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地球化学约束
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  “地球化学约束”译为未确定词的双语例句
     GEOCHEMICAL CONSTRAINTS ON THE PARTIAL MELTING OF DABIE SUBDUCTED BLOCKS DURING UHPM PROCESS
     大别超高压变质过程中部分熔融作用的地球化学约束
短句来源
     Tectonic settings of the volcano-sedimentary rock association from Xixiang Group, Shaanxi province: volcanic rock geochemistry constraints.
     陕西西乡群火山-沉积岩系形成构造环境:火山岩地球化学约束
短句来源
     Geochemistry Constrains on Rock Association of UHP Terrane during Exhumation
     大别—苏鲁超高压地体折返过程中岩石组合演化的地球化学约束
短句来源
     Based on analyses of major and trace elements of Permian volcanic rocks in Santanghu basin,this paper attempts to clarify the palaeo-tectonic setting more objectively and also provides independent evidence for understanding the nature of the basin.
     本文通过对位于新疆东北部边缘的三塘湖盆地二叠纪火山岩常量、微量元素的分析测试及讨论,为恢复二叠纪盆地性质与古构造环境提供岩石地球化学约束
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  相似匹配句对
     GEOCHEMICAL POTENTIAL
     地球化学
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     Punishment to the violation of thecontract are three kinds: fine, mortgage on the loan and law restrain.
     法律约束
短句来源
     THEORY OF CONSTRAINTS
     约束理论
短句来源
     Geochemical analysis
     地球化学分析
短句来源
     GEOCHEMICAL CONSTRAINTS ON THE PARTIAL MELTING OF DABIE SUBDUCTED BLOCKS DURING UHPM PROCESS
     大别超高压变质过程中部分熔融作用的地球化学约束
短句来源
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Dong Shuwen holds that the metallogenic magma in the iron-copper metallo genic belt of the middle-lower reaches of the Yangtze River was produced by anatexis of crustal materials during the collision between the North China block and the Yangtze block in the Mesozoic. The authors consider that the grounds of Dong's paper are insufficient. First, Dong proposed two sutures, one of which is the Dabie Mrs. suture. In fact this suture does not exist; for there were neither two metallogenic magma series nor the iron-copper...

Dong Shuwen holds that the metallogenic magma in the iron-copper metallo genic belt of the middle-lower reaches of the Yangtze River was produced by anatexis of crustal materials during the collision between the North China block and the Yangtze block in the Mesozoic. The authors consider that the grounds of Dong's paper are insufficient. First, Dong proposed two sutures, one of which is the Dabie Mrs. suture. In fact this suture does not exist; for there were neither two metallogenic magma series nor the iron-copper metaUogenic belt there. As for the other suture—the Yangtze "suture" which is considered by Dong as a the magmatic metallogenic belt, no evidence for the existence of a Mesozoic collision-orogenic belt can be found there. This shows that the collision has no relation to the rock and ore formation. Secondly, Dong's suggestion that iron-forming rock series was formed by anatexis of the basement of the North China block and the copperforming rock series by anatexis of the Yangtze basement want geochemical evidence. In composition, iron-forming rock series and copper-forming rock series are more basic than basement of the North China block and basement of the Yangtze block, respectively; furthermore; the content of fusible components tend to be lower and that of the refractory components higher. These are in contradiction with anatexis. Third, the proposed Nd(T)=6.5 to 9.2 serving as the evidence of anatexis of the continental crust is refutable at the prerequisite of the unclear mantle nature, because intermediat-acid magmatic rocks with Nd(T)=-8 or so can also be derived from primitive mantle or enriched mantle.

董树文提出长江中下游铁铜矿带成岩系列和成矿物质源于中生代华北地块和扬子地块的碰擅重熔。本文根据许多基本地质事实,分析了成矿带与缝合带的关系;华北地块和扬子地块基底重熔的地球化学约束,Nd同位素比值与上地幔性质问题;Pb同位素信息等,以对董文提出的长江中下游铁铜矿带成岩成矿物质来源于大陆碰撞重熔说提出质疑。

The study on the Permian dynamic background of northeast Xinjiang has gained more consideration.Based on analyses of major and trace elements of Permian volcanic rocks in Santanghu basin,this paper attempts to clarify the palaeo-tectonic setting more objectively and also provides independent evidence for understanding the nature of the basin.The volcanic rocks are dominated by basalts,diabases,andesite-basalts and with minor dacites and rhyolites,which are fallen into sub-alkaline series.Major elements show...

The study on the Permian dynamic background of northeast Xinjiang has gained more consideration.Based on analyses of major and trace elements of Permian volcanic rocks in Santanghu basin,this paper attempts to clarify the palaeo-tectonic setting more objectively and also provides independent evidence for understanding the nature of the basin.The volcanic rocks are dominated by basalts,diabases,andesite-basalts and with minor dacites and rhyolites,which are fallen into sub-alkaline series.Major elements show the characteristics with higher titanium(Ti=1.54~2.68).LREE/HREE ratio are varying range from 3.8 to 10.40.Different volcanic rocks are all enriched in LREE without obviously Eu anomaly(δEu=0.92~1.13).LILE are enriched in the basahs.Nb and Ta relative to La deplete strongly and show“TNT”negative anomaly.This type of volcanic rocks shows not only the signature of within-plate setting,but also that of subduction zone,which are similar to the some characteristics of“lagged arc volcanic rocks”,but lack CFB element.Combining with the regional geological data,we conclude that the Permian magmatic activity of the study area generated in an extensional setting of the late stage of orogenesis.

对新疆东北部地区二叠纪构造动力学背景的研究,前人已经做过很多工作,但争议较大。本文通过对位于新疆东北部边缘的三塘湖盆地二叠纪火山岩常量、微量元素的分析测试及讨论,为恢复二叠纪盆地性质与古构造环境提供岩石地球化学约束。研究区内火山岩主要岩石类型为玄武岩、安山玄武岩、辉绿岩、安山岩以及少量英安岩和流纹岩,显示亚碱性系列特征。玄武岩常量元素总体显示高Ti的特征,轻、重稀土元素分馏明显,含量比值(LREE/HREE)在3.8和8.35之间变化,不同岩石类型均具有LREE富集的特征,玄武岩和玄武安山岩Eu异常不明显(δEu=0.92~1.13);微量元素LILE富集,Nb、Ta相对于La强烈亏损,具有较明显“TNT”负异常,不相容元素丰度并不很高,判别图解投入板内玄武岩及火山弧玄武岩区域,总体上既显示板内的构造环境,又携带俯冲带地球化学信息,与“滞后弧火山岩”特征类似,但是缺少CFB端元,综合区域地质特征及前人的研究结果,新疆北部地区晚石炭世至二叠纪处于造山后期伸展裂陷的构造背景。

 
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