|کد مقاله||کد نشریه||سال انتشار||مقاله انگلیسی||ترجمه فارسی||نسخه تمام متن|
|1549007||997768||2008||6 صفحه PDF||سفارش دهید||دانلود رایگان|
Apatite is a characteristic mineral for the iron deposits in the Ningwu region. Apatite shows a range of δ13CPDB values from −9.6‰ to −0.6‰, and most of them with the δ13CPDB values distributed in a range of mantle carbon (i.e., −2‰ to −9‰), except for samples T-06-1 and J-06-3. Apatites in the Ningwu porphyry iron deposits yield a narrow variation range of 87Sr/86Sr values from 0.706326 to 0.707577, similar to those of the volcanic and subvolcanic rocks and higher than that of a typical mantle-derived magmatic apatite (i.e., about 0.7040), indicating that formation of the apatites was involved with crust material contamination. δ13CPDB and 87Sr/86Sr values of the apatite indicate a possible contribution of mantle-derived fluid and material to formation of the Ningwu porphyry iron deposits, supported by regional geology, regional gravities and geochemistry of the volcanic and subvolcanic rocks in the Ningwu region.
Journal: Progress in Natural Science - Volume 18, Issue 2, 10 February 2008, Pages 167–172