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The use of biotite trace element compositions for fingerprinting magma batches at Las Caņadas volcano, Tenerife

Citation

Sliwinski, JT and Ellis, BS and Davila-Harris, P and Wolff, JA and Olin, PH and Bachmann, O, The use of biotite trace element compositions for fingerprinting magma batches at Las Canadas volcano, Tenerife, Bulletin of Volcanology, 79, (1) Article 1. ISSN 0258-8900 (2017) [Refereed Article]

Copyright Statement

Copyright Springer-Verlag Berlin Heidelberg 2016

DOI: doi:10.1007/s00445-016-1088-2

Abstract

Accurate identification of individual volcanic events in the field is crucial for constraining eruption volumes and calculating recurrence intervals between eruptive episodes. Due to complexities of pyroclastic transport and deposition and intra-unit textural variability, such identification can be challenging. We present a novel method for fingerprinting ignimbrites via trace element chemistry (V, Co, Nb) in biotite by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). Using samples from the alkaline magmatic series of Tenerife, we are able to demonstrate (1) clustering of previously characterized units into distinct, homogeneous groups based on V, Co, and Nb concentrations in biotite, despite the presence of extreme variation and zonation in other trace elements (Ba, Sr, Rb) that indicate complex petrogenetic processes, and (2) biotite compositions are similar throughout a deposit and relatively independent of stratigraphic height or juvenile clast texture (crystal-rich vs crystal-poor). Our results show that trace elements in biotite can be used to fingerprint eruptions and correlate geographically separated volcanic deposits, including those preserved in offshore turbidite records.

Item Details

Item Type:Refereed Article
Keywords:alkaline magmatism, biotite, stratigraphy, tenerife, trace element chemistry
Research Division:Earth Sciences
Research Group:Geology
Research Field:Volcanology
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Earth Sciences
Author:Olin, PH (Dr Paul Olin)
ID Code:126995
Year Published:2017
Deposited By:CODES ARC
Deposited On:2018-07-06
Last Modified:2018-08-24
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