熔融作用 meaning in English
anataxis (selective fusion)
Examples
- Ultramafic rock fragments , which almost is altered to ophite , distributed in structural zone and displayed structural lens . so far , 9 fragments were discovered and mapped in nujinshan and bujing area ultramafic rock can be divided two kinds according to it ' s geochemical characteristics . one can be correlated with metaperidotite , which represented residual part that primary pyrolite underwent moderate partial melting , from some representative ophiolite melange in the world
按超镁铁岩类的地球化学特征可将其划分为两类：一类具有较高而稳定的mgo 、较低的al _ 2o _ 3 、极低的cao ， m f值为8 . 0 ? 8 . 4 ，按标准矿物组合进行分类可定为方辉橄榄岩，且均为fa _ ( 100 ) 、 en _ ( 100 )的镁质端元组分；可与世界上一些典型的蛇绿岩套中变质橄榄岩进行对比，代表了原始地幔中等部分熔融作用后残余物。 - During diagenetic process , there may exist the fractional crystallization of clino - pyroxene , plagioclase , olivine and ti - fe oxide , and the accumulation of olivine . the alkalic - ultramafic dikes formed by low degree partial melting ( 3 . 4 % ) of enriched mantle , consist of single olivine pyroxenolite , the dominating olivine fractionation is evident
成因上为富集地幔部分熔融作用的结果，但在成岩过程中也可能存在单斜辉石、斜长石、橄榄石和ti - fe氧化物等矿物的分离结晶作用。 - 2 . early jurassic mafic volcanic rocks in yanshan area were derived from decompression melting of an ancient continental lithospheric mantle , which had been previously metasomatized by subducted slabs during the closure of paleo - asian ocean ; the mantle source of late jurassic mafic volcanic rocks were contributed by dominant emi and insignificant subducted metasomatic components ; early cretaceous mafic volcanic rocks were derived from decompression melting of an ancient continental lithospheric mantle ( emi ) . with regard to the basaltic lavas , the felsic rocks resulted from partial melting of continental crust , which closely related to basaltic underplating
2燕山地区早侏罗世中基性火山岩来自于早期俯冲交代的古老岩石圈地幔部分熔融作用，俯冲交代作用可能与早期古亚洲洋闭合事件有关；晚侏罗世中基性火山岩更多来自于类似于emi型地幔源区的部分熔融作用，俯冲交代成分贡献很弱；早白垩世基性火山岩则来自于emi型地幔源区的部分熔融作用。