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Title: Carbon isotopes in xenoliths from the Hualalai Volcano, Hawaii, and the generation of isotopic variability

Abstract

The isotopic composition of carbon has been determined in a suite of xenoliths from lava of the 1800-1801 Kaupulehu eruption of Hualalai Volcano, Hawaii. Several lithologies are represented in the suite, including websterite, dunite, wehrlite, pyroxenite, and gabbro. In addition, there are composite xenoliths in which contacts between lithologies are preserved. Most of the xenoliths represent deformed cumulates. The contact relations in the composite samples indicate that the lithologies originated from the same source region, which, based on pressures determined from fluid inclusions, is estimated to be at a depth of {approx}20 km, or near the crust-mantle boundary. The observations and isotopic results demonstrate that isotopic variability can be generated by multistage fractionation processes such as degassing of CO{sub 2} from magma and precipitation of CO{sub 2}-rich fluids to form graphitic compounds. Such processes operated over regions the scales of which were determined by style and intensity of deformation and by lithology.

Authors:
 [1];  [2]
  1. Univ. de Paris (France)
  2. American Museum of Natural History, New York (USA)
Publication Date:
OSTI Identifier:
6692265
Resource Type:
Journal Article
Journal Name:
Geochimica et Cosmochimica Acta; (USA)
Additional Journal Information:
Journal Volume: 54:1; Journal ID: ISSN 0016-7037
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; INCLUSIONS; GEOCHEMISTRY; MINERALOGY; VOLCANIC ROCKS; PETROGENESIS; CARBON COMPOUNDS; CARBON DIOXIDE; CARBON ISOTOPES; DEGASSING; FRACTIONATION; HAWAII; ISOTOPE RATIO; LAVA; LITHOLOGY; VARIATIONS; VOLCANOES; CARBON OXIDES; CHALCOGENIDES; CHEMISTRY; FEDERAL REGION IX; IGNEOUS ROCKS; ISOTOPES; NORTH AMERICA; OXIDES; OXYGEN COMPOUNDS; ROCKS; SEPARATION PROCESSES; USA; 580000* - Geosciences

Citation Formats

Pineau, F, and Mathez, E A. Carbon isotopes in xenoliths from the Hualalai Volcano, Hawaii, and the generation of isotopic variability. United States: N. p., 1990. Web. doi:10.1016/0016-7037(90)90209-4.
Pineau, F, & Mathez, E A. Carbon isotopes in xenoliths from the Hualalai Volcano, Hawaii, and the generation of isotopic variability. United States. https://doi.org/10.1016/0016-7037(90)90209-4
Pineau, F, and Mathez, E A. 1990. "Carbon isotopes in xenoliths from the Hualalai Volcano, Hawaii, and the generation of isotopic variability". United States. https://doi.org/10.1016/0016-7037(90)90209-4.
@article{osti_6692265,
title = {Carbon isotopes in xenoliths from the Hualalai Volcano, Hawaii, and the generation of isotopic variability},
author = {Pineau, F and Mathez, E A},
abstractNote = {The isotopic composition of carbon has been determined in a suite of xenoliths from lava of the 1800-1801 Kaupulehu eruption of Hualalai Volcano, Hawaii. Several lithologies are represented in the suite, including websterite, dunite, wehrlite, pyroxenite, and gabbro. In addition, there are composite xenoliths in which contacts between lithologies are preserved. Most of the xenoliths represent deformed cumulates. The contact relations in the composite samples indicate that the lithologies originated from the same source region, which, based on pressures determined from fluid inclusions, is estimated to be at a depth of {approx}20 km, or near the crust-mantle boundary. The observations and isotopic results demonstrate that isotopic variability can be generated by multistage fractionation processes such as degassing of CO{sub 2} from magma and precipitation of CO{sub 2}-rich fluids to form graphitic compounds. Such processes operated over regions the scales of which were determined by style and intensity of deformation and by lithology.},
doi = {10.1016/0016-7037(90)90209-4},
url = {https://www.osti.gov/biblio/6692265}, journal = {Geochimica et Cosmochimica Acta; (USA)},
issn = {0016-7037},
number = ,
volume = 54:1,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 1990},
month = {Mon Jan 01 00:00:00 EST 1990}
}