残余岩浆(residual magma)指岩浆结晶作用进行至某时期时,其剩余的液相部分称为残余岩浆。本源岩浆在分异作用的某时期内所形成的火山岩的基质成分,即代表某时期残余岩浆成分。结晶作用充分进行后(伟晶岩期)的残液,多形成伟晶岩,其成分一般富含二氧化硅、碱质及挥发份,但在某些基性残余岩浆中,则富含铁及钛。由于残余岩浆常携带一些金属物质,因此它对成矿起着一定的作用。
... 残余土壤;原积土 residual soil 残余岩浆 colonnes filtrantes 残余岩浆 residual magma ...
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Residual magma were inferred as mother magma formed mafite, due to it’s Mg index (37-72, average 59) is further less Mg index (65-72) of primary magma balanced with pyrolite.
其Mg=37—72,平均约59,远小于与地幔橄榄岩平衡的原始玄武岩浆的Mg指数(65—72),表明其母岩浆具有残余岩浆性质。
参考来源 - 云南省双江县石炭纪牛井山蛇绿混杂岩的岩石学研究·2,447,543篇论文数据,部分数据来源于NoteExpress
稀土元素矿床是霞石正长质岩浆分异残余熔体的产物,侵位于岩体最高层位。
The REE enriched residual melt penetrated into the top of intrusion would be the products of nepheline syenite magma produced in the process of differentiation.
煌斑岩岩浆晚期残余气液与成矿流体组成相近、沉淀次序相同, 表明它们可能有成因联系。
The last remain fluid of lamprophyre magma is similar to metallogenetic fluid in composition and precipitating sequence, showing their genetic relationship.
科学家确定凹陷处是一个火山口,并且在它附近明亮的圆环是火山碎屑岩,是火山喷发出岩浆的残余,很象地球上的火山喷口。
The scientists determined that the depression was a volcanic vent, and the bright ring around it was pyroclastic, remnants of lava that had been spewed outward, much like a volcanic fountain on Earth.
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