The age of the Earth‘s crust in the Northern Prince Charles Mountains (East Antarctica) as evidenced by zircon xenocrysts from Cretaceous alkaline-ultramafic rocks
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F20%3A00000105" target="_blank" >RIV/00025798:_____/20:00000105 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/abs/pii/S002449372030236X?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S002449372030236X?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.Lithos.2020.105599" target="_blank" >10.1016/j.Lithos.2020.105599</a>
Alternative languages
Result language
angličtina
Original language name
The age of the Earth‘s crust in the Northern Prince Charles Mountains (East Antarctica) as evidenced by zircon xenocrysts from Cretaceous alkaline-ultramafic rocks
Original language description
Cretaceous alkaline-ultramafic stocks in the northern Prince Charles Mountains (PCM) contain zircon xenocrysts entrained duringmagma ascent to the surface. These xenocrysts provide the only evidence for the age of the underlying crustal rocks in the area. The zircons display a range of ages fromca 2700Ma to ca 300–260Ma, with the most dominant ages of ca 900–800 Ma and ca 660–500 Ma. These data indicate that the presently exposed ca 1000–950 Ma metamorphic rocks in the northern PCM are underlain by other geological unit(s). The presence of ca 2700 Ma zircons indicates that a Neoarchaean component is present in the lower crust and that the presumed Proterozoic Rayner Province is not entirely composed of Proterozoic protoliths, but rather is a tectonic mixture of Neoarchaean and younger rocks. This finding questions a Cambrian (Kuunga-age) collisional suture running through the Ruker Province, which may thus be further south within the sub-ice terrain. Nevertheless, the presence of ca 900–800Ma and ca 600–500Ma zircons argue for more widespread post-1000Mametamorphic events than are observed at the surface. Ca 300–260 Ma zircons, which could not have been derived from any known crystalline rocks in this region, indicate within-crustal chambers parent to mafic dyke suites.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10505 - Geology
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Lithos
ISSN
0024-4937
e-ISSN
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Volume of the periodical
368-369
Issue of the periodical within the volume
September : 105599
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
13
Pages from-to
nestránkováno
UT code for WoS article
000541261600012
EID of the result in the Scopus database
2-s2.0-85085939792