Orthomagmatic-ore-deposits岩浆矿床大学毕业论文外文文献翻译及原文

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　　文献、资料英文题目： Orthomagmatic ore deposits 文献、资料来源：

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　　翻译日期： 2017.02.14

　　英语文献翻译

　　Title:Orthomagmatic ore deposits

　　One.Orthomagmatic ore deposits

　　The magma contains a certain number of metal and volatile components of the silicate melt. All kinds of magma after crystallization and differentiation, make the forming materials dispersed in the magma gathered and formed

　　deposits.And this deposits is called magmatic deposits.

　　Magmatic deposits formed in the magmatic stage, the source of the material of the deposit is the main ore-bearing magma.

　　Magmatic deposits is the product of the magma by

　　crystallization and differentiation, and generally have the

　　stratiform, lenticular and podiform and so on.And they produced in the magma body,and the wall rock of containing ore is the mother rock.Few cases,orebody presenting vein and stockwork enter the wall rock which outside of the mother rock Between the ore body and the wall rock generally is gradual change or rapid gradual change relationship.Only penetration magmatic deposits have the clear boundaries with the wall rock.

　　3、Except the rare and rare earth elements deposits of the magmatic carbonatite due to special causes have some

　　alteration about the wall rock,the vast majority of magmatic deposits surrounding rock does not have a significant alteration phenomenon.

　　4、The ore and the wall rock basically have the same mineral composition, when the useful minerals of the rock body

　　aggregate and reach a certain size,they become the orebody.

　　5、The ore of magmatic deposits often

　　have,disseminated,the banded,eye porphyritic,dense

　　massive,brecciated and so on,ore structure.The ores structure can be broadly divided into the following categories:

　　I.Structure sub-the different magmatic condensate crystalline or stacking interactions; II.Reflect the structure of the immiscible fluid crystallization process III.Reflect the changes in the structure of the physical and chemical conditions.IV.Epigenetic structure.

　　6、The magmatic deposits forming temperature is high, generally between 1200 to 700 C. The mineralization depth changes,generally formed in the ground a few kilometers to tens of kilometers.

　　Tow.The formation conditions of magmatic deposits

　　Magma deposits are mainly derived from the magma, it is the combined effects of the product by a variety of geological factors, which playing a leading role is the geochemistry of ore-forming elements traits, the magmatic rock conditions, tectonic conditions and physical and chemical conditions and

　　Mafic and ultramafic rock is the complex igneous complex formed by the combination of a variety of rock types, rock types from a single rock composed of rock mass is relatively rare.The size of the rock mass ranging mostly small,and rock strains, rock cover, rock, bedrock is the most common form of the rock mass. With facies and the different

　　combinations,the mafic and ultramafic rocks can be divided

　　Tectonics have a major impact on the type of magmatic deposits, distribution, the most magmatic deposits associated with mafic and ultramafic igneous rocks on the Causes and space. Mafic and ultramafic magma formed by partial melting of mantle material,so the deep fault cuts through the crust to reach the upper mantle have a strict control effect on the mafic,