ZIRCONIUM IN ALKALINE DYKES FROM THE TUGTUTÖQ REGION, SOUTH GREENLAND
Zr values are reported for 30 alkaline dykes from the Tugtutoq area, South Greenland. Concentrations increase in the fractionation series trachydolerite'-» • aegirine microgranite to a maximum of 7175 p.p.m., hut it is not yet clear how Zr is distributed between the various mine-rals in the sil...
Main Authors: | , |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Subjects: | |
Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.545.7351 http://2dgf.dk/xpdf/bull20-01-59-63.pdf |
id |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.545.7351 |
---|---|
record_format |
openpolar |
spelling |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.545.7351 2023-05-15T16:27:39+02:00 ZIRCONIUM IN ALKALINE DYKES FROM THE TUGTUTÖQ REGION, SOUTH GREENLAND Raymond Macdonald A. Parker The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.545.7351 http://2dgf.dk/xpdf/bull20-01-59-63.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.545.7351 http://2dgf.dk/xpdf/bull20-01-59-63.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://2dgf.dk/xpdf/bull20-01-59-63.pdf text ftciteseerx 2016-01-08T11:16:50Z Zr values are reported for 30 alkaline dykes from the Tugtutoq area, South Greenland. Concentrations increase in the fractionation series trachydolerite'-» • aegirine microgranite to a maximum of 7175 p.p.m., hut it is not yet clear how Zr is distributed between the various mine-rals in the silicic dykes. The rocks occur as swarms of dykes of Gardar age intruded into basement granites some 1150 m years ago (Bridgwater, 1965). The geological setting and details of the igneous activity have been given by Upton (1962, 1964a), while Macdonald (1969) has described the petrology of the dykes, giving 33 rock-analyses. Macdonald & Edge (1970) have presented data for F, Cl, Rb, Sr, Ba, Sc, Y, La, Ce, Nb, Cr, Cu, Ga and Pb in the analysed speci-mens. The dykes form a series from trachydolerites through hastingsite- and riebeckite-microsyenites to devitrified microgranites and rhyolites. Though the dykes are thought to represent the products of the extreme fractionation of alkali basalt magma, the compositions of the acid types have been modified by devitrification, resulting in a loss of Na (and to a lesser extent Text Greenland Unknown Greenland |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
description |
Zr values are reported for 30 alkaline dykes from the Tugtutoq area, South Greenland. Concentrations increase in the fractionation series trachydolerite'-» • aegirine microgranite to a maximum of 7175 p.p.m., hut it is not yet clear how Zr is distributed between the various mine-rals in the silicic dykes. The rocks occur as swarms of dykes of Gardar age intruded into basement granites some 1150 m years ago (Bridgwater, 1965). The geological setting and details of the igneous activity have been given by Upton (1962, 1964a), while Macdonald (1969) has described the petrology of the dykes, giving 33 rock-analyses. Macdonald & Edge (1970) have presented data for F, Cl, Rb, Sr, Ba, Sc, Y, La, Ce, Nb, Cr, Cu, Ga and Pb in the analysed speci-mens. The dykes form a series from trachydolerites through hastingsite- and riebeckite-microsyenites to devitrified microgranites and rhyolites. Though the dykes are thought to represent the products of the extreme fractionation of alkali basalt magma, the compositions of the acid types have been modified by devitrification, resulting in a loss of Na (and to a lesser extent |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Raymond Macdonald A. Parker |
spellingShingle |
Raymond Macdonald A. Parker ZIRCONIUM IN ALKALINE DYKES FROM THE TUGTUTÖQ REGION, SOUTH GREENLAND |
author_facet |
Raymond Macdonald A. Parker |
author_sort |
Raymond Macdonald |
title |
ZIRCONIUM IN ALKALINE DYKES FROM THE TUGTUTÖQ REGION, SOUTH GREENLAND |
title_short |
ZIRCONIUM IN ALKALINE DYKES FROM THE TUGTUTÖQ REGION, SOUTH GREENLAND |
title_full |
ZIRCONIUM IN ALKALINE DYKES FROM THE TUGTUTÖQ REGION, SOUTH GREENLAND |
title_fullStr |
ZIRCONIUM IN ALKALINE DYKES FROM THE TUGTUTÖQ REGION, SOUTH GREENLAND |
title_full_unstemmed |
ZIRCONIUM IN ALKALINE DYKES FROM THE TUGTUTÖQ REGION, SOUTH GREENLAND |
title_sort |
zirconium in alkaline dykes from the tugtutöq region, south greenland |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.545.7351 http://2dgf.dk/xpdf/bull20-01-59-63.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
http://2dgf.dk/xpdf/bull20-01-59-63.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.545.7351 http://2dgf.dk/xpdf/bull20-01-59-63.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766017112801804288 |