Rare earth geochemistry of the Troodos ophiolite complex
Journal Article
·
· J. Geophys. Res.; (United States)
- Columbia Univ., Palisades, NY
new chemical analyses of rocks from the Troodos ophiolite complex offer no clear evidence that it is a piece of oceanic crust. Ratios of selected nonlabile elements (REE, Zr, Ti) in Troodos lavas clearly distinguish them from the calc-alkaline lavas of evolved island arcs and the oceanic island basalts of Hawaiian and Icelandic type. However, these ratios are equivocal in assigning Troodos lavas to either oceanic ridge, small ocean basin, or young island arc magma series. Gabbros and quartz diorites from the Troodos plutonic complex appear to be derived by low-pressure crystal settling from magmas with the same REE pattern as the overlying lavas and dike rocks. The acidic plutonic rocks have large negative Eu anomalies that clearly distinguish them from silicified lavas in the complex, which have only small Eu anomalies. Harzburgite, the lowest plutonic unit, has a very low REE content and probably is residual mantle from which the basalt fraction has been removed.
- OSTI ID:
- 6296150
- Journal Information:
- J. Geophys. Res.; (United States), Journal Name: J. Geophys. Res.; (United States) Vol. 81:5; ISSN JGREA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Uranium-lead isotopic ages of plagiogranites from the Troodos ophiolite, Cyprus, and their tectonic significance
Preston Peak ophiolite, Klamath mountains, California, an immature island arc: petrochemical evidence
Structure and tectonics of a Lower Ordovician forearc ophiolite in central western Maine
Journal Article
·
Tue Sep 01 00:00:00 EDT 1987
· Geology; (United States)
·
OSTI ID:5334802
Preston Peak ophiolite, Klamath mountains, California, an immature island arc: petrochemical evidence
Book
·
Fri Dec 31 23:00:00 EST 1976
·
OSTI ID:6378899
Structure and tectonics of a Lower Ordovician forearc ophiolite in central western Maine
Conference
·
Sun Feb 28 23:00:00 EST 1993
· Geological Society of America, Abstracts with Programs; (United States)
·
OSTI ID:5806960
Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104 -- Spectral Procedures-- (-1987)
58 GEOSCIENCES
580400* -- Geochemistry-- (-1989)
CHEMICAL ANALYSIS
CHEMISTRY
DATA
ELEMENTS
EXPERIMENTAL DATA
GEOCHEMISTRY
GEOLOGIC FORMATIONS
IGNEOUS ROCKS
INFORMATION
ISOTOPE APPLICATIONS
ISOTOPE DILUTION
MASS SPECTROSCOPY
METALS
NONDESTRUCTIVE ANALYSIS
NUMERICAL DATA
POWDERS
QUANTITATIVE CHEMICAL ANALYSIS
RARE EARTHS
ROCKS
SPECTROSCOPY
TRACE AMOUNTS
TRACER TECHNIQUES
X-RAY EMISSION ANALYSIS
X-RAY FLUORESCENCE ANALYSIS
400104 -- Spectral Procedures-- (-1987)
58 GEOSCIENCES
580400* -- Geochemistry-- (-1989)
CHEMICAL ANALYSIS
CHEMISTRY
DATA
ELEMENTS
EXPERIMENTAL DATA
GEOCHEMISTRY
GEOLOGIC FORMATIONS
IGNEOUS ROCKS
INFORMATION
ISOTOPE APPLICATIONS
ISOTOPE DILUTION
MASS SPECTROSCOPY
METALS
NONDESTRUCTIVE ANALYSIS
NUMERICAL DATA
POWDERS
QUANTITATIVE CHEMICAL ANALYSIS
RARE EARTHS
ROCKS
SPECTROSCOPY
TRACE AMOUNTS
TRACER TECHNIQUES
X-RAY EMISSION ANALYSIS
X-RAY FLUORESCENCE ANALYSIS