40Ar/39Ar dates of eastern Iceland lavas
Twenty-two plateau ages obtained by the 40Ar/39Ar step-heating method span most of the time of formation of eastern Iceland. With one exception the dates are consistent with the stratigraphy, the exception having a very unusual argon release pattern. It is concluded that the 40Ar/39Ar step-heating m...
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Oxford University Press
1980
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fthighwire:oai:open-archive.highwire.org:gji:60/1/37 2023-05-15T16:47:10+02:00 40Ar/39Ar dates of eastern Iceland lavas Mussett, A. E. Ross, J. G. Gibson, I. L. 1980-01-01 00:00:00.0 text/html http://gji.oxfordjournals.org/cgi/content/short/60/1/37 https://doi.org/10.1111/j.1365-246X.1980.tb02579.x en eng Oxford University Press http://gji.oxfordjournals.org/cgi/content/short/60/1/37 http://dx.doi.org/10.1111/j.1365-246X.1980.tb02579.x Copyright (C) 1980, Oxford University Press Articles TEXT 1980 fthighwire https://doi.org/10.1111/j.1365-246X.1980.tb02579.x 2012-11-23T22:16:05Z Twenty-two plateau ages obtained by the 40Ar/39Ar step-heating method span most of the time of formation of eastern Iceland. With one exception the dates are consistent with the stratigraphy, the exception having a very unusual argon release pattern. It is concluded that the 40Ar/39Ar step-heating method can give correct dates on hydrothermally altered samples the total fusion ages of which are not correct; however, it is not possible to conclude from the results obtained that the method is inherently more accurate than the conventional method using carefully selected samples. Though it is known from geological evidence that minor irregularities of spreading have occurred the results show that, within the resolution of the dates, spreading has been steady and symmetrical; in particular, neither a large eastward jump nor repetitive westward jumps can have occurred. The average half spreading rate for the period 2 Myr to 12 Myr ago was 0.78 ± 0.16 cm yr−1. Text Iceland HighWire Press (Stanford University) Geophysical Journal International 60 1 37 52 |
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HighWire Press (Stanford University) |
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English |
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Articles |
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Articles Mussett, A. E. Ross, J. G. Gibson, I. L. 40Ar/39Ar dates of eastern Iceland lavas |
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Articles |
description |
Twenty-two plateau ages obtained by the 40Ar/39Ar step-heating method span most of the time of formation of eastern Iceland. With one exception the dates are consistent with the stratigraphy, the exception having a very unusual argon release pattern. It is concluded that the 40Ar/39Ar step-heating method can give correct dates on hydrothermally altered samples the total fusion ages of which are not correct; however, it is not possible to conclude from the results obtained that the method is inherently more accurate than the conventional method using carefully selected samples. Though it is known from geological evidence that minor irregularities of spreading have occurred the results show that, within the resolution of the dates, spreading has been steady and symmetrical; in particular, neither a large eastward jump nor repetitive westward jumps can have occurred. The average half spreading rate for the period 2 Myr to 12 Myr ago was 0.78 ± 0.16 cm yr−1. |
format |
Text |
author |
Mussett, A. E. Ross, J. G. Gibson, I. L. |
author_facet |
Mussett, A. E. Ross, J. G. Gibson, I. L. |
author_sort |
Mussett, A. E. |
title |
40Ar/39Ar dates of eastern Iceland lavas |
title_short |
40Ar/39Ar dates of eastern Iceland lavas |
title_full |
40Ar/39Ar dates of eastern Iceland lavas |
title_fullStr |
40Ar/39Ar dates of eastern Iceland lavas |
title_full_unstemmed |
40Ar/39Ar dates of eastern Iceland lavas |
title_sort |
40ar/39ar dates of eastern iceland lavas |
publisher |
Oxford University Press |
publishDate |
1980 |
url |
http://gji.oxfordjournals.org/cgi/content/short/60/1/37 https://doi.org/10.1111/j.1365-246X.1980.tb02579.x |
genre |
Iceland |
genre_facet |
Iceland |
op_relation |
http://gji.oxfordjournals.org/cgi/content/short/60/1/37 http://dx.doi.org/10.1111/j.1365-246X.1980.tb02579.x |
op_rights |
Copyright (C) 1980, Oxford University Press |
op_doi |
https://doi.org/10.1111/j.1365-246X.1980.tb02579.x |
container_title |
Geophysical Journal International |
container_volume |
60 |
container_issue |
1 |
container_start_page |
37 |
op_container_end_page |
52 |
_version_ |
1766037247828688896 |