Sr isotope variation of Permian seawater
| Project/Area Number |
25400490
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Geology
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| Research Institution | Kumamoto University |
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Principal Investigator |
Kani Tomomi 熊本大学, 自然科学研究科, 助教 (60332863)
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| Co-Investigator(Renkei-kenkyūsha) |
ISOZAKI Yukio 東京大学, 総合文化研究科, 教授 (90144914)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Keywords | ペルム紀 / ストロンチウム同位体 / 古海洋 / 大量絶滅 / 石灰岩 / 海洋 / 炭酸塩 / 炭酸塩岩 |
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| Outline of Final Research Achievements |
The Permian minimum as the Phanerozoic lowest value of seawater Sr isotope ratio by and large contemporaneous with the major mass extinction around Middle/Late Permian boundary. We newly reported the continuous Sr isotope record with detailed biostratigraphic data for the Guadalupian (Middle Permian) carbonates deposited at mid-paleolatitude region. Previous geochemical studies are carried out for around low-latitudes because well-reserved strata deposited at particularly middle/high paleolatitude region are limited. The Sr isotope profile of carbonates obtained in this study clarified that the Permian minimum (ca. 5 m.y.-long) had began sometime in Guadalupian Wordian and the collapsed age of a mid-latitude reef is Guadalupian Capitanian. The Permian minimum could be caused by global cooling because the proportion of glacier-covered area regulate erosion/weathering rate of time-integrated highly radiogenic continental silicate. The mass extinction event may arise from the cooling.
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Report
(4 results)
Research Products
(13 results)
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[Presentation] A REMARKABLE SEA-LEVEL DROP ACROSS THE GUADALUPIAN-LOPINGIAN BOUNDARY (PERMIAN) IN THE LOW-LATITUDES: UNIQUE HIATUS DETECTED ON A MID-PANTHALASSAN PALEO-ATOLL COMPLEX2013
Author(s)
KOFUKUDA, Daisuke, ISOZAKI, Yukio, KANI, Tomomi, HISANABE, Chihiro, ISHIMURA, Toyoho,
Organizer
2013 GSA Annual Meeting
Place of Presentation
米国デンバー
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