Eclogitic metasediments from the Tso Morari area (Ladakh, Himalaya): evidence for continental subduction during India-Asia convergence
Article Abstract:
The HP-LT metamorphic and microstructural evolution of the metasediments from the Tso-Morari dome in Ladakh, Himalaya are studied. Results show a HP-LT evolution with peak metamorphic conditions of about 20 +/- 2kbar and 500 +/- 50 degrees Centigrade followed by a stage of eclogite-blueschist facies retrogression and heating by 630 +/- 30 degrees Centigrade at amphibolite facies. It is also argued that the Tso Morari massif can be considered a north Himalayan massif.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1997
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Strontium and oxygen isotope profiles across marble-silicate contacts, Lizzies Basin, East Humboldt Range, Nevada: constraints on metamorphic permeability contrasts and fluid flow
Article Abstract:
The oxygen isotopes (O) move to a greater distance in the silicate than in the marble rocks of the Lizzies Basin, East Humboldt Range, Nevada. The strontium isotope (Sr) moves about the same distance in both types of rocks. This is probably due to a difference in the porosity of the silicate rocks or different diffusion rates of the isotopes. Details of the isotope profiles across the marble to calc-silicate contacts are given.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1995
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Oxygen and carbon isotope profiles in metasediments from Lizzies Basin, EastHumboldt Range, Nevada: constraints on mid-crustal metamorphic and magmatic volatile fluxes
Article Abstract:
An analysis of oxygen and carbon isotope ratios in metasediments is presented. The metasediments are taken from the Lizzies Basin, which is the deepest structural level exposed for the East Humboldt Range metamorphic formation. It is shown that 18O/16O ratios varied systematically in the studied formation. In addition, exchange with CO2-H2O fluids changed the isotopic composition of oxygen and carbon elements.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1992
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