Reinvestigation of age model for relative paleointensity stack and application to Lake Baikal record

Author(s): Oda, H.
Author Affiliation(s): Primary:
Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan
Volume Title: AGU 2014 fall meeting
Source: American Geophysical Union Fall Meeting, Vol.2014; American Geophysical Union 2014 fall meeting, San Francisco, CA, Dec. 15-19, 2014. Publisher: American Geophysical Union, Washington, DC, United States
Note: In English
Summary: The age model for relative paleointensity stack PISO-1500 (Channell et al., 2009) is based on IODP U1308 from North Atlantic. Channell et al. (2008) developed the age model for U1308 by correlating the benthic oxygen isotope curve with LR04 oxygen isotope stack (Lisiecki&Raymo, 2005). LR04 stack is known as oxygen isotope stack for benthic foraminifarra, whose age model is dependent on ice volume model with a certain time lag. On the other hand, Caballero-Gill et al. (2012) developed an absolute age model based on U-Th dating for stalagmites from China and correlated the oxygen isotope curve with that on planctonic foraminiferra for a deep-sea core from South China Sea. The age model based on absolute dating for stalagmite was then transfered to oxygen isotope curve of benthic forraminiferra for the same core. This enables to provide absolute age model on PISO-1500 for the past 350 kyrs. The resulting modified PISO-1500 was applied on paleomagnetic records from Lake Baikal to provide an age model based on relative paleointensity. Finally, this age model was compared with alternative age model based on correlation of biogenic silica record with insolation at the site (Prokopenko et al., 2006) and the reason for the discrepancy will be discussed.
Year of Publication: 2014
Research Program: IODP Integrated Ocean Drilling Program
Key Words: 06 Petrology, Sedimentary; Asia; Atlantic Ocean; Commonwealth of Independent States; Expedition 303; Expeditions 303/306; IODP Site U1308; Integrated Ocean Drilling Program; Lacustrine environment; Lake Baikal; Lake sediments; Magnetic intensity; Marine sediments; Mid-Atlantic Ridge; North Atlantic; Northeast Atlantic; Paleomagnetism; Russian Federation; Sediments
Coordinates: N495300 N495300 W0241400 W0241400
Record ID: 2015087635
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