کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6438666 | 1638032 | 2014 | 50 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The sources and time-integrated evolution of diamond-forming fluids - Trace elements and isotopic evidence
ترجمه فارسی عنوان
منابع و زمان تکامل الماس تشکیل مایعات - عناصر ردیابی و شواهد ایزوتوپ
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
ژئوشیمی و پترولوژی
چکیده انگلیسی
There is a strong correspondence between fluids with relatively unradiogenic Sr isotopes and relatively low (La, Nd, Sm)/(Nb, Zr) and (Ba, Th)/(Nb) ratios. Sr isotopic enrichment is accompanied by an increase in these ratios. The least trace element enriched and most isotopically depleted fluids are from the high-Mg carbonatitic suite. Thus, HDFs could be derived from asthenospheric mantle as low degree melts that interact to varying degrees with an ancient, metasomatized, rutile- and phlogopite bearing, sub continental lithosphere mantle. The internal heterogeneity in the Sr isotopic ratios within a single diamond suite and even within single diamonds may indicate fluid-mixing processes. Such mixing may occur during migration through preferred mantle veins and may be affected by the small-scale geochemical variability within them.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Geochimica et Cosmochimica Acta - Volume 125, 15 January 2014, Pages 146-169
Journal: Geochimica et Cosmochimica Acta - Volume 125, 15 January 2014, Pages 146-169
نویسندگان
Ofra Klein-BenDavid, D. Graham Pearson, Geoff M. Nowell, Chris Ottley, John C.R. McNeill, Alla Logvinova, Nikolay V. Sobolev,