Paleoenvironmental change during the Late Ordovician and Early Silurian time
| Project/Area Number |
25400495
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Stratigraphy/Paleontology
|
|---|
| Research Institution | University of Tsukuba |
|---|
Principal Investigator |
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
MARUOKA Teruyuki 筑波大学, 生命環境系, 准教授 (80400646)
SASHIDA Katsuo 筑波大学, 生命環境系, 教授 (60134201)
|
|---|
| Project Period (FY) |
2013-04-01 – 2016-03-31
|
| Project Status |
Completed (Fiscal Year 2015)
|
| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
|
|---|
| Keywords | 生層序 / 炭素同位体 / 硫黄同位体 / 古環境 / オルドビス紀 / 地球化学 / 岩相層序 / 地球化学的分析 / シルル紀 / マレーシア / コノドント / 筆石 / 同位体 |
|---|
| Outline of Final Research Achievements |
This study reconstructs an environmental change during the latest Ordovician to earliest Silurian time, when a mass extinction occurred, based on the paleontological, sedimentological, and geochemical analyses. The end-Ordovician global cooling is widely accepted as being the cause of the extinction. The sedimentological study and the carbon isotopic analysis show that this study area also went through a cooling and regression events in the Late Ordovician. The carbon/sulfur ratio reveals that recovery of the environment took a relatively long time and that the climate was gradually getting warm with a cyclic alternation of warm and cool periods throughout the Early Silurian. The sedimentological and micropaleontological data also support this conclusion.
|
Report
(4 results)
Research Products
(32 results)
-
-
[Journal Article] Sulphur geodynamic cycle2015
Author(s)
Kagoshima, T., Sano, Y., Takahata, N., Maruoka, T., Fishcer, T.P. and Hattori, K.
-
Journal Title
Scientific Reports
Volume: 5
Issue: 1
Pages: 8330-8330
DOI
Related Report
Peer Reviewed / Open Access / Acknowledgement Compliant
-
-
-
-
-
-
-
-
-
[Journal Article] Redox conditions in the atmosphere and shallow marine environments during the first Huronian deglaciation: Insights from Os isotopes and redox-sensitive elements2013
Author(s)
Goto, K. T., Y. Sekine, K. Suzuki, E. Tajika, R. Senda, T. Nozaki, R. Tada, K. Goto, S. Yamamoto, T. Maruoka, N. Ohkouchi, N. O. Ogawa
-
Journal Title
Earth and Planetary Science Letters
Volume: 376
Pages: 145-154
DOI
Related Report
Peer Reviewed
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
