The backarc mantle lithosphere in Patagonia, South America
作者: Giorgio RivalentiMaurizio MazzucchelliAngela LauroraSara I.A. CiuffiAlberto ZanettiRiccardo VannucciCarlos A. Cingolani
作者单位: 1Dipartimento di Scienze della Terra, Università di Modena e Reggio Emilia, P.le S. Eufemia, 19, I-41100 Modena, Italy
2Dipartimento di Scienze della Terra, Università di Pavia and CNR Istituto di Geoscienze e Georisorse, Sezione di Pavia, Via Ferrata, 1, I-27100 Pavia, Italy
3Centro de Investigaciones Geológicas, Universidad Nacional de La Plata, 644 Calle No. 1, 1900 La Plata, Argentina
刊名: Journal of South American Earth Sciences, 2004, Vol.17 (2), pp.121-152
来源数据库: Elsevier Journal
DOI: 10.1016/j.jsames.2004.05.009
关键词: LithosphereMeltingPercolationReactionSlab
原始语种摘要: Abstract(#br)The backarc Patagonia mantle underwent pervasive regional re-crystallisation that left only remnants of the pre-existing mantle. Anhydrous xenoliths (dominantly lherzolites and harzburgites, few dunites) are predominant. Xenoliths containing hydrous phases (lherzolites and harzburgites, rare wehrlites) abundantly occur only at G. Gregores. Bulk-rock and clinopyroxene trace element patterns range from predominant LREE-depleted, LILE-enriched and variably Nb-depleted, to LREE-enriched patterns, with negative Zr, Hf and Ti spikes when amphibole is present. V-shaped trace element patterns are found only in rare non-recrystallised xenoliths. Trace element abundances in potential melts calculated from clinopyroxene are similar to arc magmas, but in southern Patagonia fade eastwards...
全文获取路径: Elsevier  (合作)
影响因子:1.533 (2012)

  • South America 南美洲
  • mantle 地幔
  • lithosphere 岩石圈
  • derived 导生的
  • clinopyroxene 斜辉石
  • subduction 俯冲
  • remnants 残余
  • depleted 废弃的
  • hydrous 含水的
  • northern 北方的