Oxygen isotopes in cosmic spherules and the composition of the near Earth interplanetary dust complex
作者: Carole CordierLuigi Folco
作者单位: 1Univ. Grenoble Alpes, ISTerre, F-38041 Grenoble, France
2CNRS, ISTerre, F-38041 Grenoble, France
3Dipartimento di Scienze della Terra, Università di Pisa, Via S. Maria 53, 56126 Pisa, Italy
刊名: Geochimica et Cosmochimica Acta, 2014, Vol.146 , pp.18-26
来源数据库: Elsevier Journal
DOI: 10.1016/j.gca.2014.09.038
英文摘要: Abstract(#br)A long-standing controversy in the micrometeorite community regards the relative contribution of primitive asteroids or comets and of evolved asteroids to the interplanetary dust cloud. We compiled and studied a large set of oxygen isotopic data from the literature on cosmic spherules from different collections covering different influx periods within the last ∼1Myr. Cosmic spherules (micrometeorites melted during atmospheric entry) are the most abundant micrometeorites in worldwide collections. According to several models, they are representative of the composition and origin of micrometeorites >50μm in size. Spherule statistics (136 spherules, 50–2280μm in size) indicate that at least 20% of the micrometeoroid complex...
全文获取路径: Elsevier  (合作)
影响因子:3.884 (2012)

  • complex 超群
  • Earth 地球
  • interplanetary 星际
  • Oxygen 氧气
  • cosmic 宇宙的
  • composition 构图