東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back to Search results for [ null ]

Switch To: Labeled | MARC Mode | ISBD

A Cenozoic history of the central Ar...

O'Regan, Matthew Aaron.

Linked to FindBook

Google Book

Amazon

博客來

A Cenozoic history of the central Arctic Ocean.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	A Cenozoic history of the central Arctic Ocean./
Author:	O'Regan, Matthew Aaron.
Description:	228 p.
Notes:	Source: Dissertation Abstracts International, Volume: 68-08, Section: B, page: 5086.
Contained By:	Dissertation Abstracts International68-08B.
Subject:	Geology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3277002
ISBN:	9780549191438

A Cenozoic history of the central Arctic Ocean.
O'Regan, Matthew Aaron.

A Cenozoic history of the central Arctic Ocean. - 228 p.

Source: Dissertation Abstracts International, Volume: 68-08, Section: B, page: 5086.

Thesis (Ph.D.)--University of Rhode Island, 2007.

This dissertation comprises a series of studies that use sedimentary records combined with regional geophysics to explore and expand our understanding of the central Arctic Ocean throughout the Cenozoic. Recovered from the Lomonosov Ridge during the Integrated Ocean Drilling Program Expedition 302 (Arctic Coring Expedition; ACEX), the sediment cores provide the only long term marine geologic record from the central Arctic Ocean and offer the first means for integrating and reinterpreting over 30 years of predominantly geophysical data collection.

ISBN: 9780549191438Subjects--Topical Terms:

516570
Geology.

A Cenozoic history of the central Arctic Ocean.
LDR:03290nam 2200313 4500 001 1404399
005 20111205104743.5
008 130515s2007 ||||||||||||||||| ||eng d
020 $a 9780549191438
035 $a (UMI)AAI3277002
035 $a AAI3277002
040 $a UMI $c UMI
100 1 $a O'Regan, Matthew Aaron. $3 1683717
245 1 2 $a A Cenozoic history of the central Arctic Ocean.
300 $a 228 p.
500 $a Source: Dissertation Abstracts International, Volume: 68-08, Section: B, page: 5086.
500 $a Adviser: Kate Moran.
502 $a Thesis (Ph.D.)--University of Rhode Island, 2007.
520 $a This dissertation comprises a series of studies that use sedimentary records combined with regional geophysics to explore and expand our understanding of the central Arctic Ocean throughout the Cenozoic. Recovered from the Lomonosov Ridge during the Integrated Ocean Drilling Program Expedition 302 (Arctic Coring Expedition; ACEX), the sediment cores provide the only long term marine geologic record from the central Arctic Ocean and offer the first means for integrating and reinterpreting over 30 years of predominantly geophysical data collection.
520 $a Results from a stress history analysis reveal that there is no evidence for largescale erosional events in the sediments from the Lomonosov Ridge. This implies that the transition from the Paleogene to Neogene, represented by a 25 million year (Myr) hiatus in the ACEX record, is a period of low to non-deposition, indicating a dynamic environment in which no large sedimentary deposits accumulated. Although regional seismic evidence suggests the grounding of massive icebergs or ice sheets during the Pleistocene, the lack of overconsolidated sediments argues against grounding at the drilling sites on the Lomonosov Ridge.
520 $a Longstanding controversy over Quaternary sedimentation rates in the central Arctic Ocean arises from the unusual paleomagnetic inclination records from these sediments. By integrating the ACEX record with existing sediment cores proximal to the drill sites, it is shown that although they can be broadly correlated, the position and duration of excursions are not constrained stratigraphically. Petrophysical and environmental magnetic records that track primary glacial and interglacial depositional signals are identified and provide a means for constructing a Quaternary chronostratigraphy for central Arctic Ocean sediments.
520 $a Simple subsidence models that describe the continued sinking of the Lomonosov Ridge since the late Paleocene rifting from the Barents-Kara Sea margin do not adequately account for the paleoenvironmental indicators seen bounding the 25 Myr mid-Cenozoic hiatus in the ALEX record. Variations in heat flow along strike of the Lomonosov Ridge and regional seismic data both suggest a more complicated geodynamic Cenozoic evolution for the Ridge. A period of tectonically induced uplift of the Lomonosov Ridge is argued as a possible mechanism to account for these diverse observations.
590 $a School code: 0186.
650 4 $a Geology. $3 516570
650 4 $a Physical Oceanography. $3 1019163
690 $a 0372
690 $a 0415
710 2 $a University of Rhode Island. $3 1022014
773 0 $t Dissertation Abstracts International $g 68-08B.
790 1 0 $a Moran, Kate, $e advisor
790 $a 0186
791 $a Ph.D.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3277002