Astronomically calibrated ages for geomagnetic reversals within the Matuyama chron

University of Taipei > 理學院 > 應用物理暨化學學系暨碩士班 > 期刊論文 > Item 987654321/2619

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题名:	Astronomically calibrated ages for geomagnetic reversals within the Matuyama chron
作者:	Chorng-Shern Horng Meng-Yang Lee Heiko P¨alike Kuo-Yen Wei Wen-Tzong Liang Yoshiyuki Iizuka Masayuki Torii 飯塚義之李孟陽梁文宗
贡献者:	臺北市立教育大學自然科學系
日期:	2002
上传时间:	2009-07-31 10:34:39 (UTC+8)
摘要:	We present a magnetostratigraphic record from the western Philippine Sea that is tied to a marine δ18O record for the past 2.14 million years. The ages of geomagnetic reversals were astronomically calibrated by tuning the oxygen isotopic stratigraphy, yielding a chronology for the following subchrons: Matuyama/Brunhes boundary, 781±3 ka (slightly above δ18O Stage 19.3); top of the Santa Rosa polarity interval, 920 ± 2 ka (Stage 23/24); base of the Santa Rosa polarity interval, 925 ± 1 ka (Stage 24); top of the Jaramillo subchron, 988 ± 3 ka (Stage 27); base of the Jaramillo subchron, 1072 ± 2 ka (Stage 31); top of the Cobb Mountain subchron, 1173 ± 4 ka (Stage 35/36); base of the Cobb Mountain subchron, 1185 ± 5 ka (Stage 36); top of the Olduvai subchron, 1778 ± 3 ka (Stage 63/64); base of the Olduvai subchron, 1945 ± 4 ka (Stage 71/72); top of the R´eunion II subchron, 2118 ± 3 ka (Stage 80/81); and base of the R´eunion II subchron, 2133 ± 5 ka (Stage 81). This astronomically calibrated chronology independently confirms the ages of major reversals in recently published astronomically calibrated polarity timescales for the Matuyama chron. It also provides the first astronomically calibrated dates for the lower and upper reversals associated with the Cobb Mountain and Santa Rosa polarity intervals, respectively.
關聯:	Earth Planets Space, 54, p.679–690
显示于类别:	[應用物理暨化學學系暨碩士班] 期刊論文

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