Pyroxene geothermometry applied to a three-pyroxene achondrite from Allan Hills, Antarctica and ordinary chondrites.
نویسندگان
چکیده
منابع مشابه
Pyroxene Europium Valence Oxybarometer. Effects of Pyroxene Composition, Melt Composition and Crystallization Kinetics
Introduction: The behavior of multivalent elements such as iron, chromium, vanadium, and euro-pium in magmatic systems reflects the f O2 of the environment. The oxidation state of these elements will influence the mineral assemblage, crystallization sequence , and element partitioning[1]. The effect of f O2 on the relative proportions of divalent and trivalent Eu has proven to be a useful tool ...
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CHONDRITES. Alexander N. Krot, Mikhail I. Petaev, and Hisayoshi Yurimoto, Hawai'i Institute of Geophysics and Planetology, School of Ocean and Earth Science and Technology, University of Hawai'i at Manoa, Honolulu, HI 96822, USA ([email protected]); Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ([email protected]); Earth and Planetary Sciences, Tokyo Institute ...
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متن کاملAtmospheric composition 1 million years ago from blue ice in the Allan Hills, Antarctica.
Here, we present direct measurements of atmospheric composition and Antarctic climate from the mid-Pleistocene (∼1 Ma) from ice cores drilled in the Allan Hills blue ice area, Antarctica. The 1-Ma ice is dated from the deficit in (40)Ar relative to the modern atmosphere and is present as a stratigraphically disturbed 12-m section at the base of a 126-m ice core. The 1-Ma ice appears to represen...
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ژورنال
عنوان ژورنال: Mineralogical Journal
سال: 1979
ISSN: 1881-4174,0544-2540
DOI: 10.2465/minerj.9.460