科马提岩

和桂北、湖南益阳中元古代的科马提岩也可对比，但变质程度较高，达低角闪岩相。

The green schists can also be compared with the middle proterozoic komatiite in Northern Guilin and the Yiyang area of Hunan Province , but they are higher grade in metamorphic rank , approximate to low-grade hornfels facies .

古中元古代时，琼中屯昌变基性-超基性岩，为大洋型火山岛弧低钾拉斑玄武岩，明显具有镁铁质-玄武质科马提岩特征，来源于高度亏损的地幔；

At the Paleo-Mesoproterozoic era , the meta-basic-ultrabasic rocks on eastern Hainan are oceanic low K arc tholeiite with the features of mafic-basaltic komatiite evidently , originated from highly depleted mantle and are formed under the tectonic setting of volcanic arc .

海南岛前寒武纪结晶基底和科马提岩的发现

Discovery of the old crystalline basement and komatiite on Hainan island

湖南益阳玄武岩质科马提岩鬣刺结构的基本特征

Elementary characteristics of spinifex texture in basaltic komatiite from yiyang , Hunan

本文研究的科马提岩位于大兴安岭北段吉峰地区。

The Jifeng komatiites are situated in the north Da Hinggan Ling .

非均匀温度场中熔体结晶作用与科马提岩结构成因

Melt crystallization and the texture formation of komatiite in heterogeneous temperature field

湖南益阳发现玄武岩质科马提岩

The Discovery of Basaltic Komatiites in Yiyang , Hunan Province

闽中早&中元古代科马提岩产于拉张盆地的构造环境。岩石圈生热效应对拉张盆地地热史的影响

Influence of radioactive heat generation within lithosphere on geothermal history of extensional basin

科马提岩类岩浆熔离硫化镍矿石建造

Nickel sulfide formation of komatiite magmatic liquation

科马提岩仅限于超镁铁质熔融体（Mgo>30wt%）所生成的火山岩。

Komatiites are defined as lavas derived from ultramafic melts ( MgO > 30wt % ) .

科马提岩研究的新进展

New developments of studies on komatiites

仅有一件矿石样品与地幔包体、球粒陨石地幔或科马提岩接近，暗示其深部地幔源区的性质。

Only one ore sample is compositionally close to mantle inclusion , chondrite mantle or komatiite , indicating the property of deep mantle source .

野外地质调查和室内岩石学研究表明，大兴安岭北段吉峰林场一带变质超基性岩为具有典型鬣刺结构的科马提岩。

Field geological survey and geochemistry indicate that the metamorphic ultrabasic rock in Jifeng area of the north Da Hinggan Ling Mountains is komatiite with spinifex texture .

笔者对四川北部前震旦系基底中的超基性、基性岩资料进行了一次清理，在此基础上阐述了科马提岩的分布、产状、岩石类型、地球化学等。

Summing up and analysing the previous data on ultrabasic and basic rocks , this paper sets forth the distribution , occurrence , rock type and geochemistry , etc.

最终含有镍的岩浆从地幔中涌出，跟硫化物结合形成硫化镍，并将硫化镍包裹在一种叫做“科马提岩”的火山岩中。

Finally , nickel-bearing magma welled up from Earth 's mantle , combining with the sulfide to form nickel sulfide and encasing the compound inside volcanic rock called komatiite .

与国外太古代绿岩带科马提岩对比，岩石化学成分、分带性、特有的鬣刺结构及区域变质特征、含矿性等方面亟相似。

The komatiite in this area is very similar to those in Archean greenstone belts abroad with respect ot the petrochemical composition , zoning , special spinifex texture , characteristics of regional metamorphism and ore potentiality .

科马提岩显示了从超镁铁质到镁铁质地球化学趋势，拉斑玄武岩具有从富镁到富铁的趋势，而上覆长英质火山岩则遵循钙-碱趋势。

The komatiite displays a geochemical trend from ultramafic to mafic , and the tholeiite shows a geochemical trend from rich Mg to rich Fe . The felsic igneous rock overlying the komatiite series displays a calc alkaline trend .