Post-Carboniferous stratigraphy, northeastern Alaska

Detterman, Robert L.; Reiser, H.N.; Brosge, W.P.; Dutro, J. Thomas

doi:10.3133/pp886

Cited by 64 publications

(73 citation statements)

References 23 publications

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“…Mississippian and younger rocks in the northeastern Brooks Range are part of a parautochthonous succession ( fig. 2) similar to that found in the subsurface (Brosgé et al, 1962;Moore et al, 1994 tact with the underlying Ledge Sandstone Member, and facies stacking patterns (Detterman et al, 1975;McMillen and Colvin, 1987). The Fire Creek Siltstone is Smithian (Early Triassic) in age and the Shublik Formation ranges in age from Anisian or Ladinian through the Norian stage of the Triassic (Detterman et al, 1975 …”

Section: Northeastern Brooks Rangesupporting

confidence: 54%

“…The Shublik Formation conformably overlies the Fire Creek Siltstone (figs. 2, 3; Detterman et al, 1975). …”

Section: Regional Geologymentioning

confidence: 99%

“…Hubbard et al, 1987). Period boundary ages from Gradstein and Ogg (2004) Detterman et al, 1975;Mull et al, 1982;Bodnar, 1984;Parrish et al, 2001a, b Moore et al, 1994). A pre-Upper Permian unconformity separates the Lisburne Group and the Echooka Formation; the latter records Permian transgression with deposition of fluvial conglomerates, that infilled subaerial paleovalleys, grading upward into marine facies (Crowder, 1990).…”

Section: Regional Geologymentioning

confidence: 99%

“…It grades into phosphatic siltstone and fine sandstone of the lower Shublik Formation ( fig. 3-6; Detterman et al, 1975;Crowder, 1990). The Karen Creek Sandstone, considered a distal equivalent of the Sag River Sandstone, conformably overlies the Shublik Formation (figs.…”

mentioning

confidence: 99%

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Sequence stratigraphy and geochemistry of the upper Lower through Upper Triassic of Northern Alaska: Implications for paleoredox history, source rock accumulation, and paleoceanography

Kelly¹,

Whalen²,

McRoberts³

et al. 2007

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Section: Northeastern Brooks Rangesupporting

confidence: 54%

“…The Shublik Formation conformably overlies the Fire Creek Siltstone (figs. 2, 3; Detterman et al, 1975). …”

Section: Regional Geologymentioning

confidence: 99%

Section: Regional Geologymentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Sequence stratigraphy and geochemistry of the upper Lower through Upper Triassic of Northern Alaska: Implications for paleoredox history, source rock accumulation, and paleoceanography

Kelly¹,

Whalen²,

McRoberts³

et al. 2007

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“…missing Detterman et al, 1975;Dutro and Silberling, 1988;Crowder, 1990;Moore et al, 1994; Thorsteinsson, 1974;Nassichuk and Wilde, 1977;Beauchamp, 1993Beauchamp, , 1994Beauchamp and Henderson, 1994;Beauchamp and Desrochers, 1997 8. Sverdrup Basin, northern margin chloroforam, Nansen, Raanes bryonoderm, Great Bear Cape bryonoderm, Degerbols bryonoderm hyalosponge, unnamed unit Thorsteinsson, 1974;Davies and Nassichuk, 1991;Beauchamp, 1993Beauchamp, , 1994Beauchamp et al, 1995a,b;Beauchamp and Henderson, 1994;Beauchamp and Desrochers, 1997 9.…”

Section: Expansion Of Pce: Guadalupianmentioning

confidence: 99%

Growth and demise of Permian biogenic chert along northwest Pangea: evidence for end-Permian collapse of thermohaline circulation

Beauchamp

Baud

2002

Palaeogeography, Palaeoclimatology, Palaeoecology

272

132

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The Permian Chert Event (PCE) was a 30 Ma long episode of unusual chert accumulation along the northwest margin of Pangea, and possibly worldwide. The onset of the PCE occurred at about the Sakmarian^Artinskian boundary in the Sverdrup Basin, Canadian Arctic, where it coincides with a maximum flooding event, the ending of high-frequency/high-amplitude shelf cyclicity, the onset of massive biogenic chert deposition in deep-water distal areas, and a long-term shift from warm-to cool-water carbonate sedimentation in shallow-water proximal areas. A similar and coeval shift is observed from the Barents Sea to the northwestern USA. A landward and southward expansion of silica factories occurred during the Middle and Late Permian at which time warm-water carbonate producers disappeared completely from the northwest margin of Pangea. Biotically impoverished and increasingly narrow cold-water carbonate factories (characterised by non-cemented bioclasts of sponges, bryozoans, echinoderms and brachiopods) were then progressively replaced by silica factories. By Late Permian time, little carbonate sediments accumulated in the Barents Sea and in the Sverdrup Basin, where the deep-to shallow-water sedimentary spectrum was occupied by siliceous sponge spicules. By that time, biogenic silica sedimentation was common throughout the world. Silica factories collapsed in the Late Permian, abruptly bringing the PCE to an end. In northwest Pangea, the end-Permian collapse of the PCE was associated with a major transgression and with a return to much warmer oceanic and continental climatic conditions. Chert deposition resumed in the distal oceanic areas during the early Middle Triassic (Anisian) after a 8^10 Ma interruption (Early Triassic Chert Gap). The conditions necessary for the onset, expansion and zenith of the PCE were provided by the thermohaline circulation of nutrient-rich cold waters along the northwestern and western margin of Pangea, and possibly throughout the world oceans. These conditions provided an efficient transportation mechanism that constantly replenished the supply of silica in the area, created a nutrient-and oxygen-rich environment favouring siliceous biogenic productivity, established cold sea-floor conditions, hindering silica dissolution, while increasing calcium carbonate solubility, and provided conditions adverse to organic and inorganic carbonate production. The northwest margin of Pangea was, for nearly 30 Ma, bathed by cold waters presumably derived from the seasonal melting of northern sea ice, the assumed engine for thermohaline circulation.This process started near the Sakmarian^Artinskian boundary, intensified throughout Middle and Late Permian time and ceased suddenly in latest Permian time. It led to oceanic conditions much colder than normally expected from the palaeolatitudes, and the influence of cold northerly-derived water was felt as far south southern Nevada. The demise of silica factories was caused by the rapid breakdown of these conditions and the establishment of a much warm...

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Phanerozoic Large Igneous Province, Petroleum System, and Source Rock Links

Bergman¹,

Eldrett

Minisini

2021

Geophysical Monograph Series

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This chapter summarizes geochronologic and other data for major Phanerozoic Large Igneous Provinces (LIPs), Oceanic Anoxic Events (OAEs) and organic-rich petroleum source rocks. It also evaluates the models that support or refute genetic links between the three groups. The evidence appears to favor genetic links between the three groups, however, additional high precision age and geochemical data are needed to validate several events. Furthermore, the chapter provides insights into the importance of LIPs in hydrocarbon exploration.

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Post-Carboniferous stratigraphy, northeastern Alaska

Cited by 64 publications

References 23 publications

Sequence stratigraphy and geochemistry of the upper Lower through Upper Triassic of Northern Alaska: Implications for paleoredox history, source rock accumulation, and paleoceanography

Sequence stratigraphy and geochemistry of the upper Lower through Upper Triassic of Northern Alaska: Implications for paleoredox history, source rock accumulation, and paleoceanography

Growth and demise of Permian biogenic chert along northwest Pangea: evidence for end-Permian collapse of thermohaline circulation

Phanerozoic Large Igneous Province, Petroleum System, and Source Rock Links

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