New monazite U-Pb age constraints on the evolution of the Paleoproterozoic Vaasa granitoid batholith, western Finland
作者: A.K. KotilainenI. MänttäriM. KurhilaP. HölttäO.T. Rämö
刊名: Bulletin of the Geological Society of Finland, 2016, Vol.88 (1), pp.5-20
来源数据库: Directory of Open Access Journals
DOI: 10.17741/bgsf/88.1.001
关键词: MonaziteU–Pb geochronologyAnatexisGranitoidSvecofennianVaasaFinland
原始语种摘要: The Vaasa batholith, western Finland, is a large, peraluminous granitoid pluton that crystallized at 1.88–1.87 Ga during the culmination of the Svecofennian orogeny. The batholith has gradual contacts, through metatexites and diatexites, with the enveloping metasedimentary rocks of the Bothnian Belt. We present ID-TIMS U-Pb age data on monazite from granitoids and xenoliths of the Vaasa batholith and combine these with published U–Pb zircon ages in order to shed further light on the evolution of the Vaasa batholith. The apparent monazite ages for seven of the examined samples are 1870–1863 Ma, and 1855±3 Ma for one further sample from the southern part of the batholith. Combined with pre-existing data, the monazite ages of the granitoids are 9 to 18 Ma (face values) or 3 to 9 Ma (external...
全文获取路径: DOAJ  (合作)
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关键词翻译
关键词翻译
  • monazite 独居石
  • batholith 岩基
  • granitoid 人造花岗石面
  • zircon 锆石
  • geochronology 地质年代学
  • constraints 系统规定参数
  • Finland 芬兰
  • orogeny 造山运动
  • magmatic 岩浆的
  • peraluminous 过铝质的