Birthdate for the Iapetus Ocean A precise U-Pb zircon and baddeleyite age for the Long Range dikes, southeast Labrador
Journal Article
·
· Geology; (USA)
- Royal Ontario Museum, Toronto (Canada)
- Newfoundland Department of Mines and Energy (Canada)
Mafic dike swarms represent direct evidence of early tensional environments that may have eventually led to ocean formation. The first precise U-Pb zircon and baddeleyite age of 615 {plus minus} 2 Ma for a Long Range dike, southeastern Labrador, could mark the beginning of Iapetus Ocean formation. Baddeleyite (ZrO{sub 2}) is more widespread than previously recognized. It is ideal for use with the U-Pb system because it has low initial common lead and sufficient uranium levels, and it does not lose significant radiogenic lead with time. Baddeleyite therefore provides a unique opportunity for dating dikes associated with rift-related events with unprecedented accuracy.
- OSTI ID:
- 7254093
- Journal Information:
- Geology; (USA), Journal Name: Geology; (USA) Vol. 17:7; ISSN GLGYB; ISSN 0091-7613
- Country of Publication:
- United States
- Language:
- English
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OSTI ID:5421279
U-Pb and Sm-Nd ages for the Stillwater Complex and its associated sills and dikes, Beartooth Mountains, Montana: Identification of a parent magma
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OSTI ID:6120042
Related Subjects
58 GEOSCIENCES
580000* -- Geosciences
ACTINIDES
AGE ESTIMATION
ALKALI METALS
ARGON
BADDELEYITE
CANADA
CHALCOGENIDES
DIKES
ELEMENTS
FLUIDS
GASES
GEOLOGIC HISTORY
GEOLOGIC STRUCTURES
HAFNIUM COMPOUNDS
HAFNIUM OXIDES
ISOTOPE DATING
LEAD
MATERIALS
METALS
MINERALS
NONMETALS
NORTH AMERICA
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
POTASSIUM
RADIOACTIVE MATERIALS
RADIOACTIVE MINERALS
RARE GASES
REFRACTORY METAL COMPOUNDS
SEAS
SILICATE MINERALS
SILICATES
SILICON COMPOUNDS
SURFACE WATERS
TRANSITION ELEMENT COMPOUNDS
URANIUM
ZIRCON
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES
ZIRCONIUM SILICATES
580000* -- Geosciences
ACTINIDES
AGE ESTIMATION
ALKALI METALS
ARGON
BADDELEYITE
CANADA
CHALCOGENIDES
DIKES
ELEMENTS
FLUIDS
GASES
GEOLOGIC HISTORY
GEOLOGIC STRUCTURES
HAFNIUM COMPOUNDS
HAFNIUM OXIDES
ISOTOPE DATING
LEAD
MATERIALS
METALS
MINERALS
NONMETALS
NORTH AMERICA
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
POTASSIUM
RADIOACTIVE MATERIALS
RADIOACTIVE MINERALS
RARE GASES
REFRACTORY METAL COMPOUNDS
SEAS
SILICATE MINERALS
SILICATES
SILICON COMPOUNDS
SURFACE WATERS
TRANSITION ELEMENT COMPOUNDS
URANIUM
ZIRCON
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES
ZIRCONIUM SILICATES