Investigation of the Operations of Open Pit Iron Mineralization for Acid Mine Drainage (Adana/Saimbeyli)

Öz

This study includes the field and laboratory studies (statics tests related to the Acid Production Potential [APP], Neutralization Potential [NP]) to investigate the estimation for the formation of Acid Mine Drainage of an iron mineralization located in Kaburluk, Saimbeyli District, Adana Province. An iron ore formation in the studied region is located in a trap in the dolomitic limestones of the middle Devonian at the base of the shale sandstone-limestone sequences of the upper Devonian. X-ray Fluoresence (XRF), X-ray Diffraction (XRD), total sulfur (S), NP, Net Neutralization Potential (NNP), Acid Production Potential (APP), mud pH and squirting tests were carried out on the ore and other rocks samples collected from the study area within in the scope of geochemical and static tests. The NP, Net Neutralization Potential (NNP), APP, Neutralization Potential Ratio (NPR=NP/APP) values of the samples were evaluated based on the data obtained. The paragenesis of the mineralization was composed of hematite, gothite siderite and limonite, while constitutes dolomite, calcite and pyrite minerals constitute the host rock. According to the results of the analysis performed on the host rocks, % total S: 0.21-0.42, NP (∑NP (kg/ton)): 289.07-478.07, APP sulfuric acid equivalents (kg / ton): 13, 13- 26.25 were determined. The NPR values were found to be between 11.01 -31.26. According to the results belonging to the ore samples, the following values were calculated: % total S: 0.03-0.09, NP (∑NP (kg / ton)): 8.07-53.16, APP sulfuric acid equivalents (kg / ton): 1.56- 5.56. The NPR values of the ore sample varied 2.58 and 16.50. According to the NPR values, there was no acid producing potential of the ore-bearing samples and host rocks. However, it is recommended that kinetics test should be performed after mining activities start in the region as there is a potential to generate acid during conducting mining operations.

Anahtar Kelimeler

• Acid Mine Drainage
• Static Tests
• Acid-Base Accounting
• Saimbeyli/Adana Iron Mineralization

Açık İşletme Demir Cevherleşmesinin Asit Maden Drenajı Oluşumuna Yönelik Kestirimlerinin Araştırılması (Adana/Saimbeyli)

Öz

Bu çalışma, Adana İli, Saimbeyli İlçesi, Kaburluk Mevkiinde bulunan demir cevherleşmesinin Asit Maden Drenajı (AMD) oluşumuna yönelik kestirimlerin araştırılması hakkında arazi ve laboratuvar çalışmalarını ve Asit Üretme Potansiyeli (AÜP), Nötürleştirme Potansiyeli (NP) ile ilgili statik testleri içermektedir. Bölgedeki demir cevheri oluşumu Üst Devoniyen şeyl kumtaşı-kireçtaşı ardalanmasının tabanında Orta Devoniyen dolomitik kireçtaşları içerisinde bir kapanda yerleşmiştir. Araziden alınan cevher ve yan kayaç örnekleri üzerinde jeokimyasal ve statik testler kapsamında XRF, XRD, toplam S (toplam kükürt), NP (Nötralizasyon potansiyeli), AÜP (Asit Üretim Potansiyeli), Çamur pH, fışırdama ölçümleri yapılmış, elde edilen verilere göre örneklerin NP, NNP (Net nötralizasyon potansiyeli), AÜP, Nötürleşme potansiyel oranı (NPO= NP/AÜP) değerlendirilmiştir. Cevherleşmenin parajenezini hematit, götit, siderit ve limonit, yan kayaç parajenezini ise dolomit, kalsit ve pirit mineralleri oluşturmaktadır. Yan kayaç örneklerinde % toplam S: 0,21-0,42, NP (∑NP (kg/ton)): 289,07-478,07, AÜP sülfürik asit eşdeğerleri (kg/ton): 13,13- 26,25 tespit edilmiştir. NPO değerleri, 11,01-31,26 aralığında hesaplanmıştır. Cevherde yapılan analiz sonuçlarına göre: %toplam S: 0,03-0,09, NP (∑NP (kg/ton)): 8,07-53,16, AÜP sülfürik asit eşdeğerleri (kg/ton):1,56-5,56 tespit edilmiştir. NPO değerleri ise 2,58-16,50 olarak hesaplanmıştır. NPO değerlerine göre yan kayaç ve cevherli örneklerin asit üretme potansiyeli bulunmamaktadır. Ancak, maden sahasının faaliyete geçildiği zamanlarda asit üretme potansiyel ihtimali mevcut olduğundan, kinetik testlerin bölgede maden faaliyeti başladıktan sonra yapılması önerilmektedir.

Anahtar Kelimeler

• Asit Maden Drenajı
• Statik Testler
• Asit-Baz Hesabı
• Saimbeyli/Adana Demir Cevherleşmesi

Kaynakça

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