پیمان افضل
استادیار، گروه مهندسی معدن، دانشگاه آزاد اسلامی، واحد تهران جنوب، تهران، ایران
[ 1 ] - جدایش و دسته‌بندی رگه‌ها از دیدگاه عیاری با استفاده از روش فرکتالی عیار- حجم در کانسار طلای قلقله کردستان
امروزه تفکیک و شناسایی رگه‌های پرعیار از کم‌عیار در کانسارهای رگه‌ای از اهمیت فراوانی برخوردار است. این امر به‌ویژه در مورد کانسارهای رگه‌ای طلا که تغییرات عیار درحد بسیار ناچیز هم در خور توجه است، از ضرویات مهم و غیر قابل چشم‌پوشی در اکتشاف و تخمین ذخایر این نوع کانسارها به حساب می‌آید. در این پژوهش، از روش فرکتالی عیار- حجم در تفکیک رگه‌های پرعیار از کم عیار در کانسار طلای رگه‌ای قلقله کردست...
[ 2 ] - Application of fractal modeling and PCA method for hydrothermal alteration mapping in the Saveh area (Central Iran) based on ASTER multispectral data
The aim of this study is determination and separation of alteration zones using Concentration-Area (C-A) fractal model based on remote sensing data which has been extracted from Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) images. The studied area is on the SW part of Saveh, 1:250,000 geological map, which is located in Urumieh-Dokhtar magmatic belt, Central Iran. The ...
[ 3 ] - Determination of a Conceptual Model for the Structural Features and Pb–Zn Mineralization in the North of Behabad Fault Zone, Central Iran
The Behabad region is located within a tectono–sedimentary zone in southeast Yazd province, Central Iran. The tectonic activities have deformed and faulted the Mesozoic and Quaternary formations in this area. The faults in Kuhbanan and Behabad have played a key role in the evolution of geological events, mineralization, and the formation of Behabad–Kuhbanan horst. These faults have separated th...
[ 4 ] - Application of multifractal modeling for separation of sulfidic mineralized zones based on induced polarization and resistivity data in the Ghare-Tappeh Cu deposit, NW Iran
The aim of this study was to identify various sulfidic mineralized zones in the Ghare-Tappeh Cu deposit (NW Iran) based on geo-electrical data including induced polarization (IP) and resistivity (RS) using the concentration-volume (C-V) and number-size (N-S) fractal models. The fractal models were used to separate high and moderate sulfidic zones from low sulfidic zones and barren wall rocks. B...
[ 5 ] - Determination of geochemical anomalies and gold mineralized stages based on litho-geochemical data for Zarshuran Carlin-like gold deposit (NW Iran) utilizing multi-fractal modeling and stepwise factor analysis
The Zarshuran Carlin-like gold deposit is located at the Takab Metallogenic belt in the northern part of the Sanandaj-Sirjan zone, NW Iran. The high-grade ore bodies are mainly hosted by black shale and cream to gray massive limestone along the NNE-trending extensional fault/fracture zones. The aim of this investigation was to determine and separate the gold mineralized stages based on the surf...
[ 6 ] - ارتباط کانه زایی عنصرآهن با ساختارهای خطی پی سنگی، به کمک مدل های فرکتالی چندگانه در منطقه بافق، ایران مرکزی
مدل‌های چند فرکتالی به عنوان ابزارهایی موثر برای تفکیک واحدهای زمین‌شناسی و نواحی کانه‌زایی از زمینه در سال‌های اخیر استفاده شده است. در این مطالعه، مدل فرکتالی عیار- فاصله از ساختارهای گسلی اصلی (C-DMF) ارایه و توزیع معادن آهن شناخته‌شده در منطقه بافق برای یافتن سیمای کانه‌زایی آهن با توجه به فاصله از گسل‌های پی‌سنگی، گسل‌های سطحی و درزه‌های اصلی بر اساس اطلاعات دورسنجی، ژئوفیزیک هوابردی و پیم...
[ 7 ] - Characterization of rare earth elements by coupling multivariate analysis, factor analysis, and geostatistical simulation; case-study of Gazestan deposit, central Iran
The traditional approaches of modeling and estimation of highly skewed deposits have led to incorrect evaluations, creating challenges and risks in resource management. The low concentration of the rare earth element (REE) deposits, on one hand, and their strategic importance, on the other, enhances the necessity of multivariate modeling of these deposits. The wide variations of the grades and ...
[ 8 ] - Detection of Main Rock Type for Rare Earth Elements (REEs) Mineralization Using Staged Factor and Fractal Analysis in Gazestan Iron-Apatite Deposit, Central Iran
Gazestan magnetite-apatite deposit is located in Central Iran and Bafq region, which has been occurred in form of veins, veinlets, and small apatite lenses as well as magnetite in metasomatic rock types such as green chlorite-actinolite rock units. These rocks are situated in the carbonate-volcanic complex of Upper Precambrian-Lower Cambrian Rizo formation. In this study, staged factor analysis...
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