Ni-Lateritlerin Oluşumu ve Özellikleri

Abstract

Ni-lateritler çoğunlukla dunit, peridotit, serpantinit gibi olivin-içeren ultramafik kayaçlardan şekillenen ve ekonomik olarak işletilebilir Ni-Co rezervleri içeren oluşumlardır. Nikel birincil olarak %0.16-0.40 Ni içeren forsteritik olivinden kaynaklanmaktadır. Mineraloji temelinde, Ni-lateritler Tip A (sulu Mg-silikat yatakları), Tip B (kil simektit yatakları), Tip C (oksit yatakları) şeklinde 3 ana tip içerisinde incelenebilmektedir. Batı Anadolu’daki Ni-laterit yatakları (örn: Çaldağ, Gördes, Muratdağı vd.) ultramafik kayaçların tropikal iklim alanlarında bozuşmasının yaygın birer ürünüdürler. Derleme niteleğindeki bu çalışmada, dünya genelinde gözlenen Ni-lateritlerin yayılımları, tipleri ve oluşum koşulları irdelenmiştir

Keywords

• laterit, dunit, serpantinit, ultramafik

Formation and Properties of Ni-Laterites

Abstract

Ni-laterites, derived mainly from olivine-bearing ultramafic rocks such as dunite, olivine-pyroxene peridotite, their serpentinized equivalents outcrop over a wide domain, are economically exploitable reserves of nickel and cobalt. The nickel is originated principally from forsteritic olivine (>Fo75), which commonly contins 0.16-0.40% Ni. Based on the mineralogy, Ni-laterites are divided into three main types as Type A (hydrated Mg-silicate deposits), Type B (clay silicate deposits), Type C (oxide deposits). Ni-laterites in western Anatolia (e.g. Çaldağ, Gördes, Muratdağı etc.) are common products of tropical weathering of ultramafic rocks.In this compilation type of study,distributions,types and formation processes of Ni-laterites worldwide wereexamined

Keywords

• Laterite, dünite, serpentinite, ultramafic

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