کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5783581 | 1637957 | 2017 | 69 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ion microprobe analyses of carbon in Fe-Ni metal in iron meteorites and mesosiderites
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
ژئوشیمی و پترولوژی
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چکیده انگلیسی
Bulk carbon concentrations inferred from our ion probe data are 3-4Â ppm in IVA, IVB, and Tishomingo, which has IVB-like depletions of moderately volatile siderophiles. Published bulk carbon contents of IVA and IVB irons are >10 times higher suggesting contamination problems. Our ion probe analyses and observations of carbide and graphite show that bulk carbon decreases with decreasing germanium and other moderately volatile elements from group IAB, through IIAB and IIIAB, to group IVA and IVB. These trends may have been inherited from fractionated chondritic precursors, or may have been produced by impacts that caused volatile loss, separation of mantle from core material, and relatively rapid cooling of irons poor in volatiles and carbon.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Geochimica et Cosmochimica Acta - Volume 200, 1 March 2017, Pages 367-407
Journal: Geochimica et Cosmochimica Acta - Volume 200, 1 March 2017, Pages 367-407
نویسندگان
Joseph I. Goldstein, Gary R. Huss, Edward R.D. Scott,