A Middle-late Quaternary Age For The Adakitic Arc Volcanics Of Hautere (solander Island), Southern Ocean

N. Mortimer; P.B. Gans; D.C. Mildenhall

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A Middle-late Quaternary Age For The Adakitic Arc Volcanics Of Hautere (solander Island), Southern Ocean

机译：南大洋洲（索兰德岛）的埃达克弧火山的第四纪晚期

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Hautere (Solander Island) and five nearby, mainly submerged volcanic centres represent the only known subduction-related volcanism on the Australian-Pacific plate boundary south of New Zealand. Two new Ar-Ar biotite ages from Hautere indicate magmatism they were active between 150 and 400ka (middle to late Quaternary). This contrasts with the previously proposed Pliocene to early Quaternary age range based on less well constrained K-Ar dating. The new radiometric ages are consistent with revised pollen ages. New trace element analyses confirm the subduction-related and adakitic nature of the igneous rocks.

机译：Hautere（索兰德岛）和附近的五个主要被淹没的火山中心，是新西兰南部澳大利亚-太平洋板块边界上唯一已知的与俯冲有关的火山活动。 Hautere的两个新的Ar-Ar黑云母年龄表明岩浆作用活跃于150至400ka（第四纪中期至晚期）之间。这与先前提出的基于不太严格的K-Ar定年的上新世至第四纪早期年龄范围形成对比。新的辐射年龄与修订的花粉年龄一致。新的痕量元素分析证实了火成岩的俯冲相关和adakitic性质。

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来源
《Journal of Volcanology and Geothermal Research》 |2008年第4期|p.701-707|共7页
作者
N. Mortimer; P.B. Gans; D.C. Mildenhall;
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作者单位

CNS Science, Private Bag 1930, Dunedin, New Zealand;

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原文格式 PDF
正文语种 eng
中图分类天文学、地球科学;
关键词
petrology; geochronology; geochemistry; palynology; subduction; new zealand;

机译：岩石学;年代学;地球化学;孢粉学;俯冲;新西兰;

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A Middle-late Quaternary Age For The Adakitic Arc Volcanics Of Hautere (solander Island), Southern Ocean

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