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a tectonic setting of island arc
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  形成于岛弧环境
     Nb and Zr anomalies, the slope of the incompatible element distribution patterns and the Zr/Nb value, the correlations between Vi and Ti, Y and Cr, Zr and Ti-Sr, Zr and Y show island arc signatures, indicating a tectonic setting of island arc .
     根据微量元素蛛网图的斜率和Nb、Zr异常情况以及低的Zr/Nb比值、V Ti、Y Cr、Zr Ti Sr、Zr Y相关性 ,认为斜长角闪岩之原岩为岛弧型玄武岩 ,周潭群的原岩形成于岛弧环境
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  “a tectonic setting of island arc”译为未确定词的双语例句
     It is deposited under a tectonic setting of island arc and active continental margin (back arc or within arc spreading basin) during orogeny according to the primary research.
     初步研究显示,琼西抱板群变质沉积岩可能是造山带岛弧和活动大陆边缘区(扩张弧后或弧间盆地)大地构造环境下的沉积产物。
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  相似匹配句对
     The tectonic setting is granite in volcanic arc.
     具有壳幔混合产物的特征。 构造背景为火山弧花岗岩。
短句来源
     Tectonic Setting and Prospects of Porphyry Copper Deposits in Zhongdian Island Arc Belt
     中甸岛弧带构造格架及斑岩铜矿前景
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     The tectonic setting of flysch from Angzanggou Formation is a back-arc foreland basin.
     沉积地球化学特征揭示的沉积大地构造背景为弧后前陆盆地背景,与碰撞后的大地构造背景相吻合。
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     On "Setting a Model
     论“树典型”──对一种计划经济体制下政府行为模式的社会学研究
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     The geochemical signatures show that the volcanic rocks in the Jingzhushan Formation were formed in the island-arc environment as crustal thickening-melting products in a compressional tectonic setting.
     地球化学特征表明,竟柱山组火山岩形成于岛弧构造环境,是挤压背景下地壳增厚熔融的产物。
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  a tectonic setting of island arc
The characteristics of geochemistry indicate that the bash of the Huashan ophiolite are similar to mid-oceanic ridge basalts (MORB) formed in an initial oceanic baain, and the Xiaofu volcanic rocks are formed in a tectonic setting of island arc.
      


The Baoban Group metasedimentary rocks are composed of muscovite quartz schist and quartz two mica schist. Their protoliths are sandy and argillaceous sediments intermingled with volcanic materials. The difference of geochemical compositions between the two schists is due to the chemical differentiation of the original sediments. The evidence of major and trace elements (including REE) as well as Sm Nd isotope of the rocks shows that there existed an early or earlier than Palaeoproterozic crust in western...

The Baoban Group metasedimentary rocks are composed of muscovite quartz schist and quartz two mica schist. Their protoliths are sandy and argillaceous sediments intermingled with volcanic materials. The difference of geochemical compositions between the two schists is due to the chemical differentiation of the original sediments. The evidence of major and trace elements (including REE) as well as Sm Nd isotope of the rocks shows that there existed an early or earlier than Palaeoproterozic crust in western Hainan, and that the Baoban Group metasedimentary rocks partly originated from antiquity crust materials, and partly from new born crust with more mantle volcanic materials or was related with the largescale orogenic event and the tectonic magmatic activity following the addition of mantle materials. It is deposited under a tectonic setting of island arc and active continental margin (back arc or within arc spreading basin) during orogeny according to the primary research.

琼西中元古代抱板群变质沉积岩可分为白云母石英片岩组和石英二云母片岩组,其原岩为砂岩质泥质沉积岩夹火山物质。白云母石英片岩组和石英二云母片岩组在地球化学成分上的差异是原始沉积化学分异作用的结果。对主元素、微量元素(含稀土元素)及Sm-Nd同位素的综合研究表明,海南岛存在古元古代或更早的古老基底,抱板群变质沉积岩一部分来源于成熟度较低的古老地壳物质,另一部分来源于含地幔火山物质较多的初生地壳,或与研究区大规模造山运动、构造-岩浆活动所伴生的地幔物质加入有关。初步研究显示,琼西抱板群变质沉积岩可能是造山带岛弧和活动大陆边缘区(扩张弧后或弧间盆地)大地构造环境下的沉积产物。

The basic assemblage of amphibolites consists of amphibole and plagioclase. Other phases include biotite, quartz and alkali feldspar. All amphibolites show the characteristics of the tholeiitic series. The amphibolites are all quartz-normative. Relatively flat REE patterns, slight depletion in LREE and Eu , resembling those of the N-type MORB and low-K tholeiitic rocks in oceanic arc and back-arc basin settings. Nb and Zr anomalies, the slope of the incompatible element distribution patterns and the Zr/Nb value,...

The basic assemblage of amphibolites consists of amphibole and plagioclase. Other phases include biotite, quartz and alkali feldspar. All amphibolites show the characteristics of the tholeiitic series. The amphibolites are all quartz-normative. Relatively flat REE patterns, slight depletion in LREE and Eu , resembling those of the N-type MORB and low-K tholeiitic rocks in oceanic arc and back-arc basin settings. Nb and Zr anomalies, the slope of the incompatible element distribution patterns and the Zr/Nb value, the correlations between Vi and Ti, Y and Cr, Zr and Ti-Sr, Zr and Y show island arc signatures, indicating a tectonic setting of island arc .The basaltic magma was derived from a slightly depleted mantle source with minor crustal contamination.

周潭群斜长角闪岩的基本组成矿物是斜长石和角闪石 ,不同样品中还可以出现黑云母、石英和碱性长石等。所有斜长角闪岩显示石英拉斑系列特征 ,其稀土元素配分曲线呈平坦型 ,显示轻微的轻稀土亏损和Eu亏损 ,与由岛弧及洋拉斑玄武岩形成的斜长角闪岩的稀土分布型式及稀土特征一致。根据微量元素蛛网图的斜率和Nb、Zr异常情况以及低的Zr/Nb比值、V Ti、Y Cr、Zr Ti Sr、Zr Y相关性 ,认为斜长角闪岩之原岩为岛弧型玄武岩 ,周潭群的原岩形成于岛弧环境。元素地球化学和Nd同位素特征指示它们的母岩浆起源于亏损程度低的地幔或来源于亏损地幔的岩浆受到地壳物质的混染。

There are three lithostratigraphic units of Permian-Triassic strata in Pingxiang area with varied formational settings:1)plateform-type sediments aging from Carboniferous to Early Triassic,which may comprehend an accreted submarine plateau in the Paleotethyan ocean;2)the Luolou Group,the Baifeng and Hekou Formations aging of Early-Middle Triassic consisting of volcaniclastic trubidites sandwiched with intermediate-acidic lavas,standing for an active continental margin;and 3)the Lower Permian strata of...

There are three lithostratigraphic units of Permian-Triassic strata in Pingxiang area with varied formational settings:1)plateform-type sediments aging from Carboniferous to Early Triassic,which may comprehend an accreted submarine plateau in the Paleotethyan ocean;2)the Luolou Group,the Baifeng and Hekou Formations aging of Early-Middle Triassic consisting of volcaniclastic trubidites sandwiched with intermediate-acidic lavas,standing for an active continental margin;and 3)the Lower Permian strata of deep-marine facies,associated with intermediate-basaltic lava and ultramafic rocks,being survived in a nappe-outlier thrust onto the former two units.The petro-chemical features indicate that the volcanic lava was low-potassium tholeiite,erupted in a tectonic setting of island-arc which might be situated in north Vietnam originally.The basalts along Yangxü-Badu represented a passive continental margin in Early Permian.Both the island-arc and passive continental margin might have migrated towards the northeast during Early-Middle Triassic.Namely,the Indosinides bordering China and Vietnam should be a Turkic-type orogen.

广西凭祥地区有 3种不同建造背景的二叠三叠系。深水相的下二叠统呈一飞来峰推覆在台地型的石炭纪早三叠世沉积和早中三叠世浊积岩上 ,与前者共生的基性 -超基性岩是古特提斯岩浆弧的记录 ,当时的被动大陆边缘在百色阳圩田林八渡 ,说明洋壳向南西消减 ,早二叠世弧的原形成位置可能在越南境内 ,早 -中三叠世的弧则已向北东迁移 ,在中越交界区形成图尔基式造山带。

 
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