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Multiple subduction components in the mantle wedge: Evidence from eruptive centers in the Central Southern volcanic zone, Chile

2002; Geological Society of America; Volume: 30; Issue: 3 Linguagem: Inglês

10.1130/0091-7613(2002)030 2.0.co;2

1943-2682

Rosemary L. Hickey-Vargas, Murong Sun, Leopoldo López‐Escobar, H. Moreno-Roa, Mark K. Reagan, Julie Morris, Jeffrey G. Ryan,

earthquake and tectonic studies

Research Article| March 01, 2002 Multiple subduction components in the mantle wedge: Evidence from eruptive centers in the Central Southern volcanic zone, Chile Rosemary Hickey-Vargas; Rosemary Hickey-Vargas 1Department of Earth Sciences, Florida International University, Miami, Florida 33199, USA Search for other works by this author on: GSW Google Scholar Murong Sun; Murong Sun 1Department of Earth Sciences, Florida International University, Miami, Florida 33199, USA Search for other works by this author on: GSW Google Scholar Leopoldo López-Escobar; Leopoldo López-Escobar 2Grupo Magmatico, Instituto de Geología Económica Aplicada, Universidad de Concepción, Concepción, Chile Search for other works by this author on: GSW Google Scholar Hugo Moreno-Roa; Hugo Moreno-Roa 3Observatorio Volcanológico de los Andes del Sur, Temuco, Chile Search for other works by this author on: GSW Google Scholar Mark K. Reagan; Mark K. Reagan 4Department of Geology, University of Iowa, Iowa City, Iowa 52242, USA Search for other works by this author on: GSW Google Scholar Julie D. Morris; Julie D. Morris 5Department of Earth and Planetary Sciences, Washington University, St. Louis, Missouri 63130, USA Search for other works by this author on: GSW Google Scholar Jeff G. Ryan Jeff G. Ryan 6Department of Geology, University of South Florida, Tampa, Florida 33620, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Rosemary Hickey-Vargas 1Department of Earth Sciences, Florida International University, Miami, Florida 33199, USA Murong Sun 1Department of Earth Sciences, Florida International University, Miami, Florida 33199, USA Leopoldo López-Escobar 2Grupo Magmatico, Instituto de Geología Económica Aplicada, Universidad de Concepción, Concepción, Chile Hugo Moreno-Roa 3Observatorio Volcanológico de los Andes del Sur, Temuco, Chile Mark K. Reagan 4Department of Geology, University of Iowa, Iowa City, Iowa 52242, USA Julie D. Morris 5Department of Earth and Planetary Sciences, Washington University, St. Louis, Missouri 63130, USA Jeff G. Ryan 6Department of Geology, University of South Florida, Tampa, Florida 33620, USA Publisher: Geological Society of America Received: 18 Jun 2001 Revision Received: 29 Oct 2001 Accepted: 19 Nov 2001 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2002) 30 (3): 199–202. https://doi.org/10.1130/0091-7613(2002)030 2.0.CO;2 Article history Received: 18 Jun 2001 Revision Received: 29 Oct 2001 Accepted: 19 Nov 2001 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Rosemary Hickey-Vargas, Murong Sun, Leopoldo López-Escobar, Hugo Moreno-Roa, Mark K. Reagan, Julie D. Morris, Jeff G. Ryan; Multiple subduction components in the mantle wedge: Evidence from eruptive centers in the Central Southern volcanic zone, Chile. Geology 2002;; 30 (3): 199–202. doi: https://doi.org/10.1130/0091-7613(2002)030 2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract In the Andean Central Southern volcanic zone, basalts from small eruptive centers near the large composite center Volcan Villarrica are poor in fluid mobile elements, such as B, Cs, Rb, K, Pb, Ba, and U, compared with concurrently erupted Villarrica basalts. New 10Be and U-series isotopic data for these centers show that fluid mobile element–poor small eruptive center basalts have small 10Be/9Be ratios (1.6–1.9 × 10−11) and (238U/230Th) activity ratios near 1.0, whereas basalts from Villarrica show 238U enrichment and larger 10Be/9Be ratios (4.0–6.4 × 10−11). These results suggest that small eruptive center basalts include materials derived from the subducted lithosphere that were stored in the mantle wedge for 350 k.y. to 3 m.y. That these materials are poor in fluid mobile elements may reflect fluid expulsion during solidification or their formation in an initially hotter subduction setting. In contrast, the composite center basalts sample materials rich in fluid mobile elements that were recently transferred into the mantle wedge from the subducted lithosphere. The results confirm that mantle wedges in subduction zones include subducted materials added to the wedge over both long and short time scales. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.