Abstract Late Cenozoic lavas and associated hyaloclastite breccias of the Adare volcanics (Hallett volcanic province) in Robertson Bay, North Victoria Land rest unconformably on Paleozoic greywackes. Abundant hyaloclastite breccias are confined to a paleovalley; their primary geological features, an...
Other Authors: | |
---|---|
Format: | Text |
Language: | English |
Subjects: | |
Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.595.7862 http://pubs.usgs.gov/of/2007/1047/srp/srp045/of2007-1047srp045.pdf |
id |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.595.7862 |
---|---|
record_format |
openpolar |
spelling |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.595.7862 2023-05-15T18:42:52+02:00 The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.595.7862 http://pubs.usgs.gov/of/2007/1047/srp/srp045/of2007-1047srp045.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.595.7862 http://pubs.usgs.gov/of/2007/1047/srp/srp045/of2007-1047srp045.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://pubs.usgs.gov/of/2007/1047/srp/srp045/of2007-1047srp045.pdf text ftciteseerx 2016-01-08T13:43:51Z Abstract Late Cenozoic lavas and associated hyaloclastite breccias of the Adare volcanics (Hallett volcanic province) in Robertson Bay, North Victoria Land rest unconformably on Paleozoic greywackes. Abundant hyaloclastite breccias are confined to a paleovalley; their primary geological features, and the stable isotope ratios of secondary minerals, are consistent with eruption in a subaqueous environment with calcite formation probably involving seawater. In contrast, the lavas which stratigraphically overlie the hyaloclastites on Mayr Spur probably were erupted subaerially. K-Ar dating of eight samples from this basal sequence confirms the known older age limit (Late Miocene) of the Hallett volcanic province. Geochemical data reveal an ocean island basalt-like affinity, similar to other Cenozoic igneous rocks of the Hallett volcanic province. If a submarine eruptive paleoenvironment is accepted then there has been net tectonic or isostatic post-Late Miocene uplift of a few hundred metres in the Robertson Bay-Adare Peninsula area. Text Victoria Land Ocean Island Unknown Adare ENVELOPE(170.233,170.233,-71.283,-71.283) Adare Peninsula ENVELOPE(170.500,170.500,-71.500,-71.500) Hallett ENVELOPE(170.217,170.217,-72.317,-72.317) Robertson Bay ENVELOPE(170.000,170.000,-71.417,-71.417) Victoria Land |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
description |
Abstract Late Cenozoic lavas and associated hyaloclastite breccias of the Adare volcanics (Hallett volcanic province) in Robertson Bay, North Victoria Land rest unconformably on Paleozoic greywackes. Abundant hyaloclastite breccias are confined to a paleovalley; their primary geological features, and the stable isotope ratios of secondary minerals, are consistent with eruption in a subaqueous environment with calcite formation probably involving seawater. In contrast, the lavas which stratigraphically overlie the hyaloclastites on Mayr Spur probably were erupted subaerially. K-Ar dating of eight samples from this basal sequence confirms the known older age limit (Late Miocene) of the Hallett volcanic province. Geochemical data reveal an ocean island basalt-like affinity, similar to other Cenozoic igneous rocks of the Hallett volcanic province. If a submarine eruptive paleoenvironment is accepted then there has been net tectonic or isostatic post-Late Miocene uplift of a few hundred metres in the Robertson Bay-Adare Peninsula area. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.595.7862 http://pubs.usgs.gov/of/2007/1047/srp/srp045/of2007-1047srp045.pdf |
long_lat |
ENVELOPE(170.233,170.233,-71.283,-71.283) ENVELOPE(170.500,170.500,-71.500,-71.500) ENVELOPE(170.217,170.217,-72.317,-72.317) ENVELOPE(170.000,170.000,-71.417,-71.417) |
geographic |
Adare Adare Peninsula Hallett Robertson Bay Victoria Land |
geographic_facet |
Adare Adare Peninsula Hallett Robertson Bay Victoria Land |
genre |
Victoria Land Ocean Island |
genre_facet |
Victoria Land Ocean Island |
op_source |
http://pubs.usgs.gov/of/2007/1047/srp/srp045/of2007-1047srp045.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.595.7862 http://pubs.usgs.gov/of/2007/1047/srp/srp045/of2007-1047srp045.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766232639556026368 |