地质外文文献翻译中英文对照
长安大学资源学院
英语文献翻译
学    院    地球科学与资源学院
专 业    资源勘查工程
学生姓名       
学 号 201127020308   
指导教师 张亚敏   
2015年6月18日
Title:Orthomagmatic ore deposits
On e.Orthomagmatic ore deposits
The magma contains a certain number of metal and volatile
components of the silicate melt. All kinds of magma after crystallizatio n and differe ntiatio n, make the formi ng 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 crystallizatio n and differe ntiatio n, and gen erally have the followi ng properties:
1、    Deposits have the mainly relationship with the mafic and ultramafic rocks.A nd a small nu mber of magmatic deposits with alkaline rocks or magmatic carbonatite-related.
Mineralization and diagenesis often begin at the sametime.And this is typical of syngenetic ore deposits. Few mineralization of the magmatic deposits may be continued to a later time, but generally does not exceed a total period of magmatic activity.
2content的中文翻译、    The magmatic deposits ore body majority present stratiform, lenticular and podiform and so on.And they produced in the magmabody,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, whenthe 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 so on.
1、    Control the conditions of magmatic rocks formed by magmatic deposits
Magma is the main provider of the metallogenic material
of the magmatic deposits and the medium of containing    mineral
medium.Therefore,how much of the content of useful components of magma is the possibility of the formation of magmatic deposits.
I.Magmatic rocks metallogenic specialization
Metallogenic specialization of magmatic rocks in the genesis of magmatic rocks with endogenous deposits showed regular contact, and specific types of magmatic rocks are often produced specific types of deposits.

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