کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4697741 | 1351897 | 2010 | 18 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Quantitative mineral resource assessment of undiscovered PGE resources in Finland
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی اقتصادی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Quantitative mineral resource assessment of undiscovered PGE resources in Finland Quantitative mineral resource assessment of undiscovered PGE resources in Finland](/preview/png/4697741.png)
چکیده انگلیسی
Most of the known platinum group element (PGE) resources in Finland are in contact-type and reef-type deposits in 2.45 Ga mafic-ultramafic layered intrusions. These intrusions are also estimated to contain the majority of possibly existing, yet undiscovered PGE resources in Finland. The undiscovered Pt, Pd, Au, Ni, and Cu resources in contact-type and reef-type deposits were estimated down to 1000 m depth using a three-part quantitative assessment method. This included the delineation of 19 contact-type and 24 reef-type permissive tracts, the formulation of a grade-tonnage model for the contact-type deposits and a separate model for each reef-type tract, estimation of the number of undiscovered deposits for each permissive tract, and Monte Carlo simulation to estimate the frequency distributions of metal tonnages in the undiscovered deposits. The expected number of undiscovered contact-type deposits is 29 and that of reef-type deposits is 23. At the 50% probability level, the total undiscovered PGE resources of Finland are estimated to be at least 5600 t Pt, 12,000 t Pd, 430 t Au, 4.2 Mt Ni, and 5.7 Mt Cu. At the 90% probability level, the corresponding tonnages are 720 t Pt, 1700 t Pd, 59 t Au, 0.87 Mt Ni, and 0.91 Mt Cu. More than 80% of the Pt + Pd in the undiscovered resources are estimated to be in reef-type deposits. The known PGE resources in Finland are 259 t Pt + Pd in six contact-type deposits, plus 69 t Pt + Pd in the atypical Kevitsa deposit. These figures indicate that the presently known deposits account for approximately 2% of the total assessed PGE resources in Finland. They suggest that significant potential exists for the discovery of additional PGE resources in the country.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ore Geology Reviews - Volume 38, Issue 3, November 2010, Pages 270-287
Journal: Ore Geology Reviews - Volume 38, Issue 3, November 2010, Pages 270-287
نویسندگان
K. Rasilainen, P. Eilu, T. Halkoaho, M. Iljina, T. Karinen,