Mineral Deposits

1. What argon mineral touch ons? Describe quintet slipway by which a mineral touch on can form. A mineral bind is a natural dousing of economically worthy minerals. The minerals in a mineral deposit ar non carbonaceous; i.e., they do not contain electron-rich ( chemic substancely reduced) carbon. Coal is an recitation of a carbonaceous deposit. Coal is a fossil lick alternatively than a mineral deposit. A mineral deposit need not be valuable enough that it could be mined profitably. A mineral deposit which meets this profitability criterion is considered to be an ore deposit. either ore deposits therefore are mineral deposits tight the reverse is not necessarily true. The look on of closely mineral deposits does not depend as much upon the mineralogy of the deposit as upon the chemical composition of the deposit, i.e., the concentration of valuable instalments at bottom the deposit. However, the value of gem deposits is directly linked to mineralogy rather t han chemical composition. mineral deposits form by a blanket(a) variety of processes. All of these processes involve the concentration of one or more chemical elements from a previous host in which the elements were not as concentrated. Most elemental concentration depends upon the chemical properties of the concentrated element entirely the physical property of concentration controls the formation of placer mineral deposits and some(prenominal) ultramafic layered deposits. The most famous placer deposits are those of gold. The density of pure gold is 19.

3 g/cm3 but the density of placer nuggets is a little less than thi s because gold perpetually is loaded with ! some silver. The density of pure silver is 10.5 g/cm3 . Before go physically concentrated within streams, specks of gold-silver alloy are disseminated within a hostrock which may be of some(prenominal) rock type. No matter what the hostrock may be, the gold-silver nuggets are at least five times denser than the hostrock and so readily occasion separated on the basis of density. Density separation from clasts of the hostrock occurs when both the gold-silver specks and hostrock clasts are wear away by a stream. If you sine qua non to get a rise essay, order it on our website: OrderCustomPaper.com

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