On the causes of O(super 18)-depletion and O(super 18)O(super 16) homogenization during regional metamorphism; the East Humboldt Range core complex, Nevada
Article Abstract:
The observations of the correlation between the degree of O(super 18)-depletion in metasedimentary rocks, O(super 18)O(super 16) homogenization between lithologies and the part of granitoids in any location of the section, are explained by the fluid-mediated exchange between granitoids and metasediment. This exchange occurs by convective recirculation of magnetic fluids on the scale of meters during granitoid crystallization. The generalized model for the isotopic evolution of the the East Humboldt Range core complex is effective to know the influencing factors of depletion and homogenization.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1995
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Imprint of meteoric water on the stable isotope compositions of igneous and secondary minerals, Kap Edvard Holm Complex, East Greenland
Article Abstract:
The hydrous minerals from the Eocene Kap Edvard Holm Complex of East Greenland constitute primary igneous hornblendes and phlogopites crystallized from partial melts of basaltic xenoliths, primary igneous hornblendes recrystallized from gabbroic cumulates and secondary actinolite, epidote and chlorite. The igneous or secondary minerals suffer considerable subsolidus isotopic equilibrium with meteoric-hydrothermal fluids. The isotopically light meteoric water at Kap Edvard Holm Complex is due to the local climate differences.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1995
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Oxygen and hydrogen isotope evidence for meteoric water infiltration during mylonitization and uplift in the Ruby Mountains-East Humboldt Range core complex, Nevada
Article Abstract:
A study was conducted to evaluate evidence for meteoric water infiltration during mylonitization. A stable isotope analysis of rocks and minerals exposed in the Ruby Mountains-East Humboldt Range core complex shows that such infiltration did occur. Meteoric water seeped into shear zone during mylonite formation and reached depths of 5 to 10 km below surface levels, while meteoric fluids were found even deeper at 70 meters below detachment fault.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1992
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