زمین‌شناسی، کانی‌شناسی و زمین شیمی کانسار باریت مشکان، شمال شرقی سبزوار، استان خراسان رضوی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 مجتمع آموزش عالی گناباد

2 دانشگاه فردوسی مشهد

چکیده

کانسار مشکان در شمال شهرستان سلطان آباد، سبزوار، و شمال غربی روستای مشکان در استان خراسان رضوی قرار دارد.  این منطقه از نظر جایگاه زمین­ساختی در مرز بین پهنه البرز شرقی، پهنه بینالود و شمال پهنه افیولیتی سبزوار واقع است. زمین­شناسی منطقه شامل سنگ­های رسوبی ماسه سنگ، سنگ آهک، کنگلومرا، شیل، مارن و واحدهای آتشفشانی ائوسن است. کانی­سازی باریت به صورت رگه - رگچه­ای و با روند بیشتر شمال­ غربی – جنوب­ شرقی واحدهای سنگی منطقه را قطع کرده است. کانی­ها شامل باریت، کوارتز، کلسیت، گالن و کانی­های ثانویه گوتیت، لیمونیت و مالاکیت هستند. شش نوع مختلف رگه - رگچه قابل تفکیک است. کوارتز کانی اصلی باطله در کانسار است. مقدار اکسید باریم در رگه­ها از 5/18 تا 06/62 درصد متغیر است. کمترین دمای تشکیل باریت­ها 235 تا 330 درجه سانتی­گراد بوده است و از محلولی دارای نمک­های NaCl و CaCl2 با درجه شوری 67/20 تا 4/21 درصد وزنی نمک طعام بوجود آمده­اند. براساس شواهد زمین­شناسی، کانی­شناسی و زمین­شیمی، باریت­ها از نوع گرمابی هستند.     
واژه­های کلیدی: کانی­شناسی؛ باریت؛ مشکان؛ پهنه بینالود، سلطان آباد.

کلیدواژه‌ها

عنوان مقاله [English]

Geology, mineralogy, and geochemistry of Mashkan barite deposit, north eastern Sabzevar, Khorasan Razavi province

نویسندگان [English]

  • Sedigheh Zirjanizadeh 1
  • Hamid Hafezi Moghaddas 2
1
2
چکیده [English]

Mashkan deposit is located northern Soltanabad, Sabzevar, Khorasan Razavi province, and tectonically, between Eastern Alborz zone, north Sabzevar ophiolite zone and Binalood zone. Geology of the area includes sedimentary rocks like sandstone, limestone, conglomerate, shale, marl and Eocene volcanic units. Barite mineralization as vein-veinlets with the mainly NW-SE trend has cut off the rock units. Minerals consist of barite, quartz and calcite associated with galena and secondary minerals such as goethite, limonite and malachite. Quartz is the most important waste mineral. According to fluid inclusion studies, formation temperature of mineralization is between 235 to 330 ºC and it is occurred from NaCl-, and CaCl2-bearing fluid with 20.67 to 21.4 wt. % NaCl equivalent salinity. Based on geology, mineralization, and geochemistry, Mashkan barites are hydrothermal type.

کلیدواژه‌ها [English]

  • mineralogy
  • Barite
  • Mashkan
  • Binalood Zone
  • Sultan Abad

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مجله بلورشناسی و کانی شناسی ایران
دوره 28، شماره 1 - شماره پیاپی 77
فروردین 1399
صفحه 249-258

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  • تاریخ دریافت: 09 اردیبهشت 1398
  • تاریخ بازنگری: 03 تیر 1398
  • تاریخ پذیرش: 22 مرداد 1398

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