Burial Dolomitization of the Upper Devonian Miette Buildup, Jasper National Park, Alberta

Mattes, Bret W.; Mountjoy, Eric W.

doi:10.2110/pec.80.28.0259

Cited by 123 publications

(108 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The same trend-isotopically slightly lighter dolomite II-was found also by Fontboté and Gorzawski (1990) for the burial dolostones at San Vicente, Peru, by Gasparrini and others (2006) for burial dolostones of the Cantabrian Zone, northern Spain, and by Mattes and Mountjoy (1980).…”

supporting

confidence: 77%

“…Then the competition for reactive flux continues among the fingers themselves, leading to successive jumps in the size and spacing of the lobes (Szymczak and Ladd, 2006). Actual fingering of the dolomitization front has been described by Mattes and Mountjoy (1980) for the Miette buildup of Alberta; Wilson and others (1990) for the Latemar buildup of northern Italy; Gasparrini and others (2006) for Upper Carboniferous carbonates of the Cantabrian Zone of northwestern Spain (fig. 2A); and many others.…”

Section: Lobed Dolomitization Front and The Reactive Infiltration Insmentioning

confidence: 97%

See 1 more Smart Citation

Self-accelerating dolomite-for-calcite replacement: Self-organized dynamics of burial dolomitization and associated mineralization

Merino¹,

Canals²

2011

American Journal of Science

View full text Add to dashboard Cite

ABSTRACT. A new dynamic model of dolomitization predicts a multitude of textural, paragenetic, geochemical and other properties of burial dolomites. The model is based on two postulates, (1) that the dolomitizing brine is Mg-rich but undersaturated with both calcite and dolomite, and (2) that the dolomite-for-calcite replacement happens not by dissolution-precipitation as usually assumed, but by dolomite-growth-driven pressure solution of the calcite host. Crucially, the dolomitefor-calcite replacement turns out to be self-accelerating via Ca 2؉ : the Ca 2؉ released by each replacement increment accelerates the rate of the next, and so on. As a result, both pore-fluid Ca 2؉ and replacement rate grow exponentially. As brine enters and infiltrates a limestone, water/rock disequilibrium plus the self-accelerating feedback inevitably yield a process that is self-organized, both in time (as repeated dolomite growth pulses per slice of limestone) and in space (as successive slices). Self-organization in pulses and slices accounts for several properties of burial dolomites: (1) generation of dissolution porosity and its spatially periodic distribution; (2) dolomitization affects only limestones; (3) sharp field contacts between dolomitized and undolomitized limestone; (4) formation of both saddle dolomite and "late-stage" calcite near the end of each growth pulse, accompanied by MississippiValley-type ores if the brine also contains Zn, Pb, Ba, sulfate, and other relevant elements; (5) "sweeping" of ores downflow with accumulation in the last position of the dolomitization front.In addition, the combination of the self-accelerating feedback via Ca 2؉ with the known strain-rate-softening rheology of crystalline carbonates leads to another suite of predictions that are strikingly confirmed by observation. If the dolomite-for-calcite replacement becomes fast enough to lower the local rock viscosity sufficiently, then the dolomite growth will pass spontaneously from replacive to displacive. This is when thin, self-organized, displacive zebra veins form (Merino and others, 2006), indeed displaying seamless contacts with their replacive walls and consisting of curved, or saddle, dolomite crystals. Serendipitously, both the deformation of the dolomite crystals (produced by Ca-for-Mg substitution driven by the huge pore-fluid Ca 2؉ ) and the seamless rheological transition result from the self-accelerating feedback via Ca 2؉ itself; that is why they are always associated. This detail alone strongly suggests that the new model captures the chemistry, drives, mechanisms, and feedbacks that lend burial dolomitization and its often associated MVT ore deposits their geological uniqueness.

show abstract

supporting

confidence: 77%

Section: Lobed Dolomitization Front and The Reactive Infiltration Insmentioning

confidence: 97%

Self-accelerating dolomite-for-calcite replacement: Self-organized dynamics of burial dolomitization and associated mineralization

Merino¹,

Canals²

2011

American Journal of Science

View full text Add to dashboard Cite

show abstract

“…The very light oxygen isotopic composition, which exhibits a range of values from -8 to -11.3 for 5 18 0, may point to a late diagenetic, low-temperature "metasomatic" origin of dolomitization (Mattes and Mountjoy, 1980). Fluid-inclusion homogenization temperatures ranging from 67° to 84°C (Haggerty and Smith, this volume) support such an interpretation.…”

Section: Dolomitizationmentioning

confidence: 85%

Late Jurassic Carbonate Platform of the Galicia Margin

Jansa¹,

Comas²,

Sarti³

et al. 1988

Proceedings of the Ocean Drilling Program

View full text Add to dashboard Cite

The carbonate platform of Tithonian-?Berriasian age encountered on the western flank of the Galicia Bank at Site 639 is part of an extensive Late Jurassic carbonate shelf extending from Algarve to the Lusitanian Basin, Galicia Bank, and eastern Grand Banks of Newfoundland. The platform, which locally could be up to 400 m thick, probably overlies older sedimentary or low-grade metamorphic strata at Site 639. The 287 m of carbonates penetrated at this site was deposited mainly in shelf lagoon and shelf edge shoals, with localized low-relief biohermal mounds, in response to eustatic sea-level fluctuations and regional subsidence during the Tithonian-Berriasian. Minor block faulting influenced lithofacies distribution at the shelf edge. Shallow burial cementation was the most significant diagenetic event. After burial by several hundred meters of younger sediments, the top of the carbonate platform underwent extensive dolomitization during a period of tectonic fragmentation, followed by subaerial exposure and erosion of the platform. Such processes resulted in a complex carbonate diagenetic history with several periods of dolomitization. The major dolomitization event is the result of the replacement or mixing of formation fluids with evaporitic brines in a shallow subsurface setting. The emerged carbonate platform drowned during the middle early Valanginian as a result of eustatic sea-level rise and tectonic subsidence and was covered by Valanginian turbidites. During a second, more intensive period of tectonic deformation, probably in the late Valanginian, the development of large rotational faults resulted in tilting of the carbonate platform blocks toward the east. After tilting, the outer margin rapidly subsided to abyssal depths during the Late Cretaceous-early Tertiary. The development of the carbonate platform helps in dating the major tensional episodes on the western flank of Galicia Bank as late Berriasian-earliest Valanginian and ?late Valanginian in age.

show abstract

“…The stoichiometry, the texture and possible association with evaporates are generally used to identify different types of dolomite in sedimentary rocks (Morrow, 1978(Morrow, , 1982aLumsden and Chimahusky, 1980). This can also reveal diagenetic environmental settings that affected dolomite formation (Mattes and Mountjoy, 1980;Morrow, 1982;Machel and Mountjoy, 1986). Non-stoichiometric dolomite crystals are thermodynamically metastable under sedimentary conditions and therefore more reactive to diagenetic environments relative to "ideal" dolomites (Carpenter, 1980;Land, 1980;Lumsden and Chimahusky, 1980;Hardie, 1987;Vahrenkamp and Swart, 1994;Chai et al, 1995;Budd, 1997).…”

Section: Introductionmentioning

confidence: 99%

Empirical Calibration for Dolomite Stoichiometry Calculation: Application on Triassic Muschelkalk- Lettenkohle Carbonates (French Jura)

Turpin

Nader

Kohler

2012

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

View full text Add to dashboard Cite

Résumé -Calibration empirique pour le calcul de la stoechiométrie de la dolomite : application aux carbonates triassiques du Muschelkalk-Lettenkohle (Jura français) -Cette étude propose une approche pour la quantification de la dolomite et le calcul de sa stoechiométrie grâce à l'utilisation de la diffraction des rayons X couplée aux affinements de maille et de Rietveld et complétée par de nombreuses données issues de la littérature. Elle permet d'obtenir une meilleure justesse et précision pour la quantification de la dolomite (et des autres phases minérales) ainsi que pour le calcul de sa stoechiométrie par rapport à l'équation de Lumsden et de méthodes antérieures. L'approche proposée est vérifiée grâce à l'analyse d'un échantillon référence de dolomite (Eugui) et appliquée à des roches carbonatées du Trias (Muschelkalk supérieur-Lettenkohle) du Jura français. Elle est combinée à une étude pétrographique et isotopique et peut être appliquée tant aux roches qu'aux ciments dolomitiques. Les dolomies du Muschelkalk supérieur se sont formées au cours d'une dolomitisation d'enfouissement associée à des fluides dont la température augmente et ayant une composition isotopique variable au cours de l'enfouissement. Outre la pétrographie, ceci est également mis en évidence par le pourcentage de Ca calculé dans les dolomites, qui atteint progressivement une stoechiométrie idéale (de 53,16 % à 51,19 %) parallèlement au développement de la dolomitisation. Les dolomites du Lettenkohle montrent une stoechiométrie proche d'une stoechiométrie idéale (51,06 % Ca), sont ordonnées et associées à de l'anhydrite. Leur formation est liée à deux étapes de dolomitisation : de type sabkha et d'enfouissement. Cette étude permet ainsi une meilleure caractérisation des différents types de dolomites dans les roches sédimentaires et par conséquent une meilleure détermination de leur potentiel en tant que réservoir. Abstract

show abstract

Burial Dolomitization of the Upper Devonian Miette Buildup, Jasper National Park, Alberta

Cited by 123 publications

References 0 publications

Self-accelerating dolomite-for-calcite replacement: Self-organized dynamics of burial dolomitization and associated mineralization

Self-accelerating dolomite-for-calcite replacement: Self-organized dynamics of burial dolomitization and associated mineralization

Late Jurassic Carbonate Platform of the Galicia Margin

Empirical Calibration for Dolomite Stoichiometry Calculation: Application on Triassic Muschelkalk- Lettenkohle Carbonates (French Jura)

Contact Info

Product

Resources

About