Constant 4He concentration and 190Pt‐4He age of detrital Pt‐alloy grains from the Santiago River, Ecuador: potential as a 4He mineral reference material

Yakubovich, O. V., Stuart, F. M. , Ivanova, E. S. and Gervilla, F. (2023) Constant 4He concentration and 190Pt‐4He age of detrital Pt‐alloy grains from the Santiago River, Ecuador: potential as a 4He mineral reference material. Geostandards and Geoanalytical Research, (doi: 10.1111/ggr.12502) (Early Online Publication)

Abstract

Over the last few decades geo- and thermochronological techniques based on the accumulation of radiogenic 4He in minerals have gained popularity. Currently there is no mineral-based 4He reference material that allows routine screening of gas extraction and measurement procedures. The commonly-used mineral reference material for (U-Th)/He thermochronology have variable U and Th contents which result in variable 4He concentrations. Here we demonstrate that native platinum grains (RS-Pt) from placer deposits in the Santiago River, Ecuador, yield constant 4He contents and may be used as a reference material. Helium concentrations measured at the Scottish Universities Environmental Research Centre (n = 8) and Institute of Precambrian Geology and Geochronology RAS (n = 9) noble gas laboratories yield mean 4He concentrations that overlap at the 95% confidence level. The weighted mean 4He concentration is 215 ± 2 × 1011 at g-1 (2s) and mean 190Pt-4He age is 39.6 ± 0.7 Ma (2s). Samples of the Santiago River Pt concentrate are available on request from the SUERC laboratory.

• Item Type: Articles
• Additional Information: This research was supported financially by RTD of IPGG RAS (FMUW-2022-0003) and SUERC.
• Status: Early Online Publication
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Stuart, Professor Fin
• Authors: Yakubovich, O. V., Stuart, F. M., Ivanova, E. S., and Gervilla, F.
• College/School: College of Science and Engineering > Scottish Universities Environmental Research Centre
• Journal Name: Geostandards and Geoanalytical Research
• Publisher: Wiley
• ISSN: 1639-4488
• ISSN (Online): 1751-908X
• Published Online: 14 May 2023
• Copyright Holders: Copyright © 2023 The Authors
• First Published: First published in Geostandards and Geoanalytical Research 2023
• Publisher Policy: Reproduced in accordance with the publisher copyright policy