mantle-derived magma 中文意思是什麼

mantle-derived magma 解釋
幔源巖漿
  • mantle : n 1 披風，罩衣。2 一層（被覆）幕，蓋罩。3 （煤氣燈）紗罩;【解剖學】外表；【動物；動物學】套膜；（...
  • derived : 導生的
  • magma : n. （pl. magmata , magmas） （礦物，有機物等的）稀糊狀混合物；【地質學；地理學】巖漿；稠液；【藥學】乳漿劑。
  1. 4 ree geochemistry of fluorite, siderite, quartz, magnetite, calcite in ores mainly controlled by ore - forming fluids, in contrasting to those of the metamorphic minerals which controlled by crystal structure. the ore - forming fluids of initial stage show larger lree / hree fractionation than that of later stage. a narrow range of 6 ~ 4s valus for early stage chalcopyrite ( - 0. 3 to 2. 8 ) suggested that s originated from the mantle and the 6 13c and 8 18o valus of siderite range from - 11. 17 to - 15. 37 % and from 8 ~ 9. 1, respectively, it indicates that the c and o of ore - forming fluids were derived from the magma or organogenous sediment

    6 、昆陽群因民組地層中出現的稀土富集、成礦與我國的白雲鄂博稀土ree一fe一nb超大型礦一床和澳大利亞的olympicdamcu一u一au一ag一ree超大型礦一床，在成礦時代、產出大地構造背景、成礦物質來源等方面具有較大的相似性，均體現成礦受控于中元古代1
  2. 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比值接近於球粒隕石和morb值，應為古俯沖帶含水流體交代的地幔源區的產物。
  3. Detailed studies of tectonic unit and mineralized pedigree in each tectonic unit and each period provided that tectonic evolution passed an evolutionary sequence from early extension - transition - late compression that correspond to mineralization - sediment and submarine eruption - exhalation mineralization - moderate to acid magma and tectonic hydrothermalism that are relevant to mantle - derived magma and volcanic activities ; the mineralized pedigree can be indicated as mantle derived - inner basin and deep source - crust source ore - forming materials

    對各時期、各構造單元的成礦譜系進行了詳細研究，提出構造運動演化從早期拉張過渡晚期擠壓的演化序列，分別對應于以幔源巖漿和火山活動有關的成礦作用沉積及海底噴流?噴氣成礦作用中酸性巖漿及構造熱液成礦作用；在成礦物質上由幔源盆內及深源殼源的成礦譜系。
  4. During the yanshanian phrase, the area is in the condition of contractional background, with multi - staged tectonic reversion. 5. through studying the origin of volcanic rocks and the characteristics of magma evolution, it concludes that there exist 3 originated areas of magma - from mantle, crust, and mantle - crust exchange. the basic magma of nandaling volcanic rocks of early jurassic is derived from upper mantle ; the magma of tiaojishan volcanic rocks of mid jurassic is formed in the contractional tectonic setting, and derived from the transition zone of crust and mantle interaction ; the acid magma of l

    5 、通過巖石化學、微量元素、稀土元素的研究，探討了不同級別節律的火山巖成因、巖漿演化等特徵，認為本區燕山期火山巖有三個巖漿源區，即地幔源、地殼源和殼幔混源，早侏羅世的南大嶺旋迴的基性巖漿，起源於上地幔；中侏羅世髫髻山旋迴火山巖是在相對擠壓環境中，巖漿起源於殼幔過渡帶；晚侏羅世無負eu異常的酸性巖漿來源於下地殼的古老結晶基底的局部熔融，有負eu異常的酸性巖漿來源於上地殼的局部熔融；早白堊世火山巖基性巖漿起源於上地幔，中性巖漿起源於下地殼底部的殼幔過渡帶。
  5. The control of the deep - seated structural - magmatic process over the metallogenic system around the middle - lower yangtze river reaches is shown as : ( 1 ) the mantle uplift belt is closely related to the general geological background of the metallogenic system ; ( 2 ) the primitive magma originated from different parts of the mantle uplift belt ( mantle ridge or mantle slope ) shows differences in style of formation and composition and results in different magmatic series and metallogenic subzones, respectively ; ( 3 ) the varying depths of structural - magmatic chambers may form a " three - layered structure " ( central type, network - like and ring - like ) and this is the primary factor that controls the different magmatic series and the concerned cluster of ore deposits ; ( 4 ) the alkaline basaltic magma derived from the mantle ridge forms high - potassium and calcium alkaline magma and shoshonitic magma due to its altering intensity of afc process with the lower crustal material, which has something to do with the copper - gold and iron - sulphur metallogenic subsystems, respectively

    深部構造巖漿作用對長江中下游成礦帶安徽沿江地區成礦系統的控製表現為： （ 1 ）地幔隆起帶與成礦系統的總體地質背景的演變密切相關； （ 2 ）源於地幔隆起帶不同部位（幔脊與幔坡）的原始巖漿，其生成方式和物質組成不盡相同，它們分別產生相應的不同巖漿巖系列和成礦亞帶； （ 3 ）不同深度的構造巖漿房組成中心式網格式環帶式「三層結構」 ，是控制區內不同巖漿巖系列及有關礦床集中分佈的主要因素； （ 4 ）源於地幔隆起帶脊部的堿性玄武巖漿，由於與下地殼物質發生的afc作用強度不同，形成了高鉀鈣堿性巖漿和橄欖安粗巖漿，分別與銅、金成礦亞系統和鐵、硫成礦亞系統有關。
  6. Two ree distributed pattern, lree - depleted and flat, which display a specific character of typical mid - ocean ridge tholeiite, indicate that primary magma may be derived from near primary or a typical large ion lithophile element ( lile ) - depleted mantle

    巖石稀土元素配分模式可分為lree平坦型和lree虧損型兩類，指示了其原始巖漿起源於近原始或典型的大離子元素虧損型的地幔，為典型的大洋中脊拉斑玄武巖的特徵。
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