Zhang, Chunfu (2004): 1; An integrated paleomagnetic analysis program for stratigraphy labs and research projects; 2; Aptian-Albian carbon and oxygen isotope stratigraphy of the Ontong Java Plateau. 118 pp., georefid:2005-069925

1. This section describes the enhanced Windows-based Paleomagnetic Analysis Program written by the author for stratigraphy labs and the paleomagnetic community to quickly get the big picture of paleomagnetic feature. This program integrates on-screen visualization and analysis of paleomagnetic data and printing graphic outputs. With graphic user interface, it is easy to understand and use. It can accept flexible data file format: either fixed length or delimited data files. Each data file can contain up to 500 samples with a variable number of demagnetization steps (up to 50). The integrated toolboxes accept keyboard or copy-and-paste data input, and allow the user to calculate paleolatitudes, convert between spherical and Cartesian coordinates, and perform many functions of the main program. A synopsis of the program operation and capabilities is also presented. 2. Carbon and oxygen isotope data were obtained from the fine fraction and planktonic and benthic foraminifers from the Aptian-Albian sediments of the Ocean Drilling Program (ODP) Leg 192 at the Ontong Java Plateau (western equatorial Pacific). The delta (super 13) C curves of these Ontong Java sections can be correlated to the composite delta (super 13) C curve compiled from two sections in Italy. The difference in delta (super 13) C between shallow and benthic carbonate was used in conjunction with the calcite compensation depth to estimate the atmospheric CO (sub 2) level during the Aptian-Albian interval according to Berger and Spitzy's (1988) method, and the CO (sub 2) estimated was approximately 8120 ppm for the Early Aptian, and approximately 1570 to 730 ppm for the Late Albian. The increase in atmospheric CO (sub 2) content as a result of the Ontong Java Plateau eruption ( approximately 1800 ppm) was also estimated from the degassing of basalt magma erupted. The delta (super 18) O data were internally consistent in most cases, and were used to derive the average paleotemperatures during the Aptian-Albian (sea surface temperature: approximately 15-24 degrees C after latitudinal correction). The relatively low paleo-temperature estimates suggested that minor alteration might have occurred. Nevertheless, the temperature evolution trend had been largely preserved.
West: 157.0000 East: 164.3000 North: 1.0000 South: -5.0100
Expedition: 192
Data access:
Provider: SEDIS Publication Catalogue
Data set link: http://sedis.iodp.org/pub-catalogue/index.php?id=2005-069925 (c.f. for more detailed metadata)
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