M - mafic 中文

mafic adj.【地質學；地理學】(火成巖的)鎂鐵質。

mafiosi
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于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于類似于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于emi型地幔源區的部分熔融作用。
The mantle source for the mesozoic mafic volcanic rocks in yanshan area exhibit transition character in space and time : the mantle source components vary from subduction - related metasomatic components and emi components through dominant emi components and slight subduction - related metasomatic components to emi components ; spatially , mantle source of the volcanic rocks show a regular variation trend from an enriched lithospheric mantle with emi - like signatures in the western shandong province through emi and / or subduction - related metasomatic components in yanshan area to subduction - related metasomatic lithospheric mantle in the hinggan - mongolian orogen 燕山地區中酸性火山巖則來源于地殼，與玄武質巖漿底侵作用關系密切。 3燕山地區火山巖源區組分在時空上具有一定的演化規律：在時間上，從早期俯沖交代地幔及emi的參與，經中期以emi占主導及極少量俯沖交代組分的階段，演變到晚期以emi為主，可能有少量軟流圈貢獻的組分，再到晚白堊世以軟流圈為主。
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并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。
The mafic rocks have high ( 87sr / 86sr ) j ( 0 . 7046 - 0 . 7077 ) and 207pb / 204pb ( 15 . 47 - 15 . 67 ) , but relatively low in ( 143nd / 144nd ) i ( 0 . 5125 - 0 . 5127 ) and 206pb / 204pb ( 18 . 26 - 18 . 52 ) . the negative correlation between 143nd / 144nd and 206pb / 204pb and the positive relationship between 87sr / 86sr - 206pb / 204pb suggest a mixing of a depleted mantle source and an em2 component in the study area . calculation reveals that the maopin - shaianjiao mafic rocks are formed by 5 - 15 % degree of partial melting of an lree - riched spinel iherzolite 模擬計算表明，該基性巖墻群是尖晶石二輝橄欖巖地幔5 - 15部分熔融的產物；微量元素配分模式及理論模擬表明茅坪?曬鞍角基性巖體的地幔源區在熔融前曾受到1俯沖沉積物熔體的源區混染和5流體交代作用。
On the basis of detailed and systematic studies on the petrography , major and trace elements and sr - nd isotopic data of mesozoic volcanic rocks , especially the mafic volcanic rocks in yanshan area , we successfully studied the deep processes related to magma generation and their relationship with shallow - level tectonic evolution . the major conclusions are summarized as below . 1 論文通過對燕山地區中生代火山巖，特別是中基性火山巖，進行詳細而系統的巖石學、主微量元素地球化學特征和sr - nd同位素組成特征的研究，主要取得了以下研究成果： 1燕山地區中生代( j - k )火山巖為一套鈣堿性-高鉀鈣堿性-橄欖安粗巖系列巖石。
Integrating the ages of the mafic dikes and alkalic - ultramafic dikes in this paper , and the known data of mafic dikes and volcanic rocks , at least , there existed four episodes mesozoic crustal extension in shandong province , namely , 80ma , 100ma , 120 ma and140ma , which is similar to that of sc ( south china ) , indicating that maybe the effect of the subductio 但魯東地區在地殼拉張方面可能存在著與魯西地區不同的制約因素：即魯東地區存在拆沉作用和可能存在地慢柱的影響’ 、而魯西地區可能受到了郊廬斷裂的左行走滑剪切和拉張活動的影響。
The southern hainan mafic dykes are strongly enriched in lile with high nb / ta ratios , indicating a magma source reconstructed by silicic - melt through partial melting of ancient subducted slides . however , the northern hainan mafic dykes with chondritic nb / ta ratio should be derived from the fiuid - metasomatized mantle related to ancient subduction zone 瓊南基性巖脈強烈富k _ 2o等lile和具有較高nb ta比值，其地幔源區應受到了古俯沖板片部分熔融形成的硅質熔體的改造；而瓊中基性巖脈的nb ta比值接近于球粒隕石和morb值，應為古俯沖帶含水流體交代的地幔源區的產物。
On the basis of analysis and comparison between two drills , one in the center of bohai sea , another near the west shore of bohai sea , ultra - long electromagnetic wave remote sensing can be applied to forecast the interfaces between the different rocks , and help to choose the location of drill and drilling plan . the ultra - long electromagnetic remote sensing also can be applied to general investigation in the prospecting area and organizing the structural map on the basis of the profiles and plane . based on the analysis of the ultra - long electromagnetic wave curves from tanggu to dalian , the geological body to effect the high gravity and magnetic anomalies could be a mafic intrusion . the magma activity provided the heat source to organic maturation in the center of bohai sea , so the center of bohai sea could be the prospection of deep gas in bohai sea 根據渤海西岸和渤海中部兩口探井的探測和對比實驗分析，利用超長電磁波遙測技術可以根據已知探井的探測對比分析預測新探井的巖性界面，協助井位的選址和設計。另外，利用超長電磁波的探測技術可以從剖面和平面上對遠景區進行普查性探測，編制遠景區的構造圖。根據塘沽-大連探測的超長電磁波頻譜曲線剖面對比分析，證實引起渤海中部重磁異常高的地質體可能是基性超基性巖體。
The mafic dikes also formed by the partial melting of enriched mantle , include gabbro , diabase ( distributing mainly in luxi ) and lamprophyres ( camptovogesite , odinite and hornblende lamprophyres ) ( mainly in ludong ) . for all the rocks , crustal contamination was absent when magma emplaced . 2 基性脈巖主要包括輝長巖、輝綠巖(主要分布在魯西地區)和煌斑巖(以斜閃煌斑巖為主，同時含部分拉輝煌斑巖和角閃煌斑巖) (主要分布在魯東地區) ，都為富集巖石圈地幔部分熔融的產物。
These mafic dykes may provide some important insights about the mantle processes at ca . 1800 - 1700 ma and their geodynamic implications . unfortunately , more attention has been paid to palaeomagnetic , petrologic , lithochemical and k - ar geochronological studies of these mafic dykes 該論文現在對作為華北陸塊早元古代基性巖墻群重要組成部分的南太行山地區基性巖脈開展了較為系統的年代學、元素和同位素研究，以期為理解華北陸塊1800ma構造背景提供新的資料。
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。
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征。
Under the cooperation of lifts and mantle fluids , the melting point of mantle peridotite fell , and then , extensive melting took place in the enriched mantle , which resulted in the appearance of abundant mafic dikes , ultramafic dikes and contemporaneous volcanic rocks in shandong province 綜合堿性超基性脈巖和已知的青山組的火山巖、基性脈巖年齡數據，認為山東地區中生代地殼拉張至少存在四次：即約80ma 、 100ma 、 120ma和140ma 。
Compared with jianchaling nickel sulflde deposit , jinchuan superlarge copper - nickel sulflde deposit mostly related with mafic - ultramafic complex that multiple intruded , spatially respected with old huabei block , which formed in marginal rift in middle - new proterozoic 與煎茶嶺鎳礦床相比，金川超大型鎳銅硫化物礦床主要與多次侵入的鎂鐵?超鎂鐵質雜巖有關，空間上與時代相對較老的華北地塊關系密切，形成于中?新元古代的邊緣裂谷。
The project continued to provide essential technical assistance and training to the mafic institution in support of its role as a nationally designated reference laboratory for specific analysis and training in relation to feed and food safety programs 中加飼料工業項目將繼續為農業部飼料工業中心提供必要的技術支持和培訓，以支持“中心”更好地參與飼料和食品安全計劃，以及作為國家認可的實驗室開展有關的分析檢測工作。
It also conducts basic research plus concentrates on applied research projects to address specific problems that have been identified by the feed industry . in addition , mafic provides technical services , training and extension courses , information technology through its website 技術文獻資料室數據庫和質量控制手段包括飼料分析與最低成本日糧配方來為行業提供各種技術服務培訓和技術推廣課程以及信息技術。
In addition , the mafic dykes of hainan island were formed in an intraplate extensional environment , similar to the mafic dykes in north guangdong and fujian coastal areas , all suggesting an extension regime tectonic in southeastern china during cretaceous 白堊紀基性巖脈( 81 135ma )形成于板內拉張環境，與粵北、福建沿海地區的白堊紀基性巖脈共同指示了中國東南部白堊紀時期處于拉張的構造環境。
Therefore , based on the isotopic chorology , petrochemistry , geochemisty and sr , nd , pb isotope , the ph . d dissertation mainly studied some yanshanian mafic dikes , volcanic rocks and alkalic - ultramafic dikes in shandong province 本論文主要從同位素年代學、巖石化學、地球化學和sr ? nd ? pb同位素方面對山東地區燕山期基性脈巖、火山巖和堿性超基性脈巖進行了系統研究。
In contrast , mafic volcanoes , which range from small cinder cones to large shield volcanoes like north sister and belknap crater , are typically short - lived ( weeks to centuries ) and erupt less explosively than do composite volcanoes 相反，鐵鎂質的火山，從小的煤渣圓堆到大的盾形火山，像北峰和貝爾克奈普坑，形成期還很短，比復合體的火山更少爆發。

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mafic

mafic adj.【地質學；地理學】(火成巖的)鎂鐵質。

mafiosi