The thermal history of the Bowen Basin, Queensland, Australia: vitrinite reflectance and clay mineralogy of Late Permian coal measures

Uysal, I. Tonguç; Glikson, M.; Golding, Suzanne D.; Audsley, Frank

doi:10.1016/s0040-1951(00)00098-6

Cited by 61 publications

(17 citation statements)

References 58 publications

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“…Vitrinite reflectance (Ro) values in the Bowen Basin range from 0.45% Ro in the Rangal Coal Measures in the southern part of the basin to over 3.5% Ro in the Moranbah Coal Measures in the northern Bowen Basin. The Late Permian sections have significantly high reflectance gradients, which are similar to those for basins with high geothermal gradients (Uysal et al, 2000a). These results and the radiometric dating of I-S suggest that organic maturation and widespread illite formation in the Bowen Basin Coal Measures occurred largely as a result of a short-lived hydrothermal event at -2 1 0 Ma during an extensional phase rather than a result of maximum burial in the Middle Triassic (Uysal et al, 2000b).…”

Section: Introductionsupporting

confidence: 61%

Clay-Mineral Authigenesis in the Late Permian Coal Measures, Bowen Basin, Queensland, Australia

Uysal

Golding

Audsley

2000

Clays and clay miner.

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Abstract--Mineralogical studies were performed on authigenic clay minerals of mudrocks, sandstones, and bentonites from 38 boreholes in the Late Permian coal measures of the Bowen Basin. Clay-mineral separations of samples from the northern Bowen Basin consist mainly of (Reichweite, R) R = 1 and R --> 3 interstratified illite-smectite (I-S), chlorite, and kaolinite. In the southern Bowen Basin, samples from higher stratigraphic sections are characterized by randomly ordered (R = 0) I-S mixed layers, and kaolinite and chlorite in smaller amounts. Samples from the lower sections consist of (R -> 3) I-S, chlorite, chloriterich chlorite-smectite (C-S), and laumontite.Examination of the mineralogy and distribution of authigenic clay minerals from the Late Permian coal measures in the northern part of the Bowen Basin indicated that the presence of clay minerals is not systematically related to depth and clay occurrences do not occur regularly. These mineralogical variations of clay in volcaniclastic sediments are incompatible with thermal control. Variations in the rate of fluid flow and potassium supply owing to permeability exert major influences on clay-mineral paragenesis and the reaction of illitization. In more permeable zones (possibly faults or fracture zones), highly illitic clays with lath-shaped morphologies may have precipitated directly from potassium-rich fluids migrating from deeper parts of the basin. In addition, abundant chlorite precipitated contemporaneously with illitic clays, which may have resulted from sufficient magnesium and iron occurring in the fluids as a result of dissolution of intermediate or mafic-rock fragments. At the same time, clay paragenesis with less illitic I-S, kaolinite, and minor chlorite occurs outside the channelized zones of high fluid flow, where a diffusive-flow regime may have predominated with lower ratios of the activities of K § and H + (i.e., etK+/ aH~) in the solutions.In the southern Bowen Basin, depth-related changes in the distribution of clay minerals are evident and may be indicative of thermal control on clay-mineral reactions. Zeolites are present locally in the Late Permian volcaniclastic rocks in the southern Bowen Basin, but not in the north. This is attributed to a low ratio of aco2/C~H2o (where c~ = activity) and/or more saline and alkaline solutions.

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Section: Introductionsupporting

confidence: 61%

Clay-Mineral Authigenesis in the Late Permian Coal Measures, Bowen Basin, Queensland, Australia

Uysal

Golding

Audsley

2000

Clays and clay miner.

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“…Previous studies have attributed the thermal anomalies in sedimentary basins to the effects of hot fluids that tend to migrate along fault planes and fracture zones (e.g. Uysal et al . 2000; Lee et al .…”

Section: Discussionmentioning

confidence: 99%

Thermal maturity assessment of the Upper Triassic to Lower Jurassic Nampo Group, mid‐west Korea: Reconstruction of thermal history

Egawa

Lee

2007

Island Arc

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Thermal maturity of the Upper Triassic to Lower Jurassic Nampo Group, a sediment‐fill of the Chungnam Basin located in the central western part of South Korea, was assessed by illite crystallinity measurement and sandstone microtexture analysis. The Nampo Group consists of a fluvio‐lacustrine deposit bearing meta‐anthracitic coals and was over‐thrusted by the basement rocks. Sandstones are characterized by down sequence increasing illite crystallinity, from anchizone to epizone, which is strongly suggestive of burial heating. Deep‐burial diagenesis and deformation are evidenced by well‐developed pressure solution textures, whose intensity tends to increase down sequence, and by ductile deformation in the lowermost strata. On the basis of the result of illite crystallinity measurement, the maximum paleo‐temperature and total burial depth of the Nampo Group are estimated to be ca 340°C and 10 km, respectively; these conditions are in good agreement with the observed ductile deformation features. The absence of strata younger than the Nampo Group in and around the Chungnam Basin suggests that deep burial of the Nampo Group was caused by tectonic crustal loading. The tectonic overload was because of basement over‐thrusting that occurred during the Jurassic Daebo orogeny, which is closely related to the orthogonal subduction of the Izanagi Plate beneath the East Asian continent. Subsequent hydrothermal alteration disturbed the thermal maturity pattern, resulting in anomalously high illite crystallinity and meta‐anthracitization.

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“…This period is coincident with previous thermochronological studies that record a substantial "recrystallisation event" of K-feldspar from the BLS, at ≤260°C from 120-80 Ma attributed to "rapid sediment accumulation and probably structural modification" (McLaren and Dunlap, 2006). As K-feldspar acts as an efficient "hygrochronometer" (Villa, 2013;Villa and Hanchar, 2013), previously noted recrystallisation likely relates to an episodic ingress of hydrothermal fluids capable of perturbing local geothermal gradients (Uysal et al, 2000).…”

Section: Nappamerri Troughmentioning

confidence: 99%

Integrating 40Ar–39Ar, 87Rb–87Sr and 147Sm–143Nd geochronology of authigenic illite to evaluate tectonic reactivation in an intraplate setting, central Australia

Middleton

Uysal

Bryan

et al. 2014

Geochimica et Cosmochimica Acta

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The thermal history of the Bowen Basin, Queensland, Australia: vitrinite reflectance and clay mineralogy of Late Permian coal measures

Cited by 61 publications

References 58 publications

Clay-Mineral Authigenesis in the Late Permian Coal Measures, Bowen Basin, Queensland, Australia

Clay-Mineral Authigenesis in the Late Permian Coal Measures, Bowen Basin, Queensland, Australia

Thermal maturity assessment of the Upper Triassic to Lower Jurassic Nampo Group, mid‐west Korea: Reconstruction of thermal history

Integrating 40Ar–39Ar, 87Rb–87Sr and 147Sm–143Nd geochronology of authigenic illite to evaluate tectonic reactivation in an intraplate setting, central Australia

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