2012 Fiscal Year Final Research Report
Sea-level reconstructions during the last deglaciation in the Great Barrier Reef region based on large benthic foraminiferal asssemblages
| Project/Area Number |
22740339
|
|---|
| Research Category |
Grant-in-Aid for Young Scientists (B)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
Stratigraphy/Paleontology
|
|---|
| Research Institution | University of the Ryukyus |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2010 – 2012
|
| Keywords | グレートバリアリーフ / 古水深 / 大型有孔虫 / 後氷期 / 最終氷期 / 海水準変動 |
|---|
| Research Abstract |
Paleo-sea-level changes and reef development processes before, during and after the Last Glacial Maximum (LGM) were reconstructed based on the taxonomic composition of fossil large benthic foraminiferal (LBF) assemblages from cores drilled on continental shelf slopes of the Great Barrier Reefby the IODP Expedition 325. Five LBF assemblages were delineated by multivariate analysis. Results ofstratigraphic changes of the five LBF assemblages and radiocarbon dates of fossil LBFs indicated that paleo-sea level was above -80 m before 30 kyr BP, then gradually lowered during the LGM, and the lowest at approximately -120 to -130 m in 19-20 k yr BP.
|
