XXIV. Ore Deposits Flashcards
natural concentrations of useful metals, minerals
Mineral Deposits
concentrations of ore minerals which can be economically* exploited
Ore deposits
rocks/minerals that are mined, processed and delivered at a profit
Ore
non-valuable minerals in the ore (e.g. silica, clay)
Gangue
non-valuable portion of the ore
Waste
average content of an element in the earth’s crust: Oxygen
46.6%
average content of an element in the earth’s crust: Silicon
27.7%
average content of an element in the earth’s crust: Aluminum
8.1%
average content of an element in the earth’s crust: Iron
5.0%
average content of an element in the earth’s crust: Calcium
3.6%
average content of an element in the earth’s crust: Sodium
2.8%
average content of an element in the earth’s crust: Potassium
2.6%
average content of an element in the earth’s crust: Magnesium
2.1%
What is the typical composition of the Philippine five peso coin?
70% copper
5.5% nickel
24.5% zinc
grade where mining and processing costs are equal to proceeds from the sale of the product
Cut-off grade
Types of Ore Deposits
(1) Igneous ore deposits
(2) Hydrothermal ore deposits
(3) Sedimentary ore deposits
(4) Weathering ore deposits
(5) Metamorphic ore deposits
intermediate-felsic volcanic rocks
Kuruko-type
Kuruko-type located where in the Philippines?
Bagacay and Sulat, Samar
Besshi-type located where in the Philippines?
Canatuan
Cyprus-type located where in the Philippines?
Barlo
mixed volcanic-sedimentary environments
Besshi type
ophioite-related, extrusive basalts
Cyprus-type
products of intense chemical weathering and supergene enrichment of nickel bearing ultramafic rocks resulting to a characteristic mineralogical zonation
Nickel Laterites
repeated thin layers of iron oxides (magnetite/ hematite), alternating with iron-poor shale and chert; largest source of iron on Earth
Banded Iron Formations
