Ultrapotassic Magma from the Deep Mantle, Leucite Hills Lamproite, Wyoming USA

• ISHIKAWA Akira

  Department of Earth Science and Astronomy, The University of Tokyo

• KAWAI Kenji

  Department of Earth Science and Astronomy, The University of Tokyo

Bibliographic Information

Other Title

• アメリカ，ワイオミング州のリューサイトヒルズ・ランプロアイト
• The 100s : Significant Exposures of the World(No. 11)Ultrapotassic Magma from the Deep Mantle, Leucite Hills Lamproite, Wyoming USA
• ―深部マントルに由来する異常マグマ―

Abstract

 The Leucite Hills province is an isolated volcanic field of 14 lava-capped mesas and buttes, creating an impressive landscape in southwestern Wyoming. The 3.0-0.89 Ma lavas form exotic rocks described as lamproites, which are regarded as the most potassic (< 13wt% K₂O) and incompatible trace element-rich primitive magmas generated in the deep Earth. The radiogenic isotope signatures of Leucite Hills lamproites are well beyond the range of any known oceanic basalts, suggesting that the magma originated from ancient, volatile-rich anomalous mantle, recently reactivated by the convective removal of metasomatised lithosphere present at the margin of the Archean Wyoming Craton.

Journal

• Journal of Geography (Chigaku Zasshi)

  Journal of Geography (Chigaku Zasshi) 124 (3), 515-523, 2015

  Tokyo Geographical Society

Keywords

• Leucite Hills
• Wyoming Craton
• lamproite
• isotope geochemistry

Details

• CRID: 1390001204237164160
• NII Article ID: 130005087144
• NII Book ID: AN00322536
• DOI: 10.5026/jgeography.124.515
• ISSN: 18840884
• ISSN: 0022135X
• NDL BIB ID: 026597973
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I026597973
• Web Site: https://www.jstage.jst.go.jp/article/jgeography/124/3/124_124.515/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed