Analysis of sedimentary environment of core AB-67 at Barrow

Guo, Wang and Qingsong, Zhang and Yuanfang, Li (1998) Analysis of sedimentary environment of core AB-67 at Barrow. Advances in Polar Science, 9 (2). pp. 101-108.

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Abstract

A total of 48 samples from core AB-67 at Barrow are analyzed for 25 grain size items and 44 geochemical items. Q-mode factor analysis applied to these data yielded 4 factors. Mapping of there factor showed their close affinity to sedimentary environment; these core sedimentary rate, precipitation, sea level change, annual temperature. Paleoenvironmentary transfer functions were defined to estimate mean annual temperature and annual precipitation from co-relationship between 5 samples at core-top and observation record from Barrow Meteorology Observatory. Sedimentary rate was determined from dating by 210Pb and several environment events, and sea level from changes of sedimentary phase. The reconstructed temperature and precipitation curves show that Barrow climate is colder and drier in the 16th and the 17th century, temperature rose up and precipitation fluctuated sharply in the 18th and the 19th century, these two changes are greater in the 20th century. The reconstructed temperature curves agree with the variation of assemblages of micropaleontology.

Item Type:	Article
Related URLs:
Keywords:	Barrow, drilling core, sedimentary environment, Q-mode factor analysis, transfer function.
Subjects:	Unspecified
Organizations:	Unspecified
Date Deposited:	25 Apr 2023 13:33
URI:	http://library.arcticportal.org/id/eprint/2158

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