felsic 中文意思是什麼
felsic
解釋
長英礦物-
Metallogenic models of cu, ag deposits in felsic volcanic rock of permian continental facies of awulale, western tianshan mt
西天山阿吾拉勒二疊紀陸相長英質火山巖銅銀礦礦床模式 -
A large number of studies of geochronology and geochemistry indicate that mesozoic intermediate - felsic rocks from the dabie orogen have originated from recycling of the subducted yangtze continental crust itself
摘要大量的同位素地質年代學和地球化學研究表明，大別山中生代中酸性巖為俯沖揚子陸殼再循環的產物。 -
These deposits, which can be obviously divided into basic and acid volcanic types, are present in the carboniferous bi - model volcanic series and occur along two horizons, i. e., the lower carboniferous mafic volcanic rock and the upper carboniferous felsic volcanic rock
這些礦床產在石炭系雙峰式火山巖系之內，沿著下石炭統基性火山巖和上石炭統酸性火山巖兩個層位產出，分別以玄武巖和流紋巖為容礦主巖，可以明顯地分成基性火山巖型和酸性火山巖型兩種類型。 -
Among the felsic rocks, samples from the zhangjiakou formation ( fm. ) are characterized by moderately to strongly eu anomalies, and variable negative anomaly of sr, ti and p, whereas samples from the donglingtai fm. exhibit enriched lree and flat hree patterns with nb / ta fractionation and high zr / sm ratios
在中酸性火山巖系列中，張家口組火山巖表現出中等-強烈的eu負異常和不同程度的sr 、 ti 、 p負異常；東嶺臺組火山巖表現出富集lree和平坦的hree的稀土配分模式， nb ta分餾，高zr sm比值。 -
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燕山地區早侏羅世中基性火山巖來自於早期俯沖交代的古老巖石圈地幔部分熔融作用，俯沖交代作用可能與早期古亞洲洋閉合事件有關；晚侏羅世中基性火山巖更多來自於類似於emi型地幔源區的部分熔融作用，俯沖交代成分貢獻很弱；早白堊世基性火山巖則來自於emi型地幔源區的部分熔融作用。 -
All of the mafic samples have age - corrected moderate enriched sr and enriched nd isotopic ratios and the felsic rocks span larger range in the initial sr and nd isotopic ratios than mafic volcanics, similar to isotopic compositions of lower crust of north china block
在sr - nd同位素組成上，中基性火山巖為中等富集的sr和低的nd同位素比值；中酸性火山巖的sr同位素比值總體較中基性巖高且變化大，類似華北陸塊下地殼巖石的同位素組成特徵。 -
All the mafic and felsic volcanic - hosted massive sulfide deposits are therefore defined as the kunlun type volcanic - hosted massive copper sulfide deposit
這些基性火山巖型和酸性火山巖型礦床被統稱為昆侖式火山巖型塊狀硫化物銅礦床。 -
A ree partition simulation suggests that the tianzhushan intermediate rocks can be generated by partial melting, in coupling with fractional crystallization, of dioritic gneiss which is similar in chemical compositions to the mafic rocks in the lower crust in north dabie ; partial melting of intermediate grey gneiss which is similar in chemical compositions to the middle crust in north dabie can generate the tianzhushan felsic rocks
Ree配分的定量模擬計算結果表明，與基性下地殼相似的北大別基性閃長質片麻巖部分熔融並經過結晶分異能夠形成與天柱山中性巖類似的稀土元素組成，而與中性地殼相似的北大別中性灰色片麻巖部分熔融能夠形成與天柱山花崗巖類似的稀土元素組成。 -
Ree partition simulation suggests that the tianzhushan intermediate rocks can be generated by partial melting, in coupling with fractional crystallization, of dioritic gneiss which is similar in chemical compositions to the mafic rocks in the lower crust in north dabie ; partial melting of intermediate grey gneiss which is similar in chemical compositions to the middle crust in north dabie can generate the tianzhushan felsic rocks
Ree配分的定量模擬計算結果表明，與基性下地殼相似的北大別基性閃長質片麻巖部分熔融並經過結晶分異能夠形成與天柱山中性巖類似的稀土元素組成，而與中性地殼相似的北大別中性灰色片麻巖部分熔融能夠形成與天柱山花崗巖類似的稀土元素組成。
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