Magmatic epidote and its petrologic significance
Journal Article
·
· Geology; (United States)
Epidote is a major magmatic mineral in tonalite and granodiorite in a belt coextensive with the Mesozoic accreted terranes between northern California and southeastern Alaska. Textural and chemical evidence indicates that epidote crystallized as a relatively late but magmatic mineral that formed through reaction with hornblende in the presence of a melt phase. The observed relations concur with experimental data on crystallization of epidote from synthetic granodiorite at 8 kbar total pressure. Plutonic rocks bearing magmatic epidote must have formed under moderately high pressures, corresponding to lower crustal depths, under fairly oxidizing conditions. 23 references, 3 figures, 1 table.
- Research Organization:
- Ge,logical Survey, Reston, VA
- OSTI ID:
- 6701262
- Journal Information:
- Geology; (United States), Journal Name: Geology; (United States) Vol. 12:9; ISSN GLGYB
- Country of Publication:
- United States
- Language:
- English
Similar Records
Petrology and geobarometry of Admiralty-Revillagigedo belt granitoids near Petersburg, southeastern Alaska
Overview of granitic rocks in the Bradfield Canal area, southeastern Alaska
Major intra-arc crustal loading and its tectonic implications, North Cascades crystalline core, Washington and British Columbia
Conference
·
Wed Mar 31 23:00:00 EST 1993
· Geological Society of America, Abstracts with Programs; (United States)
·
OSTI ID:5099237
Overview of granitic rocks in the Bradfield Canal area, southeastern Alaska
Conference
·
Wed Mar 31 23:00:00 EST 1993
· Geological Society of America, Abstracts with Programs; (United States)
·
OSTI ID:5098593
Major intra-arc crustal loading and its tectonic implications, North Cascades crystalline core, Washington and British Columbia
Conference
·
Tue Dec 31 23:00:00 EST 1991
· Geological Society of America, Abstracts with Programs; (United States)
·
OSTI ID:5973611
Related Subjects
58 GEOSCIENCES
580400* -- Geochemistry-- (-1989)
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM SILICATES
CALCIUM COMPOUNDS
CALCIUM SILICATES
CHEMICAL REACTION KINETICS
CHEMISTRY
CRYSTAL GROWTH
CRYSTALLIZATION
EPIDOTES
GEOCHEMISTRY
IGNEOUS ROCKS
IRON COMPOUNDS
IRON SILICATES
KINETICS
MAGMATISM
METAMORPHIC ROCKS
MINERALS
ORIGIN
OXYGEN COMPOUNDS
PETROCHEMISTRY
PETROGENESIS
PHASE TRANSFORMATIONS
PLUTONIC ROCKS
REACTION KINETICS
ROCKS
SILICATE MINERALS
SILICATES
SILICON COMPOUNDS
SOLIDIFICATION
TRANSITION ELEMENT COMPOUNDS
580400* -- Geochemistry-- (-1989)
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM SILICATES
CALCIUM COMPOUNDS
CALCIUM SILICATES
CHEMICAL REACTION KINETICS
CHEMISTRY
CRYSTAL GROWTH
CRYSTALLIZATION
EPIDOTES
GEOCHEMISTRY
IGNEOUS ROCKS
IRON COMPOUNDS
IRON SILICATES
KINETICS
MAGMATISM
METAMORPHIC ROCKS
MINERALS
ORIGIN
OXYGEN COMPOUNDS
PETROCHEMISTRY
PETROGENESIS
PHASE TRANSFORMATIONS
PLUTONIC ROCKS
REACTION KINETICS
ROCKS
SILICATE MINERALS
SILICATES
SILICON COMPOUNDS
SOLIDIFICATION
TRANSITION ELEMENT COMPOUNDS