Chemical and mineralogical characterisation of illite–smectite: Implications for episodic tectonism and associated fluid flow, central Australia

Middleton, Alexander W.; Uysal, I. Tonguç; Golding, Suzanne D.

doi:10.1016/j.gca.2014.09.035

Cited by 14 publications

(8 citation statements)

References 77 publications

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“…The modeled peak paleotemperature was reached at circa 90 Ma, ranges between approximately 180°C and 260°C depending on the depocenter, and is generally less than 10°C greater than present day (Hall et al, 2016c). Although the timing of this event is consistent with previously published studies, the magnitude of the peak temperature reached within the Nappamerri trough in this model is more than 40°C lower than suggested by previous studies (e.g., Deighton and Hill, 1998;Duddy and Moore, 1999;Deighton et al, 2003;Middleton et al, 2015). The discrepancy arises from the use of the LLNL model by previous studies for areas where R o is much greater than 2%, which resulted in significant overestimates of maximum paleotemperatures.…”

Section: Hydrocarbon Generationsupporting

confidence: 87%

Hydrocarbon prospectivity of the Cooper Basin, Australia

Hall

Palu

Murray³

et al. 2019

Bulletin

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The Pennsylvanian-Middle Triassic Cooper Basin is Australia's premier conventional onshore hydrocarbon-producing province. The basin also hosts a range of unconventional gas play types, including basin-centered gas and tight gas accumulations, deep dry coal gas associated with the Patchawarra and Toolachee Formations, and the Murteree and Roseneath shale gas plays.This study used petroleum systems analysis to investigate the maturity and generation potential of 10 Permian source rocks in the Cooper Basin. A deterministic petroleum systems model was used to quantify the volume of expelled and retained hydrocarbons, estimated at 1272 billion BOE (512 billion bbl and 760 billion BOE) and 977 billion BOE (362 billion bbl and 615 billion BOE), respectively. Monte Carlo simulations were used to quantify the uncertainty in volumes generated and to demonstrate the sensitivity of these results to variations in source-rock characteristics.The large total generation potential of the Cooper Basin and the broad distribution of the Permian source kitchen highlight the basin's significance as a world-class hydrocarbon province. The large disparity between the calculated volume of hydrocarbons generated and the volume so far found in reservoirs indicates the potential for large volumes to remain within the basin, despite significant losses from leakage and water washing. The hydrocarbons expelled have provided abundant charge to both conventional accumulations and to the tight and basin-centered gas plays, and the broad spatial distribution of hydrocarbons remaining within the source rocks, especially those within the Toolachee and Patchawarra Formations, suggests the potential for widespread shale and deep dry coal plays.

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Section: Hydrocarbon Generationsupporting

confidence: 87%

Hydrocarbon prospectivity of the Cooper Basin, Australia

Hall

Palu

Murray³

et al. 2019

Bulletin

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“…Therefore, the 40 Ar/ 39 Ar plateau age in this study has higher accuracy, precision and trueness than preexisting K-Ar determinations. Similar characteristics can be assumed for the Rb-Sr isochron age in illite for the veins at the Sierra system, as the reliability of this method has been consistently validated (e.g., Middleton et al, 2015). Differences in age of ~2 m.yr.…”

Section: Discussionmentioning

confidence: 82%

Geochronology of Mexican mineral deposits. II: Veta Madre and Sierra epithermal vein systems, Guanajuato district

Martínez-Reyes

Camprubí

Uysal

et al. 2015

BSGM

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This paper presents two new high-resolution geochronological determinations for the epithermal deposits in the World-class Guanajuato mining district, in central Mexico. These are a Rb-Sr isochron age in illite at 28.47 ± 0.55 Ma for the Villalpando and San Juan de Dios low sulfidation veins of the Sierra group of veins, and a 40 Ar/ 39 Ar plateau age in adularia ("valencianite") at 30.20 ± 0.17 Ma for the La Valenciana ore shoot of the famous Veta Madre intermediate sulfidation vein. These determinations have greater accuracy, precision and trueness than the preexisting K-Ar determinations for similar adularia samples. The accuracy of such determinations supports the idea of a diachronic emplacement of intermediate and low sulfidation deposits in this district, the former being older than the latter, similar to other epithermal deposits in Mexico. Also, the ~2 m.yr. span between the Veta Madre and Sierra groups of epithermal veins is in agreement with other case studies, regardless of the size of the deposit.

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“…The connection between areas showing advanced reaction progress in I-S evolution and the activity of fluids in faulted zones has been mentioned previously for different basins (Uysal et al, 2000;Abid & Hesse, 2007;Abad et al, 2010Abad et al, , 2012Middleton et al, 2015). In several cases, the authors could not conclude with certainty whether fluids were involved directly in smectite illitization or if they only acted as heat carriers (Uysal et al, 2000).…”

Section: Evolution and Genesis Of Claysmentioning

confidence: 89%

“…Altaner et al, 1984;Ahn & Peacor, 1989;Jiang et al, 1990;Veblen et al, 1990;Dong & Peacor, 1996;Nieto et al, 1996;Altaner & Ylagan, 1997;Dong et al, 1997;Bauluz et al, 2000;Abad et al, 2004;Cuadros, 2006) and has also been reproduced in laboratory experiments (Whitney & Northrop, 1988;Huang et al, 1993). In addition, several studies have demonstrated the importance of fluid/rock ratios in this transformation (Whitney, 1990;Middleton et al, 2015).…”

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confidence: 82%

SEM and TEM evidence of mixed-layer illite-smectite formed by dissolutioncrystallization processes in continental Paleogene sequences in northwestern Argentina

et al. 2016

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A B S T R AC T : In the northernmost Calchaquí Valley (Salta, Argentina), the Paleogene continental sediments show a transition from smectite, at the top, to R3 I-S (>90% illite) through R1 I-S (65-80% illite), in contrast to the remaining sectors, containing smectite up to the bottom. Samples at the base of the succession were characterized by high-quality step-scan X-ray diffraction (XRD), scanning electron microscopy (SEM) and analytical high-resolution transmission electron microscopy (HRTEM). Analysis by SEM demonstrated dissolution of primary phases (feldspars, micas and quartz) and crystallization of illite, I-S and kaolinite. As this alteration is not pervasive, an intermediate fluid/rock ratio could be inferred. The lattice-fringe images of the samples from upper parts of the sequence show abundant I1-rich areas, whereas in the lower parts of the sequence, illite packets and I3 I-S coexist and compositions evolve towards muscovite (tetrahedral-charge increase, principally compensated by Mgby-Al substitution in octahedral sites and by a slight decrease in Ca in interlayer sites). As burial temperatures were probably similar in all the samples, depth was not responsible for the illite formation at the bottom. The TEM textures suggest that illitization proceeded mainly by dissolution-crystallization. The active faults close to the northern Calchaquí Valley probably promoted the circulation of hot, deep fluids, favouring illitization.

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Chemical and mineralogical characterisation of illite–smectite: Implications for episodic tectonism and associated fluid flow, central Australia

Cited by 14 publications

References 77 publications

Hydrocarbon prospectivity of the Cooper Basin, Australia

Hydrocarbon prospectivity of the Cooper Basin, Australia

Geochronology of Mexican mineral deposits. II: Veta Madre and Sierra epithermal vein systems, Guanajuato district

SEM and TEM evidence of mixed-layer illite-smectite formed by dissolutioncrystallization processes in continental Paleogene sequences in northwestern Argentina

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