Journal ArticleDOI
Crustal growth and mantle evolution: inferences from models of element transport and Nd and Sr isotopes
TLDR
In this paper, a model of continental crust extraction from a uniform depleting mantle with crustal recycling is presented. But the model does not support a steady-state model for the crust.About:
This article is published in Geochimica et Cosmochimica Acta.The article was published on 1980-08-01. It has received 260 citations till now. The article focuses on the topics: Crustal recycling & Oceanic crust.read more
Citations
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The Lu-Hf isotope geochemistry of chondrites and the evolution of the mantle-crust system
TL;DR: In this paper, the authors obtained a new set of present-day mean values in chondrites of176Hf/177Hf = 0.282772 ± 29 and176Lu/177 Hf= 0.0332 ± 2.
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Major and trace element composition of the depleted MORB mantle (DMM)
R. Workman,Stanley R. Hart +1 more
TL;DR: Asimow et al. as mentioned in this paper derived an estimate for the chemical composition of the depleted MORB mantle (DMM), the source reservoir to mid-ocean ridge basalts (MORBs), which represents at least 30% the mass of the whole silicate Earth.
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A large-scale isotope anomaly in the Southern Hemisphere mantle
TL;DR: The authors showed that the isotopic mantle anomaly is globe-encircling in extent, centred on latitude 30° S. They also showed that this mantle anomaly has been in existence for billions of years and placed severe constraints on mantle convection models.
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Neodymium isotopes in the Colorado Front Range and crust–mantle evolution in the Proterozoic
TL;DR: In this article, an empirical model is constructed that may provide accurate crust-formation ages f or rocks of all ages, based on the isotopic data of major rock types of the basement underlying the Rocky Mountains in Colorado.
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Nb and Pb in oceanic basalts: new constraints on mantle evolution
TL;DR: In this paper, the authors proposed a new constraint on mantle composition: the differentiated part of the mantle, chemically depleted after separation of the major portion of the continental crust, was subsequently internally rehomogenized.
References
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Geochemistry of Hydrothermal Ore Deposits
TL;DR: In this paper, Skinner et al. discuss the relationship between hydrous alteration and its relationship to hydrous fluid composition in the formation of sulfide-sulfide ores.
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Nd isotopic variations and petrogenetic models
TL;DR: In this article, the authors analyzed the geochemical properties of a chondritic reservoir with high Fe, high Fe basalt, Ti basalt and alkali basalts and compared the results with the present value of the source regions of the earth.
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An oxygen isotope profile in a section of Cretaceous oceanic crust, Samail Ophiolite, Oman: Evidence for δ18O buffering of the oceans by deep (>5 km) seawater-hydrothermal circulation at mid-ocean ridges
Robert T. Gregory,Hugh P. Taylor +1 more
TL;DR: In this paper, isotopic analyses of 75 samples from the Samail ophiolite indicate that pervasive subsolidus hydrothermal exchange with seawater occurred throughout the upper 75% of this 8 km-thick oceanic crustal section; locally, the H_2O even penetrated down into the tectonized peridotite.
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Sm-Nd and Rb-Sr Chronology of Continental Crust Formation
TL;DR: It has been possible to determine the mean age of sediment provenances, as studies of sedimentary rocks suggest that the samarium-neodymium isotopic system is not substantially disturbed during sedimentation or diagenesis.