Pole to equator temperature gradient for coniacian time, late cretaceous: Oxygen and carbon isotopic data on the Koryak upland and Hokkaido

Zakharov, Yuri D.; Smyshlyaeva, Olga P.; Popov, A. M.; Velivetskaya, T. A.; Afanasyeva, Tamara B.; Tanabe, Kazushige; Shigeta, Yasuteru; Maeda, Haruyoshi

doi:10.1007/s12583-012-0230-0

Cited by 5 publications

(10 citation statements)

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“…) and as localized riverine input (Zakharov et al . ), because both are large‐scale phenomena and should have also affected the δ 13 C and δ 18 O values of the ‘background’ fauna. Therefore, it is likely that the aberrant δ 13 C and δ 18 O values of the Sphenoceramus spp.…”

Section: Discussionmentioning

confidence: 99%

“…A similar temperature range (14–25°C) was reconstructed by Zakharov et al . () based on the δ 18 O values of ammonite and bivalve shells from stratigraphically older (Coniacian) strata in the Haboro area, about 40 km SSW from the study area. Such estimates are in general agreement with the Campanian seawater temperature reconstructed from biogenic carbonates from the Pacific Ocean.…”

Section: Geological Settingmentioning

confidence: 99%

“…; Henderson & Price ; Zakharov et al . ). Remarkably, inoceramids exhibit such stable isotope pattern when found embedded in 13 C‐depleted carbonate concretions with high amounts of microcrystalline pyrite (Tourtelot & Rye ; Whittaker et al .…”

mentioning

confidence: 97%

“…; Henderson & Price ; Zakharov et al . ). Such concretions are diagnostic features for bacterially mediated anoxic oxidation of methane (AOM) and are often associated with ancient cold seeps (Aharon & Fu ; Peckmann & Thiel ; Angeletti et al .…”

mentioning

confidence: 97%

“…) and local freshening (Zakharov et al . ) as well as vital effects (Tourtelot & Rye ; Morrison & Brand ) related to a planktonic lifestyle (see Discussion; MacLeod & Hoppe ), kinetic disequilibrium effects (Henderson & Price ) and preferential shell growth during summer months (Henderson & Price ). These studies, however, were based on δ 13 C and δ 18 O data from bulk shell analyses, which cannot be used to reconstruct environmental processes on short time‐scales (seasonal to interannual).…”

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confidence: 98%

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Sclerochronological study of the gigantic inoceramids Sphenoceramus schmidti and S. sachalinensis from Hokkaido, northern Japan

Walliser

Tanabe

Hikida

et al. 2019

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Here, we present the first sclerochronological investigation of shells of the gigantic inoceramids Sphenoceramus schmidti and S. sachalinensis from the middle Campanian cold seep carbonate‐bearing strata of the Yezo Basin in Hokkaido (northern Japan). Stable carbon (δ13C) and oxygen (δ18O) isotope values were measured in the aragonitic and calcitic shell layers of both species and compared to those of other co‐occurring benthic (mainly bivalves and gastropods) and demersal molluscs (ammonites). Sedimentological and stable isotope data suggest that these bivalves lived near cold seeps and were exposed to high H2S level in the seawater. The inoceramid shells exhibited higher δ13C and lower δ18O values than the coeval non‐cold seep molluscs. We ascribed the anomalous isotopic pattern to a combination of vital and environmental effects determined by the hosting of chemosymbionts and the exposure to warm interstitial waters. Inoceramid δ13C minima coincided with growth lines and likely reflect changes in nutrient supply by the chemosymbionts. Absolute temperatures estimated from δ18O values of Sphenoceramus schmidti and S. sachalinensis were, on average, ca. 4–5°C warmer than those reconstructed for the non‐seepage environment (19.3 ± 0.7°C). Short‐term δ18O fluctuations of the inoceramid material indicate local temperature ranges of up to 5.2°C, that is four times larger than those reconstructed from the benthic and demersal fauna (1.3°C). In general, our data suggest that the stable carbon and oxygen isotope values of the studied Sphenoceramus spp. were strongly affected by short‐term fluctuations in seepage activity and do not reflect seasonal fluctuations.

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Section: Discussionmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

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confidence: 97%

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confidence: 97%