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gneiss n.【地質學;地理學】片麻巖。-ic, -y adj.

gneissoid

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。

Based on the reservoir bank protection project , the reconnaissance design , the construction , distortion slope body technical and so on , and according to the ecological prospecting and the forecast appraisal achievement of mountainous area reservoir runned for many years , through actual investigation of the collapses of the bank , the distribution distortion , the types and forming conditions , the collapses formation mechanism of the bank and the types of the pattern are analyzed , and of the bank collapsing parameter of each kind of gneiss under and above water stable angle of slope and so on are confirmend 摘要利用已運行多年的山區型水庫地質勘探、預測評價成果,在掌握庫岸防護工程的勘察設計、施工及變形坡體的監測等技術資料的基礎上,通過對塌岸及變形的分布、類型及形成條件等方面問題的實測調查,分析塌岸效應的形成機制及模式類型,確定各類巖土體的水下及水上穩定坡角等塌岸參數。

And we have got the following result : 1 . the technique of storing water in soil in gneiss area of tai - hang mountain : the more water in soil before rain is , the less water capability of soil is , the time shorter of water flowing from soil is , the easier the water flows on the ground ; the soil capability of reserving water of different soil thickness is terrace > acacia land > pine land > grass land , so the soil is more thick , the soil capacity which contains water is more large ; the accumulated water that flows on the ground is remarkable related with the logarithms of rain time 太行山片麻巖區土壤蓄水規律:雨前土壤含水量越高,土壤可蓄水量越小,出流所需時間越短,容易形成地表徑流;不同土層厚度的土壤蓄水量為:梯田刺槐林地油松林地草地;累積地表徑流量與降雨時間的對數呈顯著正相關,擬合方程為w = a + blnt ,相關系數均大于0 . 92 ,即在降雨強度一定的前提下,降雨時間越長,累計地表徑流量越多。

The technique of water conservation in gneiss area of tai - hang mountain : on the facet of water conservation measure , four sorts of water conservation measures can all improve the soil water content . the result of straw mulch is best , using water holding agent in soil and plastic mulch are better , stone mulch is worse . four sorts of water conservation measures all improve the physical character of surface layer soil 太行山片麻巖區保水技術:在保水措施方面:四種保水措施均能提高土壤含水量,秸稈覆蓋的效果最好,土施保水劑和地膜覆蓋的效果其次,石塊覆蓋的效果較差;四種保水措施使表層土壤的物理性狀均有一定改善,使土壤容重降低、孔隙度和土壤飽和含水量增加。

Abstract : to the principle and project that tu guangazhi proposed in 1990 , the gold ore deposits in qinling ( shaanxi ) may be classified into fouowing types : archean high - grade gneiss type , fine grained fragmental rock - carbonate rock - silicilith type , metamorphic fragmental rock type , volcanic rock type , explosive breccia type , intrusive rock exo - and endo - contact zone type . inthis paper , the geological characteristics , metallogenic geological setting , the source of ore - forming materials , digenic mechanism and metallogenetic epoch of gold ore deposits are also discussed 文摘:參照涂光熾先生( 1990 )提出的礦床類型劃分原則與金礦分類方案,將陜西秦嶺地區原生金礦劃分為太古界綠巖建造型、細碎屑巖-碳酸鹽巖-硅質巖建造型、變質碎屑巖型、火山巖建造型、隱爆角礫巖型和侵入巖內外接觸型金礦,并對各類型金礦的地質特征、成礦地質背景、成礦物質來源、礦床形成機制及形成時代等問題進行了論述和討論。

The lithology of c petrofabric is marble , accidental gneiss . by field attitude , rock association character , petrography and petrochemistry , we know that the protolith of a petrofabric is mainly composed of pelite , sandstone and basic to acidic volcanic , that of b petrofabric mainly a suite of pelite , sandstone ( maybe include volcanic ) , and that of c petrofabric mainly limestone , impurity limestone , a few of pelite and pyroclastic rock A巖組的巖性主要是各種角閃巖類和片麻巖類夾有片巖,偶有變粒巖、大理巖。 b巖組的巖性主要是各種片巖夾有大理巖、石英巖。 c巖組主要是一套大理巖,偶有片麻巖。

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。

In order to ameliorate the status of water shortage and improve the economy development of this area , the technique of rain harvesting and water conservation in gneiss area of tai - hang mountain have been studied by the experiment of rain and the experiment of the investigation in the field 為了改善該區干旱缺水的現狀,促進當地的經濟發展,以人工模擬降雨和野外觀測試驗相結合的方法,進行了太行山片麻巖區集雨保水技術的研究。得到了如下結果: 1

In gneiss area of tai - hang mountain of hebei province , the rainfall of each year is small , and the allocation of rainfall is not equality , 80 percent of rainfall is in summer . this is the main reason of drought in this area , which makes the entironment fragiled 河北省太行山片麻巖山區年降雨量小,且雨量分配不均, 80集中在夏季,這是造成該區干旱缺水、生態環境脆弱的主要原因,而干旱缺水已成為限制該區經濟發展的最主要因素。

According to representative section , tectono - stratigraphic unite , rock association character , beidahe group is divided a , b , c petrofabrics . the lithology of a petrofabric is amphibolite , gneiss interlated with schist , accidental marble . the lithology of b petrofabric is schist interlated with marble , quartzite 根據代表性剖面的研究,在構造巖石地層單位序列劃分變質地層的原則指導下,按變質巖石組合特征劃分了a 、 b 、 c三個巖組。

From hydrogeology the authors study distributive characteristics and hydrogeological characteristics of nappe gneiss , mineral water quality and reserves , theoretical feasibility of developing gneiss mineral water and the problems which remain to be researched 從水文地質角度,對推覆體片麻巖的分布特征、水文地質特征、水質及儲量進行分析研究,從而提出開發片麻巖礦泉水的理論可行性和有待于進一步研究的問題。

They decrease soil bulk density , increase soil porosity and soil saturated water content . the result of straw mulch is best , plastic mulch is better . the movement of soil water in gneiss area of tai - hang mountain has following regulation 其中以秸稈覆蓋的效果最好,其次為地膜覆蓋;太行山片麻巖區土壤水分運動有如下規律,土壤含水量隨土壤深度的增加而逐漸降低。

Polylactic acid ( pla ) of different molecular weights were synthesized by the direct condensation of lactic acid with modified gneiss as the catalyst , or with modified gneiss and stannous caprylate as the catalyst in the same reaction conditions and different reaction times 摘要以天然礦石改性片麻巖為聚合反應的催化劑,通過直接縮聚方法制備了不同分子量的聚乳酸。

A preliminary study on laws of soil and water losses in gneiss , which is the main type of rocks in taihang , was carried out in this paper on the bases of examination data , survey of flood and historic statistic data 根據試驗觀測數據和洪水災害考察結果,結合歷史統計資料,對河北太行山的主要類型巖石片麻巖低山區的水土流失特點進行了初步研究。

According to this experiment , there are 100m2 of rain - harvesting acreage , then 3m3 rain harvesting pool will be built correspondingly in gneiss area of tai - hang mountain . 3 根據本試驗研究,在太行山片麻巖區,每100m ~ 2的集雨面積對應修建容積為3m ~ 3的集雨池,便能取得較好的集雨效果。

Millions of years ago , metamorphic schists , gneisses and quartzites formed impressive , flat - topped inselbergs on a vast plain in the shadow of kilimanjaro 百萬年前,變質的石板片麻巖和石英巖,在乞力馬札羅山附近廣闊的平原形成壯觀島嶼似的

Study on the relationship between the soil nutrient elements and the apple fruit quality of the newly reclaimed apple orchard in taihang mountain gneiss area 太行山片麻巖區新墾蘋果園土壤營養與果實品質的關系研究

Preliminary study of overburden breakdown law with full mechanised top coal caving mining under thick and hard gneiss 硬厚片麻巖下綜放采煤覆巖破壞規律初探

Gneiss is called bastard granite 片麻巖叫作粗花崗巖。