资源描述：
《地质外文文献翻译中英文对照》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、精品资料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张桃学号201127020308指导教师张亚敏2015年6月18日精品资料Title:OrthomagmaticoredepositsOne.OrthomagmaticoredepositsThemagmacontainsacertainnumberofmetalandvolatilecomponentsofthesilicatemelt.Allkindsofmagmaaftercrystallizationanddifferentiation,maket
2、heformingmaterialsdispersedinthemagmagatheredandformeddeposits.Andthisdepositsiscalledmagmaticdeposits.Magmaticdepositsformedinthemagmaticstage,thesourceofthematerialofthedepositisthemainore-bearingmagma.Magmaticdepositsistheproductofthemagmabycrystallizationanddifferent
3、iation,andgenerallyhavethefollowingproperties:1、Depositshavethemainlyrelationshipwiththemaficandultramaficrocks.Andasmallnumberofmagmaticdepositswithalkalinerocksormagmaticcarbonatite-related.Mineralizationanddiagenesisoftenbeginatthesametime.Andthisistypicalofsyngenetic
4、oredeposits.Fewmineralizationofthemagmaticdepositsmaybecontinuedtoalatertime,butgenerallydoesnotexceedatotalperiodofmagmaticactivity.2、Themagmaticdepositsorebodymajoritypresentstratiform,lenticularandpodiformandsoon.Andtheyproducedinthemagmabody,andthewallrockofcontainin
5、goreisthe精品资料motherrock.Fewcases,orebodypresentingveinandstockworkenterthewallrockwhichoutsideofthemotherrockBetweentheorebodyandthewallrockgenerallyisgradualchangeorrapidgradualchangerelationship.Onlypenetrationmagmaticdepositshavetheclearboundarieswiththewallrock.1、Exc
6、epttherareandrareearthelementsdepositsofthemagmaticcarbonatiteduetospecialcauseshavesomealterationaboutthewallrock,thevastmajorityofmagmaticdepositssurroundingrockdoesnothaveasignificantalterationphenomenon.2、Theoreandthewallrockbasicallyhavethesamemineralcomposition,whe
7、ntheusefulmineralsoftherockbodyaggregateandreachacertainsize,theybecometheorebody.5、Theoreofmagmaticdepositsoftenhave,disseminated,thebanded,eyeporphyritic,densemassive,brecciatedandsoon,orestructure.Theoresstructurecanbebroadlydividedintothefollowingcategories:I.Structu
8、resub-thedifferentmagmaticcondensatecrystallineorstackinginteractions;II.Reflectthestructureoftheimmisc
