Nilsson, Andreas et al. (2013): Magnetostratigraphic importance of secondary chemical remanent magnetizations carried by greigite (Fe (sub 3) S (sub 4) ) in Miocene sediments, New Jersey shelf (IODP Expedition 313)
Leg/Site/Hole:
Related Expeditions:
IODP 313
Identifier:
ID:
2013-041374
Type:
georefid
ID:
10.1130/GES00854.1
Type:
doi
Creator:
Name:
Nilsson, Andreas
Affiliation:
University of Liverpool, School of Environmental Sciences, Liverpool, United Kingdom
Role:
author
Name:
Lee, Youn Soo
Affiliation:
Korea Institute of Geosicence and Mineral Resources, South Korea
Role:
author
Name:
Snowball, Ian
Affiliation:
Uppsala University, Sweden
Role:
author
Name:
Hill, Mimi
Affiliation:
Role:
author
Identification:
Title:
Magnetostratigraphic importance of secondary chemical remanent magnetizations carried by greigite (Fe (sub 3) S (sub 4) ) in Miocene sediments, New Jersey shelf (IODP Expedition 313)
Year:
2013
Source:
Geosphere
Publisher:
Geological Society of America, Boulder, CO, United States
Volume:
9
Issue:
3
Pages:
510-520
Abstract:
Paleomagnetic and mineral magnetic analyses were carried out on Miocene clays from upper unit II at Sites M0027 and M0028 recovered during Integrated Ocean Drilling Program Expedition 313 on the New Jersey shallow shelf. A zone of mixed polarity in the lower section of Hole M0028A and dual overlapping magnetization components in upper Hole M0027A indicate that the sediments may have been chemically remagnetized during one or several events. Mineral magnetic investigations reveal that the magnetization is carried by the ferrimagnetic iron-sulfide greigite (Fe (sub 3) S (sub 4) ), possibly with traces of titanomagnetite. We find that several changes in polarity coincide with variations in magnetic mineral grain size and/or concentration. We interpret these variations as different stages of greigite growth, which were triggered by changes in pore-water chemistry and/or upward migration of methane.
Language:
English
Genre:
Serial
Rights:
URL:
Coverage: Geographic coordinates: North:39.3803 West:-73.3718 East:
-73.2950 South:39.3357
Keywords: Stratigraphy; anisotropy; Atlantic Ocean; Cenozoic; chemical remanent magnetization; continental shelf; cores; Expedition 313; greigite; Integrated Ocean Drilling Program; IODP Site M0027; IODP Site M0028; isothermal remanent magnetization; magnetic minerals; magnetic properties; magnetic susceptibility; magnetization; magnetostratigraphy; marine sediments; Miocene; Neogene; New Jersey; North Atlantic; Northwest Atlantic; paleomagnetism; remanent magnetization; sediments; sulfides; Tertiary; United States;
.