by a slight increase in basal heat flow associated with the rifting event. Results illustrate that during each of these inversion events, higher amounts of exhumation affected the Kidson Sub-basin than previously thought. The results from this study also demonstrate two dominant factors controlling the spatial and temporal distribution of exhumation in the Kidson Sub-basin. We suggest that the spatial distribution of exhumation in the sub-basin during each inversion episode was dominantly controlled by variation in rheology (strength) of inherited basement units, whilst the temporal distribution of exhumation was dominantly controlled by variation in the magnitude of compressive stress.

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Cited by 34 publications

References 46 publications

The Magnitude of Exhumation in the Kidson Sub-Basin, Western Australia, Usingthermal and Compaction Techniques

The Magnitude of Exhumation in the Kidson Sub-Basin, Western Australia, Usingthermal and Compaction Techniques

Thermochronometry unveils ancient thermal regimes in the NW Pampean Ranges, Argentina: From Mesozoic rifting to Miocene flat‐slab subduction

The Magnitude of Exhumation in the Kidson Sub-basin, Western Australia, using Thermal and Compaction Techniques

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