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Volcanoes of Zealandia and the Southwest Pacific
New Zealand Journal of Geology and Geophysics ( IF 1.9 ) Pub Date : 2020-01-23 , DOI: 10.1080/00288306.2020.1713824
Nick Mortimer 1 , James M. Scott 2
Affiliation  

ABSTRACT New Zealand and the southwest Pacific region have a well-preserved geological record of Late Cretaceous to Holocene volcanism. Volcanoes and volcanic fields formed in six main tectonic settings: (1) oceanic crust; (2) large igneous provinces; (3) subduction-related volcanic chains; (4) intraplate related to Late Cretaceous rifting of Zealandia from Gondwana; (5) intraplate in Cenozoic age progressive chains that define so-called hotspot tracks; and (6) intraplate with a scattered, Cenozoic, non-age progressive, non-rift-related distribution. At least 500 volcanic fields, stratovolcanoes and seamounts, active within the last 105 million years, can be identified within the c. 5 million km2 area of Zealandia continental crust. Volcanic rocks from onland New Zealand are the best-studied and dated but represent material from less than a fifth of Zealandia’s volcanoes and volcanic fields.

中文翻译:

西兰岛和西南太平洋火山

摘要新西兰和西南太平洋地区有保存完好的晚白垩世至全新世火山作用的地质记录。火山和火山场在六个主要构造环境中形成:(1)大洋地壳;(2) 火成岩大省;(3) 与俯冲有关的火山链;(4) 与冈瓦纳纪西兰岛晚白垩世裂谷有关的板内;(5) 定义所谓热点轨迹的新生代渐进链中的板内;(6) 板内具有分散的、新生代的、非年龄渐进性、非裂隙相关分布。在过去 1.05 亿年内活跃的至少 500 个火山区、层状火山和海山,可以在 c. 500 万平方公里的西兰大陆地壳面积。
更新日期:2020-01-23
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