火成巖脈 的英文怎麼說
中文拼音 [huǒchéngyánmài]
火成巖脈
英文
igneous rock clean-
The formation of the enriched mantle ( em1 ) is attributed to the strong metasomatism - taking place between subducted yangtze lower crust and nc ( north of china ) ancient lithosphere
2 、火山巖、堿性超基性脈巖和基性脈巖（除少數外）都形成於大陸板內拉張環境。The genesis of gold deposits is complex in this district, the type of quart - vein plus etch rock belongs to hydro thermally superimposed complex mineralization. the type of porphyry and scraping rock containing charcoal belongs to volcano sediment - alteration hydro thermally gold deposits, the formation of gold deposits is controlled by several factors
本區金礦床的成因比較復雜，石英脈+蝕變巖型金礦屬于熱液疊加復合成因礦床，含炭火山碎屑巖型金礦屬於火山沉積?變質熱液改造型層控金礦床。The comparison study of the three belts indicates although they are distinct from each other all the three belts show many common features in the aspect of the metallogeny of large - rich vein uranium deposits, i. e : the important metallogenic areas are located above the old crystalline basement ; the paleo - rifting ( taphrogeny ) controls the development of the volcanic belt and at the same time it is favourable metallogenic tectonic environment ; the occurrence of uranium deposit does not depend on the lithology of volcanic rocks ; uranium metallogeny is obviously constrained by deep geologic processes and the connected fault - structural net is the necessary condition for the formation of large - rich uranium deposits
對比研究表明，雖然它們各具特色，就脈型富大鈾礦床成礦作用而言，它們又具有較多的共性：重要成礦區的火山噴發皆奠基在古老的結晶基底上；古裂谷（或裂陷）既控制了火山巖帶的發育，又是有利的成礦構造背景；鈾礦賦存對火山巖的巖性沒有明顯的選擇性；鈾成礦的深部控製作用明顯；聯通的構造網路系統是形成富大鈾礦的必要條件。
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