东南极普里兹湾NP93-2柱样古地磁结果 |
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引用本文: | 王玉净,施逸忠.东南极普里兹湾NP93-2柱样古地磁结果[J].极地研究,1996,7(1):50-56. |
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作者姓名: | 王玉净 施逸忠 |
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摘 要: | 对东南极普里兹湾海区NP93-2柱样的古地磁研究,结果指示出两个地磁场反极性漂移,其中之一位于60-67.5cm,而67.5-72.5cm处经14C测年为10315±800aB.P.,推算该反极性漂移的年龄为9980-8880aB.P.,可能是哥德堡反极性漂移(Gothenburg,12000aB.P.前后)在该沉积物中的记录;另一反极性漂移位于27.5-32.5cm处,经14C测年为5390±600aB.P.。国际上所见报导的资料中尚无相应年龄的反极性事件可以与之对比。只有国内一些地区发现的反向极性漂移记录与之接近,但这些反极性漂移是否为同一事件的反映,或该反极性漂移本身是否真实存在,目前还难于论定,有待今后进一步工作加以证实
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关 键 词: | 古地磁 地磁极漂移 东南极 普里兹湾 |
A fossil homolodromiid crab from King George Island, Antarctica |
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Abstract: | Homolodromia inflata (Forster) described in this paper is found from theMiocene Cape Melville Formation of the glacio-marine sediments in King George Island, Antarctica.A comparison is made between the genera Homolodromia andAntarctidromia and a discussion is also made on the taxonomic placement of the genusHomolodromia in the Brachyura,we would like to consider that the genus Antarctidromia previously identified by Forster,may be a synonym of the genus Homolodromia. |
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