幔殼巖 的英文怎麼說
中文拼音 [mànkéyán]
幔殼巖
英文
mantle-crust mix
-
幔 :
名詞(遮擋用的簾子) curtain; screen
-
巖 :
名詞1. (巖石) rock 2. (巖峰) cliff; crag
-
Based on the studies of petrotexture, structural deformation and the relevant metamorphism, this paper indicates that this peridotite massif is the product of ultramafic magma cumulated at the crust - mantle transtion zone and has undergone the early stage of plastic deformation under the condition of granulite facies ( 800 ) and late ductile shearing at amphibolite and greenschist facies in relevance to uplifting
本文通過
巖體的結構、構造變形及相應的變質作用研究,提出了該橄欖
巖體是由超基性
巖漿在
殼幔過渡帶結晶而成,並經歷了與圍
巖一致的麻粒
巖相( 800 )條件下的早期塑性變形以及角閃
巖相和綠片
巖相退化變質條件下與逆沖上升有關的韌性剪切變形。
-
Amore 2001 has successfully investigated the gakkel ridge and arctic ocean in vicinity of its geological and geophysical nature, as well as the nature of sea ice and biology in this area. the preliminary onboard petrology and bathymetry results show that the mantle beneath the gakkel ridge with low temperature has only encountered very low degree partial melting during the spreading and there is no any direct relationship between the crust nature and the spreading rate along the gakkel ridge in any simple petrologic way. mantle temperature and fracture zone density also play a major role on the crust nature, besides spreading rate
對所取得資料的初步研究表明gakkel洋中脊之下的地
幔僅經受了較低程度的部分熔融,具有較低的溫度。 gakkel洋中脊處的地
殼性質和
巖漿活動與擴張速率之間不存在任何直接的
巖石學相關性,擴張而導致的
巖石圈頂部的冷卻並不是決定洋脊處地
殼性質的最重要因素。地
幔溫度和斷裂帶的存在與否及其密度對地
殼性質具有重要的影響意義。
-
Granites belong to s - type granite, but the biotite granite was affected by the mantle or mantle fluid
黑雲母花崗
巖是
殼源花崗
巖但又受到
幔源
巖漿或
幔源流體的影響。
-
Thus, the paper focuses on mineralogy, petrology, petrogeochemistry, isotopic chorology, and sr - nd - pb isotopes of the mafic intrusions and dikes in fujian province, se china. in addition, we also discussed the process of the plate subduction, mantle evolution, crust - mantle interaction, lithospheric thinning and extension, and the reaction for crustal extensi on in fujian province, se china. ( 1 ) daiqianshan mafic intrusion is situated along the changle - nanao fault, which intruded in the metamorphic rocks
基於此,本文以中國東南部福建省的基性脈
巖、
巖體為研究對象,運用系統的礦物學、
巖石學、
巖石地球化學、同位素地球化學及同位素年代學證據,詳細論述了晚中生代中國東南部板塊俯沖、地
幔演化、
殼幔相互作用及
巖石圈伸展減薄的地球動力學過程,探討了地
殼拉張期次在福建省區域構造上的響應。
-
There is a north - north - east negative anomaly belt of aerial magnetism in the middle - east part of the basin, which could be displayed by the aerial magnetism of commutative field, upwardly continuation, lvt in earthquakes, the experimentation of granite liquation ( demagnetization ), the distribution of neozoic era volcanic rock, earthquake, hot spring and ground feature. the anomaly shows the blocking in east - west direction, and it is also associated with intense activity of deep heat interaction and the development of the crust - mantle mixed layer in the north qiangtang
從區域航磁、向上延拓、地震低速層、花崗
巖熔融(退磁)實驗、新生代火山
巖的分佈、地震、溫泉、地貌等發現,盆地中東部存在一北北東向航磁負異常帶,既顯示出東西分塊,也與北羌塘深部熱力作用強烈活動、發育「
殼幔混合層」有聯系。
-
The ophiolite massifs are composed of mantle peridotite that is mainly harzburgite and dunite, and lacked of crust magmatite within the typical ophiolite suite
摘要該蛇綠
巖帶的
巖體由地
幔橄欖
巖組成,主要
巖石類型是方輝橄欖
巖和純橄欖
巖,缺少典型蛇綠
巖剖面中的洋
殼單元。
-
Secondly, based on the microbeam analytical technique, on the one hand, through investigating the characteristic of major elements in the mantle minerals the author acquired the static information from mantle ; on the other hand, through multi - point analysis of a part of the minerals from mantle, the auther got dynamic information from mantle. finally, generalizating the fruits of this study and predecessors, the autor holds that the constituents of lithospheric mantle possibly includes spinel lherzolites, clinopyroxenites, websterite, dunite, harzburgites, garnet lherzite, phlogopite lherzite, eclogites, clinopyroxene megacrysts ; compared with east china and north china platform, the research field mantle shows the characteristics of higher degree of partial melting processes and more depleted mantle ; the. upper mantle beneath north hetian area is heterogeneous, with a tendency of deficit in a12o3 and lree from kaliyang in west hetian to the river basin of kalakshi river and yulongkashi river ; the subduction of the crust beneath north hetian has ever occurred in geological history and caused the mixing of mantle - crust ; the depth of the origination of basaltic magmas beneath north hetian exceeds 73km ; the thickness of the lithosphere beneath the research area amounts to 204. 9km ; the mantle beneath north hetian has geological condtions for forming diamond deposits
最後,綜合本區
幔源礦物和地
幔巖石的特徵以及地球物理資料,得出如下結論:本區上地
幔的物質組成有尖晶石二輝橄欖
巖、二輝
巖、單斜輝石
巖、純橄欖
巖、方輝橄欖
巖、石榴石二輝橄欖
巖、金雲母二輝橄欖
巖、榴輝
巖;與中國東部以及華北地臺上地
幔相比,研究區上地
幔具有富集主元素中相容元素和虧損其中的不相容元素的特徵,局部熔融程度較高;上地
幔存在橫向和縱向的不均一性,從西部的克里陽到喀拉喀什河和玉龍喀什河流域, al和lree富集程度呈下降趨勢,不同來源的相同礦物中主元素的含量差異較大;地質歷史時期這里可能發生過地
殼俯沖並產生
殼幔混合作用;玄武
巖漿的起源深度73km ;從
幔源重砂礦物的溫壓估算結果,可以推斷出
巖石圈厚度可達204 . 9km ;綜合
巖石圈物質組成特徵、
巖石圈熱狀態、地
幔溫壓狀態、氧逸度以及
幔源
巖石和
幔源礦物的化學成分,認為研究區具備了金剛石成礦地
幔地質條件。
-
And apatite. by these analyses and comparison with general granite both in china and the world and with the granite in other au or cu belt in china, the characteristics of the granite in this area are concluded as follows. it belongs to magnetite - i or syntectic granite and has crust - mantle mixed characteristics ; it was formed mainly by crystallization differentiation of melting magma and multiphase varied intrusion ; the degree of differentiation evolvement is not high ; the granite and its enclaves p. re congenetic ; the range of temperature is about 500 - 700, the range of pressure is about 2. 50 gpa - 4. 35 gpa, and the range of oxygen fugacity ( lg fo2 ) is - 15. 53 - - 14. 00 ; most granite bodies formed before the collision of plates, and few formed after the collision of plates
通過對測試數據的分析與綜合研究,並同中國和世界一般花崗
巖類以及中國主要金、銅成礦
巖體的花崗
巖類進行對比,得出本區花崗
巖類
巖石具有以下特徵:屬磁鐵礦-型或同熔型花崗
巖,其
巖漿物質具
殼幔混源特徵:主要由熔融態
巖漿經結晶分異作用,通過多期變速上侵而形成;其分異演化程度較低;寄主
巖基和包體具有同源性;
巖石的形成溫度范圍約為500 - 700 ,壓力大約為2 . 50gpa - 4 . 35gpa ,氧逸度值1gfo _ 2為- 15 . 53 ? 14 . 00 ;該
巖帶主要形成於板塊碰撞前消減的活動板塊邊緣期,為燕山至喜馬拉雅早期的大陸邊緣火山弧環境的產物。
-
By physiognomy feature, it could be divided into three types of thermal structure : positive dome model, negative collapse model and border dome core collapse model. based on the depth degree or magma - thermal influenced, it could be divided into five types of thermal structure : ( ancient ) geothermal anomaly focus region model, superficial volcano eruption hydro - thermalism and hypabyssal intrusive model, thermal anticline ( thermal dome ) model, mid - deep intrusive model, deep mantle ( crust ) thermal plume model ; and put forward a perfect model of the thermal structure. there are many interaction system could be induced into a systematic thermal interaction, include : ocean - continent system, basin - mountain interaction, superficial and mid - deep crust - mantle interaction, crust - mantle commingle interaction, vertical thermal interaction ( delamination ) etc.
依據地貌形態分為三類:正向穹窿型、負向塌陷型、邊隆核陷型:依據
巖漿-熱力作用影響的深淺程度或深度分為五類: (古)地熱異常群集區、表淺層火山噴發-熱液活動與淺成侵入型、熱力背斜(熱穹窿) 、中深層侵入型、深部地
幔(地
殼)熱柱型;提出了熱力構造作用空間分佈的理想模式,將洋陸系統、盆山作用、淺表與中深部
殼幔作用、
殼幔混合、垂向熱力作用(拆沉)等納入一個整體統一的熱力作用系統中,為盆地動力學研究打開了一個新窗口;研討了熱力構造研究方法。
-
Due to the subduction of pacific palte under eurasian in early cretaceous, at about 140 ma, fast collapse ( delamination ) took place and the mantle plume emerged, both resulted in the large - scale crustal extension in ludong
3 、富集地
幔源區( em1 )的產生是俯沖並熔融的揚子下地
殼物質進入華北
巖石圈地
幔並與之相互交代作用形成的。
-
Based on affirming mantle plume hypothesis, the authors introduce several 2d or 3d simulation experiments about ridge - plume ( hotspot ) interaction and some examples of hotspot - ridge interactions existing in the three oceans
研究洋脊熱點之間的相互作用對于揭示地
幔動力學、熱點附近洋
殼構造的演變以及與熱點密切相關的洋中脊處的
巖漿熱液活動具有重要的意義。
-
There are distributed a great number of cenozoic basalts and mantle derived xenoliths in north china and south china. for understanding the materials constitutes, evolution, mantle metasomatism, and inhomogeneity of the lower crust and upper mantle, there is a must of doing some research on these host basalts and the xenoliths
華北、華南地區發育大量新生代玄武
巖及
幔源包體,對其進行研究,有利於進一步深入了解下地
殼和上地
幔的物質組成、演化、地
幔交代和不均一性以及地球物理反演結果的可靠性等。
-
Through the study of characteristic of macroelement, microelement, rare - earth element, oxyhydrogen isotope, sulfur isotope, lead isotope, fluid inclusion etc, a conclusion can be drawn that metallogenic substance comes from the upper mantle with mixing of some substance from the upper crust latter. it is likely to have the same source with the surrounding rock
通過對礦床的常量元素、微量元素、稀土元素、流體包裹體特徵、氫氧同位素、硫同位素、鉛同位素等特徵的研究,認為成礦物質主要來源於上地
幔,與周圍
巖石存在著同源的可能性,後期有一定的上地
殼物質混入,成礦作用有三期,分別與區內的花崗
巖、二長花崗
巖脈、雲煌
巖脈有關。
-
These studies, therefore, suggest that the songsugou peridotite is not a tectonic massif of the upper mantle but a ultramafic magmatic rock body crystallized in deep crust and tectonically emplaced in the upper crust
從而證明了松樹溝橄欖
巖體並不是上地
幔巖石的殘片,而是由
巖漿在深部地
殼環境下結晶而成並以固態構造侵位於地
殼的上部。
-
Geophysicists had already cognizance of that the pervasive velocity anisotropy with varying degree in the mantle or the sedimentary rock of upper crust is an important physical property. almost all existed research works fasten on those transversely isotropic media with vertical or horizontal axis of symmetry ( ti ).,
地球物理學者已認識到從地
幔到地
殼上部的沉積
巖存在著不同程度的各向異性,且對具有垂直或水平對稱軸的橫向各向同性介質( ti )有很多的研究。
-
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。
-
Alkali basite, which came from upper mantle or lower crust, invaded through those structure, which not only bring cu et al mineralizing elements, but also the most important is that thermal energy. it cycled the formation water ( yinmin fonnation and luoxue formation ), and form alkali - rich, middle - high temperature and salinity fluid mixed with alkali - rich magmatic water. there were high rate of percolation and well voidage in the contact zone between yinmin purple stratum and yinmin rubblerocks, which is in favor of the transposition and mineralization of minerogenetic fluids
因此,總結東川稀礦山式銅礦成礦模式為沉積( fe 、 cu ) ?熱液疊加( cu )改造:晉寧-澄江期,小江深大斷裂發生走滑運動,在東川礦區造成右行旋扭及其派生構造,形成「 z 」字形落因破碎帶,同時來自深源(下地
殼或上地
幔)堿基性
巖漿侵入,不僅帶來了大量cu等成礦物質,更重要的是提供了熱源,促使地層水(落雪組白雲
巖和因民組紫色層)循環,與富堿( na和k )
巖漿水混合,形成富堿中高溫高鹽度流體。
-
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。
-
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。
-
The authors hold that the joint actions of numerous factors such as the upper mantle uplifted zone ( the mantle thinned zone of lithosphere ), the upper mantle anomalous area ( relatively low - velocity area ), the uplifted zone of intracrustal high - conductivity layer, the deep fault ( shear zone of lithosphere ), the margin of the crust - upper mantle uneven masses, the basement uplifted area reflected by gravity high, the magmatic belt and tectonic intersection reflected by skipped magnetic field, control the distribution of auriferous skarn deposits and copper ( associated with gold ) skarn deposits
作者認為,上地幔隆起帶(巖石圈地幔減薄帶) 、上地幔異常區(相對低速區) 、殼內高導層隆起帶、深斷裂(巖石圈剪切帶) 、地殼上地幔不均勻性塊體的邊緣、重力高反映的基底隆起區、跳躍磁場反映的巖漿巖帶和構造交匯處等諸多因素的共同作用控制著含金夕卡巖礦床和銅伴生金夕卡巖礦床的分佈。