Late-Holocene glacier variations in the Cordillera Darwin, Tierra del Fuego, Chile
Late-Holocene glacier variations in the Cordillera Darwin, Tierra del Fuego, Chile
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智利火地岛达尔文山脉的全新世晚期冰川变化
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发表时间：
1996
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影响因子：
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通讯作者：
P. Holmlund
中科院分区：
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作者：
J. Kuylenstierna;G. Rosqvist;P. Holmlund
对智利火地岛达尔文山脉皮亚地区巴伊亚地区终碛近端和远端取样的泥炭和宏化石进行的放射性碳测年表明，冰川系统在3060 BP之前的某个时间达到了最大值，在940 BP之前以及940 BP和675 BP之间。在2605 ± 80 BP之前，1950 ± 75和1790 ± 75 BP之间，以及1790 ± 75 BP之后不久的某个时间，冰川退缩了4公里，到达了一个定点位置，在那里它阻塞了一个湖泊。到250年前，冰川系统已经向峡湾头后退了15公里以上，可能已经接近现在的位置。因此，我们没有从巴伊亚皮亚获得任何证据表明，在全球“小冰期”最大期（17世纪至19世纪）发生了冰川前进。
Radiocarbon dates obtained on peat and macrofossils, sampled both proximally and distally, of a terminal moraine in the Bahia Pia area, Cordillera Darwin, Tierra del Fuego, Chile, indicate that the glacier system reached maxima sometime before 3060 BP, prior to 940 BP and between 940 BP and 675 BP. The glacier retreated 4 km to a pinning-point position where it dammed a lake before 2605 ± 80 BP, between 1950 ± 75 and 1790 ± 75 BP and some time shortly after 1790 ± 75 BP. By 250 BP the glacier system had receded more than 15 km towards the fjord head and probably reached close to its present position. Thus we obtained no evidence from Bahia Pia of any glacial advance occurring during the global 'Little Ice Age' maximum (seventeenth to nineteenth centuries).