【正文】 gma.Magmatic deposits is the product of the magma by crystallization and differentiation, and generally have the following properties: Deposits have the mainly relationship with the mafic and ultramafic a small number of magmatic deposits with alkaline rocks or magmatic carbonatiterelated. Mineralization and diagenesis often begin at the same 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. The magmatic deposits ore body majority present stratiform, lenticular and podiform and so they produced in the magma body,and the wall rock of containing ore is the mother 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 penetration magmatic deposits have the clear boundaries with the wall rock. 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. The ore and the wall rock basically have the same mineral position, when the useful minerals of the rock body aggregate and reach a certain size,they bee the orebody. The ore of magmatic deposits often have,disseminated,the banded,eye porphyritic,dense massive,brecciated and so on,ore ores structure can be broadly divided into the following categories: subthe different magmatic condensate crystalline or stacking interactions。少數(shù)巖漿礦床的成礦作用雖可延續(xù)到較晚的時間，但大體上不超過總的巖漿活動時期。 巖漿礦床的形成條件巖漿礦床主要源于巖漿，是多種地質因素綜合作用的產(chǎn)物，其中起主導作用的是成礦元素的地球化學性狀、巖漿巖條件、大地構造條件和物理化學條件等。III巖漿同化混染作用對巖漿礦床成礦的影響巖漿在其形成和向上運移的過程中，往往會熔化或溶解一些外來物質，從而使巖漿成分發(fā)生改變的作用，即同化作用。根據(jù)成礦作用的方式和特點，巖漿成礦作用主要可分為結晶分異成礦作用、熔離成礦作用、巖漿爆發(fā)成礦作用和巖漿噴溢成礦作用四類。