Dy/Dy*: Variations Arising from Mantle Sources and Petrogenetic Processes
نویسندگان
چکیده
منابع مشابه
Inferences about Magma Sources and Mantle Structure from Variations Of
Continental flood basalts and mid-ocean ridge (MOR) tholeiitic basalts have distinctly different 14 3 Ndf1 44 Nd which may permit a priori distinctwn between '"continental" and "oceanic" igneous rocks. Initial 14 3 NdJI 4 4 Nd of continental igneous rocks through time fall on a Sm/Nd evolution curve with chondritic REE abundance ratio. These observations indicate that many continental igneous r...
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The decay of 14?Sm to 143Nd allows 143Nd/•44Nd to be used to trace Sm/Nd fractionation in long time-scale geologic processes. •43Nd/•nnNd has been measured in terrestrial rock samples of different ages to establish the characteristics of Nd isotopic evolution in the crust and mantle. The evolution of •43Nd/lnnNd in the mantle indicates Sm/Nd essentially equal to that of chondrites, and implies ...
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This dissertation discusses the experimental results designed to constrain the processes of MORB generation. The main focus of this study is to investigate the location and the related processes of the transformation boundary from spinel to garnet peridotite facies at subsolidus conditions, because the presence of garnet in melting residues has significant influence to the conclusion drawn from...
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ژورنال
عنوان ژورنال: Journal of Petrology
سال: 2012
ISSN: 1460-2415,0022-3530
DOI: 10.1093/petrology/egs076