Large-scale fluid flow in the Middle Devonian Presqu'ile barrier, Western Canada Sedimentary Basin

Oing, Hairuo; Mountjoy, Eric W.

doi:10.1130/0091-7613(1992)020<0903:lsffit>2.3.co;2

Cited by 95 publications

(43 citation statements)

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“…The diagenesis such as mechanical compaction, intergranular pressure solution, cementation (Heydari, 2000), thermochemical sulfate reduction Zhu et al, 2006;Hill, 1995), dissolution produced by corrosive diagenetic fluids of diverse nature (Davies et al, 2006;Sattler et al, 2004;Cheng et al, 2002;Morad et al, 2000;Huang and Song, 1997;Qing and Mountjoy, 1992;Giles and Marshall, 1986), burial dolomitization (Esteban and Taberner, 2003;Lee and Friedman, 1987) and tectonic hydrothermal dolomitization (Davies et al, 2006) during the deep burial condition, can modify the secondary vug created during subaerial karstification and develop new secondary vugs as well. It is disputable that the ultimate vug of these carbonates is determined by subaerial karstification or deep burial diagenesis (Heydari, 2003;Dickson and Saller, 1995).…”

Section: Introductionmentioning

confidence: 96%

Characteristics of subaerial karstification and late reconstruction in the Dengying Formation, Sichuan basin, southwestern China

Wang

Liu

et al. 2010

J. Earth Sci.

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Tectonic uplift at the end of Sinian resulted in the denudation of the Dengying (灯影) Formation on a different scale and the development of a great number of secondary dissolution vugs beneath the unconformity between Sinian and Cambrian. Geological and geochemical characteristics such as the development of caves, sinkholes, karst tubes and weathering crust, abrupt depletion and negative deflection of δ 13 C and δ 18 O in country rock and vug filling toward unconformity surface suggest that subaerial karstification is responsible for the development of secondary karst vugs within 150 m or so beneath the unconformity surface. This kind of secondary dissolution vug was partially or completely filled by different stage dolomite, calcite, quartz and bitumen during the later deep burial and uplift. Facts such as the obvious difference in δ 13 C and δ 18 O of the filling in the subaerial karst vug from the country rock and the value of δ 13 C and δ 18 O of the filling increasing or decreasing with that of the country rocks, suggest that the hydrothermal fluid charged in vugs is allogenic fluid. Subaerial karstification vug acted as a conduit for allogenic corrosive fluid which can create new secondary vugs and enlarge previous karst vugs. corrosive fluid introduction and petroleum thermal cracking, caused contraction or enlargement of the subaerial karstification vugs and the development of new secondary vugs during the deep burial and uplift. The ultimate vug of deep burial dolomitite is determined not only by fluid charge, dissolution, mineral precipitant, and petroleum thermal cracking during the deep burial and tectonic uplift, but also by Characteristics of Subaerial Karstification and Late Reconstruction in the Dengying Formation, Sichuan Basin 291 the amount of initial secondary dissolution vugs created by subaerial karstification.

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Section: Introductionmentioning

confidence: 96%

Characteristics of subaerial karstification and late reconstruction in the Dengying Formation, Sichuan basin, southwestern China

Wang

Liu

et al. 2010

J. Earth Sci.

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“…Subsequently, the heated meteoric water underwent upward migration, leading to the precipitation of hydrothermal calcite. This model of water flow was previously proposed by Qing and Mountjoy [60] to explain the variation of homogenization temperatures as well as the 87 Sr/ 86 Sr and 18 O values from saddle dolomite cement from the west towards the east in the Western Canada sedimentary basin as a result of tectonic thrusting and compression, sedimentary loading, and tectonic uplift on the western margin. The structural history of the Western Canada basin is broadly analogous to that of the Tahe area.…”

Section: Stable Isotopes and Fluid Inclusion Constraints On Fluidsmentioning

confidence: 63%

Multiphase Calcite Cementation and Fluids Evolution of a Deeply Buried Carbonate Reservoir in the Upper Ordovician Lianglitag Formation, Tahe Oilfield, Tarim Basin, NW China

et al. 2017

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Oil and gas have been found in the Upper Ordovician Lianglitag Formation carbonates in the Tahe Oilfield, Tarim Basin, NW China. This study documents the origin of diagenetic fluids by using a combination of petrology, SIMS, fluid inclusion, and radiogenic isotope analysis. Six stages of calcite cements were revealed. C1-C2 formed in marine to early burial environments. C3 has relatively low 18 O VPDB values (−8.45‰ to −6.50‰) and likely has a meteoric origin. Meteoric water probably fluxed into aquifers during the Early Paleozoic and Late Paleozoic uplift. C4 has 18 O VPDB values typically 3‰ higher than those of C3, and probably formed during shallow burial. C5 displays relatively negative 18 O VPDB values (−8.26‰ to −5.12‰), and the moderate-tohigh fluid-inclusion temperatures imply that it precipitated in burial environments. C6 shows homogenization temperatures (up to 200 ∘ C) higher than the maximum burial and much lower salinities (<10.61 wt% NaCl), which may suggest that the fluid was deeply recycled meteoric water. The average 87 Sr/ 86 Sr ratios of fracture-and vug-filling calcite cements are much higher, indicative of incorporation of radiogenic Sr. Caves and fractures constitute the dominant reservoir spaces. A corresponding diagenesis-related reservoir evolution model was established that favors exploration and prediction.

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“…A törések által meghatározott dolomitosodás rendszerint Mg-ban gazdag, repedés mentén felfelé áramló, hidrotermális, azaz környezeténél melegebb oldatokhoz köthető (DAVIES & SMITH 2006, QING & MOUNTJOY 1992. ábra.…”

Section: áBra (A) Lencsés-lemezes Elrendeződésű Finom-és Középkristunclassified

Részlegesen dolomitosodott alsó-jura mészkő a tatai Kálvária-dombon

et al. 2018

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BevezetésA Gerecse hegységtől nyugatra fekvő Kálvária-dombot mezozoikumi kőzetek építik fel (1. ábra). A rétegsor a késő-triász végén belső karbonátplatformon képződött mész kő -vel (Dachsteini Mészkő) indul. A platformnak a triász-jura határon történt megfulladását követően viszonylag sekély, de nyílt tengerben halványvörös mészkő (Pisznicei Mészkő) lerakódása kezdődött el a késő-hettangiban, amit crinoideás mészkő lerakódása követett a pliensbachi idején. A koraDolomittest a tatai Kálvária-domb alsó-jura mészkövében 148/1, 27-34., Budapest, 2018 The dolomite body in the Lower Jurassic limestone of the Kálvária Hill, Tata AbstractA few metres-sized dolomite body is present in the Lower Jurassic limestone strata of the Kálvária Hill of the Gerecse Mts. The dolomite making up this body is unique, both in the outcrop itself and in the Jurassic beds of the Gerecse Mts. It is laminated, yellow-red and follows a fracture, thus further invading the host Jurassic limestone along a bedding plane. The dolomite that effectively replaces the host rock is fine to medium crystalline; locally, saddle dolomite crystals have also been observed. A breccia zone cuts across the dolomite body, although brecciation is not evident within the dolomite and only calcite veins are present. The breccia zone is cemented by white-grey-yellow calcite that incorporates dolomite crystal fragments. Calcitized dolomite crystals can be found in the host Jurassic limestone next to the breccia zone. The three different dolomite types are most probably associated with the same dolomitization event. Dolomitizing fluids could have migrated through fractures and occasionally along bedding planes. Dolomite crystal fragments -found within zones of the breccia-cementing calcites -could have their origins in the dolomitized host rock. The stable isotope data of the dolomite suggest that dolomitization probably took place in the burial realm, either from the existing pore water or hydrothermal fluids; the latter would have migrated through fractures in the lithified Lower Jurassic limestone. The post-sedimentary character of the fractures suggests a post-Late Jurassic age for the dolomitization. The meteoric origin of the calcite found in fractures -and as cement in the breccia zone -points to subaerial exposure. This would imply the occurrence of a pre-Late Cretaceous-Palaeogene dolomitization event.Keywords: Dolomite, stable isotopes, Lower Jurassic, Tata, Kálvária Hill, Transdanubian Range Összefoglalás A tatai Kálvária-dombon feltáruló alsó-jura mészkőben korábban nem azonosított dolomittestet ismertünk fel. A dolomittest egy repedés mentén jelenik meg és egy szintben a Pisznicei Mészkő réteglapjával párhuzamosan is kiterjed, így "gomba"alakú metszetet mutat. A dolomit finom-középkristályos, és helyenként nyeregdolomit is megjelenik. A dolomittestet breccsazóna harántolja. A klasztokat több generációs fehér-szürke-sárga kalcit cementálja, amelyben zárványként apró dolomittörmelék is megfigyelhető. A dolomittest nem breccsásodott, hanem rétegződéssel ...

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Large-scale fluid flow in the Middle Devonian Presqu'ile barrier, Western Canada Sedimentary Basin

Cited by 95 publications

References 0 publications

Characteristics of subaerial karstification and late reconstruction in the Dengying Formation, Sichuan basin, southwestern China

Characteristics of subaerial karstification and late reconstruction in the Dengying Formation, Sichuan basin, southwestern China

Multiphase Calcite Cementation and Fluids Evolution of a Deeply Buried Carbonate Reservoir in the Upper Ordovician Lianglitag Formation, Tahe Oilfield, Tarim Basin, NW China

Részlegesen dolomitosodott alsó-jura mészkő a tatai Kálvária-dombon

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