Drilling investigation of a young magmatic intrusion beneath Inyo Dome, Long Valley Caldera, California. Progress report
Progress to date indicates: (1) the conduit and lava flow at Obsidian Dome consist of two magma types; (2) the more mafic magma occurs at the base of Obsidian Dome and at the margins of the conduit and was emplaced first; (3) the more silicic magma occurs in the center of the conduit and in the dike; (4) the ilmenite-magnetite and orthopyroxene-augite geothermometers have not reequilibrated in the conduit or dike; (5) the more mafic magma's emplacement temperature was 974/sup 0/C compared to the silicic magma's 951/sup 0/C; and (6) trace elements are characteristic of each magma type. (ACR)
- Research Organization:
- Michigan State Univ., East Lansing (USA). Dept. of Geological Sciences
- DOE Contract Number:
- FG02-85ER13321
- OSTI ID:
- 5215425
- Report Number(s):
- DOE/ER/13321-1; ON: DE86001134
- Country of Publication:
- United States
- Language:
- English
Similar Records
Petrology and emplacement dynamics of the intrusive and extrusive rhyolites of Obsidian Dome Inyo Craters volcanic chain, eastern California
Drilling investigations of a young magmatic intrusion beneath Inyo domes, Long Valley Caldera, California: The effects of pressure, volatiles, and thermal history on chemical heterogeneity in magma systems: Final report
Drilling investigation of a young magmatic intrusion beneath the Inyo Domes, Long Valley, California: Structural and textural studies:
Technical Report
·
Sat Dec 31 23:00:00 EST 1988
·
OSTI ID:5727534
Drilling investigations of a young magmatic intrusion beneath Inyo domes, Long Valley Caldera, California: The effects of pressure, volatiles, and thermal history on chemical heterogeneity in magma systems: Final report
Technical Report
·
Mon Sep 28 00:00:00 EDT 1987
·
OSTI ID:6025692
Drilling investigation of a young magmatic intrusion beneath the Inyo Domes, Long Valley, California: Structural and textural studies:
Technical Report
·
Sat Oct 31 23:00:00 EST 1987
·
OSTI ID:5237293
Related Subjects
15 GEOTHERMAL ENERGY
150201 -- Geology & Hydrology of Geothermal Systems-- USA-- (-1989)
58 GEOSCIENCES
580202* -- Geophysics-- Volcanology-- (1980-1989)
CALDERAS
CALIFORNIA
CHEMICAL COMPOSITION
FEDERAL REGION IX
GEOTHERMOMETRY
Geothermal Legacy
INTRUSION
LITHOLOGY
LONG VALLEY
MAGMA
NORTH AMERICA
USA
150201 -- Geology & Hydrology of Geothermal Systems-- USA-- (-1989)
58 GEOSCIENCES
580202* -- Geophysics-- Volcanology-- (1980-1989)
CALDERAS
CALIFORNIA
CHEMICAL COMPOSITION
FEDERAL REGION IX
GEOTHERMOMETRY
Geothermal Legacy
INTRUSION
LITHOLOGY
LONG VALLEY
MAGMA
NORTH AMERICA
USA