U–Pb zircon ages of the host rocks of the Juomasuo Au–Co–Cu deposit, northeastern Finland
作者: P. NikkolaI. MänttäriO.T. Rämö
刊名: Bulletin of the Geological Society of Finland, 2017, Vol.89 (1), pp.20-34
来源数据库: Directory of Open Access Journals
DOI: 10.17741/bgsf/89.1.002
关键词: U–Pb geochronologyZirconLA-MC-ICP-MSJuomasuoFinland
原始语种摘要: The Salittu Formation is one of the few metavolcanic successions in the U-Pb zircon single grain dating using the LA-MC-ICP-MS technique was utilized to determine the age of the host rocks of the Juomasuo Au-Co-Cu deposit located in the late Archean Kuusamo supracrustal belt. Even though the dated samples have diverse geochemical signatures that imply felsic volcanic and sedimentary precursors, the U-Pb data revealed heterogeneous detrital zircon populations for all samples. The host rocks are thus considered to belong to reworked sedimentary/volcano-sedimentary sequences. The maximun depositional ages of the samples fall in the 2.75-2.65 Ga age window, and no Paleoproterozoic ages were recovered in the examined zircon grains (151 analytical spots in total). In addition, a younger...
全文获取路径: DOAJ  (合作)
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关键词翻译
关键词翻译
  • zircon 锆石
  • Co 公司
  • northeastern 来自东北的
  • metamorphic 变质的
  • geochronology 地质年代学
  • postmagmatic 岩浆期后的
  • detrital 碎屑的
  • sedimentary 沉积的
  • dating 年代测定
  • provenance 原产地