Shallow Subsurface Dolomitization of Subtidally Deposited Carbonate Sediments in the Hanson Creek Formation (Ordovician—silurian) of Central Nevada

Dunham, John B.; Olson, E.R.

doi:10.2110/pec.80.28.0139

Cited by 34 publications

(15 citation statements)

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“…Two processes can be proposed for the formation of D3: 1) a recrystallization of former dolomites (D1 and/or D2); 2) a burial dolomitization of "stabilized" lowmagnesian calcite marine carbonates (Tucker and Wright, 1990;Banner, 1995). The coarser crystals, the stoichiometry and the loss of Sr and enrichment of Fe and Mn content in D3 suggest recrystallization processes (Dunham and Olson, 1980;Tucker and Wright, 1990;Banner, 1995). In both cases, the high Na and Cl contents, compared to the D1 ones, may stem from the remobilization of these ions during the dissolution of the thick evaporite bodies located at the base and top of S3.…”

Section: 12mentioning

confidence: 99%

Nature and distribution of diagenetic phases and petrophysical properties of carbonates: The Mississippian Madison Formation (Bighorn Basin, Wyoming, USA)

Barbier

Floquet

Hamon

et al. 2015

Marine and Petroleum Geology

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Section: 12mentioning

confidence: 99%

Nature and distribution of diagenetic phases and petrophysical properties of carbonates: The Mississippian Madison Formation (Bighorn Basin, Wyoming, USA)

Barbier

Floquet

Hamon

et al. 2015

Marine and Petroleum Geology

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“…Granulometric differences between cortex and internal part of nodules are frequent in palustrine soils (Freytet, 1971). "Cloudy" dolomites present very frequent variations of crystal granulometry, as in "peritidal" dolomites (Dunham and Olson, 1980;Sear and Lucia, 1980, etc.). Such facies are interpreted as pedogenetic in Upper Triassic of Dolomite Alps (Cros and Freytet, 1985).…”

Section: Dolomitizationmentioning

confidence: 99%

The carbonates of the Permian Lakes of North Massif central, France

Freytet

Lebreton

Paquette

1992

Carbonates Evaporites

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During the Permian, large fluvio-lacustrine basins occurred within the West European Hercynian chain. The deposits were mainly detrital (conglomerates, sandstones and pelites). The two studied sites, Couy borehole and Aumance basin contain several dolomitic beds alternating with pelites containing Ostracods. The carbonate layers constitute various dolomitized facies with dolosparite, laminated and bituminous dolomites, oolites, oncolites and stromatolites, and pedological nodules. Microfacies are varied. The dolomite crystals can be either isolated rhombs scattered in pelites or rhombs and xenomorphic crystals cementing sandstones; in dolomicrites, dolomicrosparites and dolosparites, crystals are xenomorphous and very irregular in size.All the layers are interpreted as the result of the dolomitization of an initial calcitic mud. Some columnar stromatolites had their thin primary fabric well preserved by siliceous early replacement, while dolomitization poorly preserved laminations. The fluvio-lacustrine sediments associated with carbonates are red, mottled and grey. The carbonates were deposited in small lacustrine basins and in the flood plain pelites. Climate conditions were not desertic, but dry tropical with alternating wet and dry seasons allowing for a periodic hydromorphy responsible for oxido-reduction of iron, and carbonate nodulization.

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“…The publicity surrounding the discovery of primary dolomite forming in hypersaline settings (e.g., Deffeyes et al, 1964;Kinsman, 1965;Shinn et al, 1965) and the recognition of the quantitative importance of secondary dolomitization of existing limestones and carbonate sediments through reflux of mixed meteoric and hypersaline waters (e.g., Badiozamani, 1973;Dunham and Olson, 1979) tend to overshadow a third significant site of dolomite formation-the deep-sea environment. Reports of scattered rhombic crystals and detrital grains in deep-sea sediments are common (summary and references in Milliman, 1974).…”

Section: Introductionmentioning

confidence: 99%

Isotopic Survey of Diagenetic Carbonates, Deep Sea Drilling Project Leg 63

Kenneth¹,

John²

1981

Initial Reports of the Deep Sea Drilling Project

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Authigenic carbonates, principally calcium-rich dolomites, with extremely variable isotopic compositions were recovered in organic-rich marine sediments during Leg 63 drilling off southern California and Baja California. These carbonates occur as thin layers in fine-grained, diatomaceous sediments and siliceous rocks, mostly deposited during the Neogene. A combination of textural, geochemical, and isotopic evidence indicates these dolomites formed as cements and precipitates in shallow subsurface zones of high alkalinity spawned by abundant CO 2 and methane production during progressive microbial decay of organic matter. Depths and approximate temperatures of formation estimated from oxygen isotopes are 87 to 658 meters and 10°C to 50°C, respectively. Within any sedimentary section, dolomites may form simultaneously at several depths or at different times within the same interval. Highly variable carbon isotopes (-30 to + 16‰) reflect the isotopic reservoir in which the carbonates formed. Oxidation of organic matter through microbial reduction of sulfate at shallow depths favors light-carbon carbonates such as those at Sites 468 and 471; heavy-carbon carbonates at Site 467 most likely formed below this zone where HC 12 O 3~ is preferentially removed by reduction of CO 2 to methane during methanogenesis. An important controlling factor is the sedimentation rate, which dictates both the preservation of organic matter on the sea floor and depth distribution of subsurface zones of organic-matter decay.

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Shallow Subsurface Dolomitization of Subtidally Deposited Carbonate Sediments in the Hanson Creek Formation (Ordovician—silurian) of Central Nevada

Cited by 34 publications

References 0 publications

Nature and distribution of diagenetic phases and petrophysical properties of carbonates: The Mississippian Madison Formation (Bighorn Basin, Wyoming, USA)

Nature and distribution of diagenetic phases and petrophysical properties of carbonates: The Mississippian Madison Formation (Bighorn Basin, Wyoming, USA)

The carbonates of the Permian Lakes of North Massif central, France

Isotopic Survey of Diagenetic Carbonates, Deep Sea Drilling Project Leg 63

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