DOI: 10.5194/cp-8-79-2012
Scopus记录号: 2-s2.0-84855765066
论文题名: Technical note: Late Pliocene age control and composite depths at ODP Site 982, revisited
作者: Khélifi N. ; Sarnthein M. ; Naafs B.D.A.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2012
卷: 8, 期: 1 起始页码: 79
结束页码: 87
语种: 英语
Scopus关键词: age determination
; benthos
; biostratigraphy
; composite
; glaciation
; magnetostratigraphy
; Northern Hemisphere
; Ocean Drilling Program
; oxygen isotope
; paleoceanography
; paleoclimate
; Pliocene
; Quaternary
; reconstruction
; sea surface temperature
; Atlantic Ocean
; Rockall Trough
英文摘要: Ocean Drilling Program (ODP) Site 982 provided a key sediment section at Rockall Plateau for reconstructing northeast Atlantic paleoceanography and monitoring benthic δ 18O stratigraphy over the late Pliocene to Quaternary onset of major Northern Hemisphere glaciation. A renewed hole-specific inspection of magnetostratigraphic reversals and the addition of epibenthic δ 18O records for short Pliocene sections in holes 982A, B, and C, crossing core breaks in the δ 18O record published for Hole 982B, now imply a major revision of composite core depths. After tuning to the orbitally tuned reference record LR04, the new composite δ 18O record results in a hiatus, where the Kaena magnetic subchron might have been lost, and in a significant age reduction for all proxy records by 130 to 20 ky over the time span 3.2-2.7 million years ago (Ma). Our study demonstrates the general significance of reliable composite-depth scales and δ 18O stratigraphies in ODP sediment records for generating ocean-wide correlations in paleoceanography. The new concept of age control makes the late Pliocene trends in SST (sea surface temperature) and atmospheric pCO 2 at Site 982 more consistent with various paleoclimate trends published from elsewhere in the North Atlantic. © Author(s) 2012. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49624
Appears in Collections: 气候变化与战略
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Recommended Citation:
Khélifi N.,Sarnthein M.,Naafs B.D.A.. Technical note: Late Pliocene age control and composite depths at ODP Site 982, revisited[J]. Climate of the Past,2012-01-01,8(1)