Paleosecular variation and paleointensity records for the last millennium from southern South America (Laguna Potrok Aike, Santa Cruz, Argentina)

被引：13
|
作者：
Gogorza, C. S. G. [1 ,2 ,3 ]
Sinito, A. M. [1 ,2 ]
Ohlendorf, C. [3 ]
Kastner, S. [3 ]
Zolitschka, B. [3 ]
机构：
[1] Univ Nacl Ctr, IFAS, RA-7000 Tandil, Argentina
[2] Consejo Nacl Invest Cient & Tecn, RA-1033 Buenos Aires, DF, Argentina
[3] Univ Bremen, Inst Geog Geopolar, D-28359 Bremen, Germany
来源：
PHYSICS OF THE EARTH AND PLANETARY INTERIORS | 2011年 / 184卷 / 1-2期
关键词：
Paleosecular variation; Relative paleointensity; ICDP; PASADO; Southern Hemisphere; GEOMAGNETIC SECULAR VARIATIONS; EL-TREBOL PATAGONIA; HOLOCENE-PLEISTOCENE SEDIMENTS; RELATIVE PALEOINTENSITY; LAKE-SEDIMENTS; FIELD; ESCONDIDO; KYR; CENTURIES; CORES;
D O I：
10.1016/j.pepi.2010.10.011
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
High-resolution paleo- and rock magnetic studies were performed on a group of four sediment cores from Laguna Potrok Aike (Santa Cruz, Argentina) representing the time period AD 1300-2000. The rock magnetic analyses show that the main magnetic mineral is (titano)magnetite with a concentration between 0.01 and 0.08%, and a grain size of 4-15 mu m. This study is helpful in order to complete the paleosecular variation (PSV) and paleointensity type curves for South America which do not have a detailed record for the last millennium. The comparison with the study carried out for Lake El Trebol shows a very good agreement, supporting that PSV records of south-western Argentina can be developed into a stratigraphic correlation tool on a regional scale. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：41 / 50
页数：10
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