A Vestige of Earth's Oldest Ophiolite
A sheeted-dike complex within the ∼3.8-billion-year-old Isua supracrustal belt (ISB) in southwest Greenland provides the oldest evidence of oceanic crustal accretion by spreading. The geochemistry of the dikes and associated pillow lavas demonstrates an intraoceanic island arc and mid-ocean ridge–li...
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American Association for the Advancement of Science (AAAS)
2007
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Online Access: | http://dx.doi.org/10.1126/science.1139170 https://www.science.org/doi/pdf/10.1126/science.1139170 |
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craaas:10.1126/science.1139170 2024-09-15T18:09:30+00:00 A Vestige of Earth's Oldest Ophiolite Furnes, Harald de Wit, Maarten Staudigel, Hubert Rosing, Minik Muehlenbachs, Karlis 2007 http://dx.doi.org/10.1126/science.1139170 https://www.science.org/doi/pdf/10.1126/science.1139170 en eng American Association for the Advancement of Science (AAAS) Science volume 315, issue 5819, page 1704-1707 ISSN 0036-8075 1095-9203 journal-article 2007 craaas https://doi.org/10.1126/science.1139170 2024-08-29T04:00:57Z A sheeted-dike complex within the ∼3.8-billion-year-old Isua supracrustal belt (ISB) in southwest Greenland provides the oldest evidence of oceanic crustal accretion by spreading. The geochemistry of the dikes and associated pillow lavas demonstrates an intraoceanic island arc and mid-ocean ridge–like setting, and their oxygen isotopes suggest a hydrothermal ocean-floor–type metamorphism. The pillows and dikes are associated with gabbroic and ultramafic rocks that together make up an ophiolitic association: the Paleoarchean Isua ophiolite complex. These sheeted dikes offer evidence for remnants of oceanic crust formed by sea-floor spreading of the earliest intact rocks on Earth. Article in Journal/Newspaper Greenland AAAS Resource Center (American Association for the Advancement of Science) Science 315 5819 1704 1707 |
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Open Polar |
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AAAS Resource Center (American Association for the Advancement of Science) |
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craaas |
language |
English |
description |
A sheeted-dike complex within the ∼3.8-billion-year-old Isua supracrustal belt (ISB) in southwest Greenland provides the oldest evidence of oceanic crustal accretion by spreading. The geochemistry of the dikes and associated pillow lavas demonstrates an intraoceanic island arc and mid-ocean ridge–like setting, and their oxygen isotopes suggest a hydrothermal ocean-floor–type metamorphism. The pillows and dikes are associated with gabbroic and ultramafic rocks that together make up an ophiolitic association: the Paleoarchean Isua ophiolite complex. These sheeted dikes offer evidence for remnants of oceanic crust formed by sea-floor spreading of the earliest intact rocks on Earth. |
format |
Article in Journal/Newspaper |
author |
Furnes, Harald de Wit, Maarten Staudigel, Hubert Rosing, Minik Muehlenbachs, Karlis |
spellingShingle |
Furnes, Harald de Wit, Maarten Staudigel, Hubert Rosing, Minik Muehlenbachs, Karlis A Vestige of Earth's Oldest Ophiolite |
author_facet |
Furnes, Harald de Wit, Maarten Staudigel, Hubert Rosing, Minik Muehlenbachs, Karlis |
author_sort |
Furnes, Harald |
title |
A Vestige of Earth's Oldest Ophiolite |
title_short |
A Vestige of Earth's Oldest Ophiolite |
title_full |
A Vestige of Earth's Oldest Ophiolite |
title_fullStr |
A Vestige of Earth's Oldest Ophiolite |
title_full_unstemmed |
A Vestige of Earth's Oldest Ophiolite |
title_sort |
vestige of earth's oldest ophiolite |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
2007 |
url |
http://dx.doi.org/10.1126/science.1139170 https://www.science.org/doi/pdf/10.1126/science.1139170 |
genre |
Greenland |
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Greenland |
op_source |
Science volume 315, issue 5819, page 1704-1707 ISSN 0036-8075 1095-9203 |
op_doi |
https://doi.org/10.1126/science.1139170 |
container_title |
Science |
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315 |
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5819 |
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1704 |
op_container_end_page |
1707 |
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1810447073952137216 |