A NEW SAMPLE PREPARATION SYSTEM FOR MICRO-C-14 DATING OF GLACIER ICE WITH A FIRST APPLICATION TO A HIGH ALPINE ICE CORE FROM COLLE GNIFETTI (SWITZERLAND)
Radiometric dating of glacier ice is an essential tool where stratigraphic dating methods cannot be applied. This study focuses on Alpine glacier ice and presents a new sample preparation system for dating of glacier ice samples via radiocarbon (14C) dating of the microscopic particulate organic car...
Published in: | Radiocarbon |
---|---|
Main Authors: | , , , , , , |
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
2018
|
Subjects: | |
Online Access: | https://hdl.handle.net/10278/5014731 https://doi.org/10.1017/RDC.2017.99 |
id |
ftuniveneziairis:oai:iris.unive.it:10278/5014731 |
---|---|
record_format |
openpolar |
spelling |
ftuniveneziairis:oai:iris.unive.it:10278/5014731 2024-04-14T08:13:03+00:00 A NEW SAMPLE PREPARATION SYSTEM FOR MICRO-C-14 DATING OF GLACIER ICE WITH A FIRST APPLICATION TO A HIGH ALPINE ICE CORE FROM COLLE GNIFETTI (SWITZERLAND) Hoffmann H Preunkert S Legrand M Leinfelder D Bohleber P Friedrich R Wagenbach D Hoffmann, H Preunkert, S Legrand, M Leinfelder, D Bohleber, P Friedrich, R Wagenbach, D 2018 https://hdl.handle.net/10278/5014731 https://doi.org/10.1017/RDC.2017.99 unknown info:eu-repo/semantics/altIdentifier/wos/WOS:000430929600011 volume:60 issue:2 firstpage:517 lastpage:533 numberofpages:17 journal:RADIOCARBON https://hdl.handle.net/10278/5014731 doi:10.1017/RDC.2017.99 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85041572453 Settore GEO/08 - Geochimica e Vulcanologia info:eu-repo/semantics/article 2018 ftuniveneziairis https://doi.org/10.1017/RDC.2017.99 2024-03-21T17:57:10Z Radiometric dating of glacier ice is an essential tool where stratigraphic dating methods cannot be applied. This study focuses on Alpine glacier ice and presents a new sample preparation system for dating of glacier ice samples via radiocarbon (14C) dating of the microscopic particulate organic carbon (POC) fraction incorporated in the ice matrix. An adaptable, low-cost inline filtration-oxidation-unit (REFILOX) has been developed, which for the first time unifies all sample preparation steps from ice filtration to CO2 quantification in one closed setup. A systematic 14C investigation of modern European aerosol samples revealed that a POC combustion temperature of 340°C provides the best representation of the real sample age. A very low process blank of maximally 0.3±0.1 μgC now enables 14C dating of high Alpine ice samples, where POC concentrations are generally low (typically 10–50 μgC/kg), in an ice sample mass range of 300–500 g. In a first successful application, the method was used to obtain age constraints for an ice core from the cold, high Alpine firn saddle Colle Gnifetti (Switzerland). Analysis of the bottom ice core sections revealed a basal age of 4171–3923 cal yr BP but also a so far enigmatic discontinuity in the age-depth relationship. Article in Journal/Newspaper ice core Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) Radiocarbon 60 2 517 533 |
institution |
Open Polar |
collection |
Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) |
op_collection_id |
ftuniveneziairis |
language |
unknown |
topic |
Settore GEO/08 - Geochimica e Vulcanologia |
spellingShingle |
Settore GEO/08 - Geochimica e Vulcanologia Hoffmann H Preunkert S Legrand M Leinfelder D Bohleber P Friedrich R Wagenbach D A NEW SAMPLE PREPARATION SYSTEM FOR MICRO-C-14 DATING OF GLACIER ICE WITH A FIRST APPLICATION TO A HIGH ALPINE ICE CORE FROM COLLE GNIFETTI (SWITZERLAND) |
topic_facet |
Settore GEO/08 - Geochimica e Vulcanologia |
description |
Radiometric dating of glacier ice is an essential tool where stratigraphic dating methods cannot be applied. This study focuses on Alpine glacier ice and presents a new sample preparation system for dating of glacier ice samples via radiocarbon (14C) dating of the microscopic particulate organic carbon (POC) fraction incorporated in the ice matrix. An adaptable, low-cost inline filtration-oxidation-unit (REFILOX) has been developed, which for the first time unifies all sample preparation steps from ice filtration to CO2 quantification in one closed setup. A systematic 14C investigation of modern European aerosol samples revealed that a POC combustion temperature of 340°C provides the best representation of the real sample age. A very low process blank of maximally 0.3±0.1 μgC now enables 14C dating of high Alpine ice samples, where POC concentrations are generally low (typically 10–50 μgC/kg), in an ice sample mass range of 300–500 g. In a first successful application, the method was used to obtain age constraints for an ice core from the cold, high Alpine firn saddle Colle Gnifetti (Switzerland). Analysis of the bottom ice core sections revealed a basal age of 4171–3923 cal yr BP but also a so far enigmatic discontinuity in the age-depth relationship. |
author2 |
Hoffmann, H Preunkert, S Legrand, M Leinfelder, D Bohleber, P Friedrich, R Wagenbach, D |
format |
Article in Journal/Newspaper |
author |
Hoffmann H Preunkert S Legrand M Leinfelder D Bohleber P Friedrich R Wagenbach D |
author_facet |
Hoffmann H Preunkert S Legrand M Leinfelder D Bohleber P Friedrich R Wagenbach D |
author_sort |
Hoffmann H |
title |
A NEW SAMPLE PREPARATION SYSTEM FOR MICRO-C-14 DATING OF GLACIER ICE WITH A FIRST APPLICATION TO A HIGH ALPINE ICE CORE FROM COLLE GNIFETTI (SWITZERLAND) |
title_short |
A NEW SAMPLE PREPARATION SYSTEM FOR MICRO-C-14 DATING OF GLACIER ICE WITH A FIRST APPLICATION TO A HIGH ALPINE ICE CORE FROM COLLE GNIFETTI (SWITZERLAND) |
title_full |
A NEW SAMPLE PREPARATION SYSTEM FOR MICRO-C-14 DATING OF GLACIER ICE WITH A FIRST APPLICATION TO A HIGH ALPINE ICE CORE FROM COLLE GNIFETTI (SWITZERLAND) |
title_fullStr |
A NEW SAMPLE PREPARATION SYSTEM FOR MICRO-C-14 DATING OF GLACIER ICE WITH A FIRST APPLICATION TO A HIGH ALPINE ICE CORE FROM COLLE GNIFETTI (SWITZERLAND) |
title_full_unstemmed |
A NEW SAMPLE PREPARATION SYSTEM FOR MICRO-C-14 DATING OF GLACIER ICE WITH A FIRST APPLICATION TO A HIGH ALPINE ICE CORE FROM COLLE GNIFETTI (SWITZERLAND) |
title_sort |
new sample preparation system for micro-c-14 dating of glacier ice with a first application to a high alpine ice core from colle gnifetti (switzerland) |
publishDate |
2018 |
url |
https://hdl.handle.net/10278/5014731 https://doi.org/10.1017/RDC.2017.99 |
genre |
ice core |
genre_facet |
ice core |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000430929600011 volume:60 issue:2 firstpage:517 lastpage:533 numberofpages:17 journal:RADIOCARBON https://hdl.handle.net/10278/5014731 doi:10.1017/RDC.2017.99 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85041572453 |
op_doi |
https://doi.org/10.1017/RDC.2017.99 |
container_title |
Radiocarbon |
container_volume |
60 |
container_issue |
2 |
container_start_page |
517 |
op_container_end_page |
533 |
_version_ |
1796310935540858880 |