Oxygen isotope cosmothermometer

Onuma, Naoki; Clayton, Robert N.; Mayeda, T. K.

doi:10.1016/0016-7037(72)90005-1

Cited by 104 publications

(30 citation statements)

References 37 publications

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“…The 60 18 value of this material is much more negative than any other meteoritic material [27] and in the range to be expected for a primary high-temperature condensate from a nebular gas. Marvin et_ al^.…”

Section: Properties Of the Early Condensatementioning

confidence: 66%

The composition and origin of the moon

Anderson

1973

Earth and Planetary Science Letters

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Section: Properties Of the Early Condensatementioning

confidence: 66%

The composition and origin of the moon

Anderson

1973

Earth and Planetary Science Letters

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“…MARVIN et al (1970) and LARIMER and ANDERS (1970) suggested that these aggregates were high-temperature condensates from the solar nebula based on their high concentrations of Ca, Al and Ti relative to Mg and Si. ONUMA et al (1972) have independently arrived at the same conclusion based on the oxygen isotopic composition of the white inclusions. GROSSMAN (1972) and GROSS-MAN and CLARK (1973) concluded that the mineral assemblages, textural relations and solid solution compositions of the minerals in the inclusions were formed in the solar nebula during high-temperature condensation processes.…”

Section: Introductionmentioning

confidence: 72%

Refractory trace elements in Ca-Al-rich inclusions in the Allende meteorite

Grossman

1973

Geochimica et Cosmochimica Acta

133

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Abstract-The condensation temperatures are calculated for a number of refractory trace metals from a gas of solar composition at 10e3 and 1O-4 atm. total pressure. Instrumental neutron activation analysis of C&Al-rich inclusions in the Allende carbonaceous chondrite reveals enrichments of 22.8 f 2.2 in the concentrations of Ir, SC and the rare earths relative to Cl chondrites. Such enrichments cannot be due to magmatic differentiation processes because of the marked differences in chemical behavior between Ir and SC, exhibited by their distributions in terrestrial igneous rocks and meteorites. All of these elements should have condensed from a cooling gas of solar composition above or within the range of condensation temperatures of the major mineral phases of the inclusions, which suggests that these inclusions are hightemperature condensates from the primitive solar nebula. Gas-dust fractionation of these materials may have been responsible for the depletion of refractory elements in the ordinary and enstatite chondrites relative to the carbonaceous chondrites.

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“…Equation (4) was derived from regression of experimental results for chlorite formed by alteration of biotite between 170-300~ (Cole, 1985), and from data for hydrous silicates condensed in meteorites at <300~ (Onuma et al, 1972). This equation is preferred over that of Wenner and Taylor (1971), which was derived from coexisting minerals in metasedimentary rocks.…”

Section: Oxygen-isotope Fractionation Factorsmentioning

confidence: 99%

Multiple Episodes of Clay Alteration at the Precambrian/Paleozoic Unconformity, Appalachian Basin: Isotopic Evidence for Long-Distance and Local Fluid Migrations

Ziegler

Longstaffe

2000

Clays and clay miner.

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Abstract--Chlorite and illite are commonly associated with ubiquitous secondary K-rich feldspar in the rocks located immediately above and below the Precambrian-Paleozoic unconformity in southwestern Ontario, and elsewhere in the mid-continent of North America. This alteration assemblage is attributed to long-distance migration of hot brines driven westward by orogenic processes originating along the eastern seaboard of North America. The ~D and 8180 values of chlorite and illite, plus K-Ar dates for secondary K-rich feldspar and illite, were used to determine the nature, origin, and timing of the fluids that altered Precambrian granites and their overlying rocks in southwestern Ontario. The ~80 values of the chlorite-forming fluids are best explained by initial hot brines (~ 150~ evolved mostly from seawater. Secondary K-rich feldspar formation followed shortly thereafter, as the fluids cooled and perhaps mixed with meteoric water. Regional migration of the brines was induced by Taconic orogenic events to the east. The hydrogen and oxygen isotopic compositions for the secondary illite of the early to mid-Carboniferous indicate its crystallization from local meteoric water at low temperatures (40-55~ Infiltration of local meteoric water into the Paleozoic and uppermost altered Precambrian rocks occurred during uplift, erosion, and subaerial exposure of local arches in southern Ontario. The local basement reactivation and associated secondary illite formation in this portion of the North American hinterland was likely a distal expression of east-coast Acadian and Alleghanian orogenic activity.

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Oxygen isotope cosmothermometer

Cited by 104 publications

References 37 publications

The composition and origin of the moon

The composition and origin of the moon

Refractory trace elements in Ca-Al-rich inclusions in the Allende meteorite

Multiple Episodes of Clay Alteration at the Precambrian/Paleozoic Unconformity, Appalachian Basin: Isotopic Evidence for Long-Distance and Local Fluid Migrations

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