ORCID Profile
0000-0003-2952-3465
Current Organisations
University of Oxford
,
Eidgenössische Technische Hochschule Zürich
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Publisher: Elsevier BV
Date: 05-2017
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8CC04995E
Abstract: The second coordination sphere determines ligand field in lanthanide coordination complexes.
Publisher: Springer Science and Business Media LLC
Date: 27-05-2016
Publisher: Oxford University Press (OUP)
Date: 23-01-2017
Publisher: American Geophysical Union (AGU)
Date: 11-2017
DOI: 10.1002/2017GC007219
Publisher: Wiley
Date: 16-11-2022
DOI: 10.1111/GGR.12406
Abstract: U‐Th disequilibrium dating uses the ratio of the intermediate 230 Th daughter isotope to the 238 U parent isotope to date zircon crystallisation for volcanic and plutonic rocks in Pleistocene–Holocene deposits. It is frequently used to constrain the duration and rate of magma recharge in volcanic systems. While ≲ 350 ka zircon is not in secular equilibrium in the 230 Th system, the current U‐Th disequilibrium methodology uses reference materials that are 350 ka. No reference material ≲ 350 ka has been available to validate the accuracy of the approach and ensure methods are repeatable across laboratories. This study presents zircon SS14‐28 from Jeju Island (South Korea) as a suitable reference material for U‐Th disequilibrium dating. Zircon SS14‐28 was analysed using two analytical approaches (SIMS and LA‐ICP‐MS) and four instruments: CAMECA IMS 1280, ASI SHRIMP II, sector field high‐resolution LA‐ICP‐MS and multi‐collector LA‐ICP‐MS, in four laboratories. These methods each in idually result in isochrons gradients within uncertainty (2 s ) of each other (CAMECA: 0.532 ± 0.051 (MSWD = 0.64) SF‐HR‐LA‐ICP‐MS: 0.536 ± 0.054 (MSWD = 1.3) MC‐LA‐ICP‐MS: 0.533 ± 0.041 (MSWD = 0.67) SHRIMP II: 0.68 ± 0.22 (MSWD = 0.3)). The age proposed in this study is 82 ± 6 ka calculated from a combined isochron gradient of 0.529 ± 0.025 (MSWD = 0.87, n = 132).
Publisher: Geological Society of America
Date: 20-11-2015
DOI: 10.1130/G37333.1
Location: United Kingdom of Great Britain and Northern Ireland
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Olivier Bachmann.