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آشکار سازی آنومالی های عناصر فلزی ناحیه بالوقیه به روش دورسنجی و مقایسه نتایج با داده های ژئوشیمی | ||
نشریه مهندسی منابع معدنی | ||
مقاله 1، دوره 6، شماره 4 - شماره پیاپی 22، دی 1400، صفحه 1-26 اصل مقاله (2.8 M) | ||
نوع مقاله: علمی-پژوهشی | ||
شناسه دیجیتال (DOI): 10.30479/jmre.2021.13287.1411 | ||
نویسندگان | ||
توحید نوری* 1؛ بابک بیگلری2؛ احمد آریافر3 | ||
1استادیار، دانشکده فنی و مهندسی، دانشگاه محقق اردبیلی، اردبیل | ||
2دانشجوی کارشناسی ارشد، گروه مهندسی معدن، دانشکده مهندسی، دانشگاه بیرجند، بیرجند | ||
3دانشیار، گروه مهندسی معدن، دانشکده مهندسی، دانشگاه بیرجند، بیرجند | ||
تاریخ دریافت: 25 اردیبهشت 1399، تاریخ بازنگری: 21 دی 1399، تاریخ پذیرش: 27 دی 1399 | ||
چکیده | ||
کانسارهای فلزی جایگاه ویژهای در میان منابع معدنی دارند و برای شناسایی آنها مطالعات فراوانی انجام شده که اغلب با تلفیق نتایج حاصل از روشهای مختلف اقدام به شناسایی هرچه بهتر این کانسارها شده است. در این بین میتوان به مطالعات دورسنجی و ژئوشیمیایی اشاره کرد که نقش عمدهای در به نقشه درآوردن آلتراسیونهای سطحی مرتبط با کانسارهای فلزی داشتهاند. محدوده شمال غرب ایران با داشتن معادن فلزی فعال و تعداد زیادی از ذخایر بالقوه جزو مناطق مستعد از نظر ذخیرههای فلزی است. یکی از مناطق مورد توجه برای مطالعات اکتشافی در شمال غرب ایران، منطقه بالوقیه است که منطقه مورد مطالعه در این تحقیق است. در این مطالعه ابتدا اجزای خالص یا اعضای انتهایی با استفاده از روش شاخص خلوص پیکسل استخراج شده و با طیفهای استاندارد USGS مقایسه شدند. بعد از تخمین فراوانی اعضای انتهایی با استفاده از روش فیلترینگ تطبیق یافته، نقشه کلاسبندی یا پراکندگی کانیها با اجرای تکنیکی جدید به نام ترشولد شناور بر روی نقشههای فراوانی اعضای انتهایی تعیین گردید. با این روش که از اطلاعات کانیشناسی منطقه نیز در کلاسبندی استفاده میکند، فقط مناطق با اهمیت بالا کلاسبندی میشوند. نتایج بررسی دادههای استر آلتراسیونهای آرژلیک و آرژلیک پیشرفته را در بخش میانی متمایل به غرب منطقه نمایان ساخته است. در ادامه با انجام آنالیز مولفه اصلی مقاوم بر روی دادههای ژئوشیمیایی منطقه ارتباط عناصر طلا با آرسنیک و آنتیموان در محل آلتراسیونهای منطقه مشخص گردید. در نهایت با ترکیب نتایج دو رویکرد دورسنجی و تحلیل ژئوشیمیایی به روش آنالیز مولفه اصلی مقاوم میتوان گفت که کانیسازی اپیترمال طلا از محتملترین موارد در منطقه است و میتوان نتیجه گرفت که نوع سولفید بالای کانیسازی اپیترمال در منطقه اتفاق افتاده است. در پایان محدوده اطراف دو گسل متقاطع در غرب منطقه برای مطالعات تفصیلی پیشنهاد گردید. | ||
کلیدواژهها | ||
دورسنجی؛ ژئوشیمی؛ ترشولد شناور؛ آنالیز مولفه اصلی مقاوم؛ آلتراسیون هیدروترمال | ||
عنوان مقاله [English] | ||
Identification of the Metallic-Element Anomalies in Baluqaya Region Using Remote Sensing and Comparison of the Results with Geochemical Data | ||
نویسندگان [English] | ||
T. Nouri1؛ B. Beiglari2؛ A. Aryafar3 | ||
1Assistant Professor, Faculty of Engineering, University of Mohaghegh Ardabili (UMA), Ardabil, Iran | ||
2M.Sc Student, Dept. of Mining Engineering, Faculty of Engineering, Universsity of Birjand, Birjand, Iran | ||
3Associate Professor, Dept. of Mining Engineering, Faculty of Engineering, University of Birjand, Birjand, Iran | ||
چکیده [English] | ||
Northwestern part of Iran is one of the important metal bearing zones and the Baluqaya region which is one of the interesting parts of this area, was selected as the study area. In this research the endmembers were extracted from ASTER dataset and then were compared with spectral library to find matching reference minerals for them. Subsequently, the abundances of endmembers were exracted using the matched filtering technique. Then, the classification and distribution maps of minerals were extracted by implementing the floating threshold as a novel technique on endmembers abundance maps. The mineralogical data of the study area are also involved in the floating threshold method. This method classifies areas with high abundance values of endmembers that probabily have high potential for mineralization. The results delineated argillic and advanced argillic alterations at the midwest of the study area. By performing of robust principal component analysis (RPCA) on ICP-MS geochemical data, correlation of gold concentrations with that of antimony and arsenic was detected in the remote sensing derived alteration area. Finally, it is concluded that a possible high sulfidation epithermal mineralization system has developed in the study area | ||
کلیدواژهها [English] | ||
Remote sensing, Geochemistry, Floating threshold, RPCA, Hydrothermal alterations | ||
مراجع | ||
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