Strontium isotopic ages of the Torinosu-type limestones (latest Jurassic to earliest Cretaceous, Japan): Implication for biocalcification event in northwestern Palaeo-Pacific

Kakizaki, Yoshihiro; Ishikawa, Tsuyoshi; Nagaishi, Kazuya; Tanimizu, Masaharu; Hasegawa, Takashi; Kano, Akihiro

doi:10.1016/j.jseaes.2011.11.018

Cited by 11 publications

(20 citation statements)

References 43 publications

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“…That of the Torinosu limestone at the type locality is from latest Kimmeridgian to latest Berriasian (Kakizaki et al, 2012). These estimated depositional periods are well concordant with those based on calcareous nannofossils from latest Jurassic to early Berriasian (Aita and Okada, 1986) and benthic foraminifers from Tithonian to Berriasian (Kobayashi and Vuks, 2006).…”

Section: Introductionsupporting

confidence: 77%

“…The strontium isotopic age of the Torinosu-type limestones corresponds to the middle Tithonian and late Kimmeridgian to early Berriasian (Kakizaki et al, 2012). That of the Torinosu limestone at the type locality is from latest Kimmeridgian to latest Berriasian (Kakizaki et al, 2012).…”

Section: Introductionmentioning

confidence: 91%

“…The former limestone from the Ebirase Formation is comparable to the limestone exposed at Shiraki in this paper. These Middle and early Late Jurassic ages of the Torinosu-type limestones assigned by Sashida et al (1989), K. Ishida (1994), and N. Ishida (2006Ishida ( , 2011 should be re-inspected using other methods, such as the strontium isotope stratigraphy of the limestones Kakizaki et al 2012), because no pre-Kimmeridgian foraminiferal elements are recognized in them as mentioned above.…”

Section: Calibration Of the Torinosu-type Limestonementioning

confidence: 99%

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西南日本の鳥巣型石灰岩ブロックのジュラ紀最後期から白亜紀古世前期有孔虫化石：鳥巣型石灰岩年代決定に関わる制約要素

Kobayashi

Wernli

2013

Jour. Geol. Soc. Japan

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Thirty-six taxa of foraminifers were recognized from samples of the Torinosu-type limestone blocks in South of Yatsushiro, Azamui (Kyushu), Nomura (Shikoku), and Yura (Kii) areas, Southwest Japan. Those identified in species level are confined to five: Nautiloculina broennimanni, Freixialina planispiralis, Charentia cuvillieri, Melathrokerion spirialis, and Pseudocyclammina lituus. Such genera as Kurnubia and Alveosepta showing the pre-Kimmeridgian, and orbitolinids characteristic in the post-late Hauterivian are completely absent in them. The Torinosu-type limestones studied are assigned to the latest Jurassic to earlier Early Cretaceous based on the biostratigraphic distribution of the identified five species in the western Tethyan region and chronologic constraints on the studied material excluding the pre-Kimmeridgian and post-late Hauterivian faunal elements.

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Section: Introductionsupporting

confidence: 77%

Section: Introductionmentioning

confidence: 91%

Section: Calibration Of the Torinosu-type Limestonementioning

confidence: 99%

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西南日本の鳥巣型石灰岩ブロックのジュラ紀最後期から白亜紀古世前期有孔虫化石：鳥巣型石灰岩年代決定に関わる制約要素

Kobayashi

Wernli

2013

Jour. Geol. Soc. Japan

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“…The age interval of the Nakanosawa section has been relatively well established as 150.6–149.2 Ma, by the Sr isotope ages of the uppermost horizon (see Kakizaki et al . ), and from ammonoids reported from the underlaying sandstone (Kimmeridgian to Tithonian; Sato ; Sato & Taketani ).…”

Section: Study Sectionsmentioning

confidence: 99%

“…; Kakizaki et al . ). The Sr isotope ratio of a carbonate rock has been considered to reflect the seawater value of the depositional age (e.g.…”

Section: Introductionmentioning

confidence: 97%

Carbon isotope stratigraphy of Torinosu‐type limestone in the western Paleo‐Pacific and its implication to paleoceanography in the Late Jurassic and earliest Cretaceous

Kakizaki

Kano

2013

Island Arc

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Carbon isotope stratigraphy of the Late Jurassic and earliest Cretaceous was revealed from Torinosu‐type limestone, which was deposited in a shallow‐marine setting in the western Paleo‐Pacific, in Japan. Two sections were examined; the Nakanosawa section of the late Kimmeridgian to early Tithonian age (Fukushima Prefecture, Northeast Japan), and the Furuichi section of the late Kimmeridgian to early Berriasian age (Ehime Prefecture, Southwest Japan). The age‐model was established using Sr isotope ratio and fossil occurrence. The limestone samples have a low Mn/Sr ratio (mostly <0.5) and lack a distinct correlation between δ13C and δ18O, indicating a low degree of diagenetic alteration. Our composite δ13C profile from the two limestone sections shows three stratigraphic correlation points that can be correlated with the profiles of relevant ages from the Alpine Tethyan region: a large‐amplitude fluctuation (the lower upper Kimmeridgian, ∼152 Ma), a positive anomaly (above the Kimmeridgian/Tithonian boundary, ∼150 Ma), and a negative anomaly (the upper lower Tithonian, ∼148 Ma). In addition, we found that δ13C values of the Torinosu‐type limestone are ∼1‰ lower than the Tethyan values in the late Kimmeridgian. This inter‐regional difference in δ13C values is likely to have resulted from a higher productivity and/or an organic burial in the Tethyan region. The difference gradually reduces and disappears in the late Tithonian, where the Tethyan and our δ13C records show similar stable values of 1.5–2.0‰. This isotopic homogenization is probably due to changes in the continental distribution and the global ocean circulation, which propagated the 13C‐depleted signature from the larger Paleo‐Pacific to the smaller Tethys Ocean during this time.

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