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机械风化
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  mechanical weathering
     (1)Arid-subarid palaeoclimate was helpful for mechanical weathering of source rocks and torrent forming;
     认为本区沙三段时期满足重力流的形成条件,主要表现在六个方面:(1)干旱-半干旱的气候环境有利于母岩的机械风化和山洪的形成;
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  “机械风化”译为未确定词的双语例句
     The weather progresses can be divided into two stages that are chemistry weathering of matrix and physical weathering of phenocryst. The weathering trend of second stage is contrary to the normal profiles.
     风化过程分为两个阶段,即以化学风化为主导的基质风化阶段和以机械风化为主导的斑晶风化阶段,第二阶段显示出与正常风化剖面相反的风化趋势。
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     Nevertheless, such an element association is only suitable for arid and desert areas and high and cold mountain areas mainly characterized by mechanic weathering and transportation where coarse-grained stream sediment samples are collected.
     但该元素组合仅适用于干旱荒漠区及部分以机械风化、搬运作用为主的高寒山区等水系沉积物采样粒度较粗的地区。
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  相似匹配句对
     Software Machinery
     软件机械
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     Weathering of Tempered Glass
     钢化玻璃的风化
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     and mechanical exfoliation.
     机械剥蚀。
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     THE WEATHERING OF SILICATE GLASSES
     硅酸盐玻璃的风化
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  mechanical weathering
Therefore, the rock fabric and especially the lattice-preferred orientation (texture) of calcite and/or dolomite as the predominant mineral phases in marbles have a significant influence on the mechanical weathering.
      
The effect of mainly mechanical weathering on the granodiorites, granites and quartz diorites of the Cavusbasi area of northwest Turkey are described, the samples having been taken from cores and field exposures.
      
In the study presented here the methane was found to be released from the sand particles by mechanical weathering, caused by the grinding effect of the shaking.
      
In the study presented here the methane was found to be released from the sand particles by mechanical weathering, caused by the grinding effect of the shaking.
      
The clay mineral composition in the latter two basins may be closely related to volcanic activity and mechanical weathering products near and on Antarctica.
      
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Sichuan Province covers an area of 570,000sq.km.,but plateaus,mountainous and hilly regions occupy 97.7% of this area.There is a severe soil and water loss because of the vegetal cover damage, steep slope reclamation and abundant rainfall (about 1,000mm. ) . Soil is being washed away and fertility debsed. Now Sichuan is classified as severe soil erosion zones. I.Principles and bases of classification of soil erosion in Sichuan Province 1 .Principles of classificationa. Classification according to the difference...

Sichuan Province covers an area of 570,000sq.km.,but plateaus,mountainous and hilly regions occupy 97.7% of this area.There is a severe soil and water loss because of the vegetal cover damage, steep slope reclamation and abundant rainfall (about 1,000mm. ) . Soil is being washed away and fertility debsed. Now Sichuan is classified as severe soil erosion zones. I.Principles and bases of classification of soil erosion in Sichuan Province 1 .Principles of classificationa. Classification according to the difference in natural soil erosionagents (water, wind, gravity, temperature, etc) . b.Classification accordingto the influence of soil erosion upon agricultural production and amelioration of soil2.Bases of classification and categories of soil erosion in Sichuan Provincea.In the light of above-named principles,soil eroston can be classified in the following four types:——water erosion——wind erosion——gravity erosion——congelifractionb.Types of soil erosion: ——To the water erosions type belong sheet erosion, etched potholeerosion, piping erosion, secret erosion and karst erosion. ——To the gravity erosion belong slip erosion,avalanche, mud-rockflow, earth-flow, earth fall and earthquake erosion.——Wind erosion——Congelifractionc.There are light erosion, medium erosion, strong erosion and severeerosion according to the degrees of soil erosion. II .A brief exposition of classification of soil erosion in Sichuan;There are purplish soil, paddy soil, chao soil,yellow earth and red earth in the basin of East Sichuan,but most of the area is covered by purple soil. The purple colour is formed of weathered Jurassic sandstone, Jurassic clayshale, cretaceous sandstone and cretaceous clayshale. The purple sandstone is soft, ant the clayshale contains silt particles.They can be weathered,so the sheet erosion is primary. In the paddy field regions the secret erosion is prominent because of moslic.West Sichuan is covered by plateaus and mountainous regions. There the vegetal cover is well preserved, so the water and wind erosion is light, but active earth movement and steep slopes cause strong slip erosion,avalanche,mud-rock flow and earthquake erosion.It is impossible that there is only one kind of soil erosion. The soil erosion in Sichuan is divided into erosion ecotopes in order to give an account for soil erosion conditions in Sichuan Province.

四川省面积为57万平方多公里,丘陵、山地和高原占总面积的97.7%,坡耕地(10°以上)占全省耕地70%左右。由于森林破坏,陡坡开垦,年降雨量1000毫米左右,多阵雨造成严重水土流失,使土层变薄,肥力降低,在全国被列为强度侵蚀区。 一、四川省土壤侵蚀类划分原则、 (一)划分原则、 1.发生学原则:考虑土壤侵蚀营力(水、风、重力、温度等)形成不同的土壤侵蚀类型。 2.生产性原则:土壤侵蚀程度影响土地利用和改良方向。 (二)划分依据及分级单元、 根据以上原则将我省土壤侵蚀类型分成三级、 第一级、土壤侵蚀型:按土壤侵蚀发生成因及性质分为水蚀、重力侵蚀、风蚀、冻融侵蚀等。 第二级土壤侵蚀类:在土壤侵蚀型之下,按土壤侵蚀后地表形态及土壤存留面积划分、水蚀包括面蚀、滑坡、沟蚀,隐匿侵蚀、溶蚀:重力侵蚀包括崩塌、震蚀、泥石流;风蚀;冻融侵蚀包括冰蚀。 第三级土壤侵蚀亚类:在土壤侵蚀类之内,按侵蚀程度分为微蚀、轻蚀、中蚀和强度侵蚀。 二、四川省土壤侵蚀类型概述、 四川东部盆地区耕地土壤有紫色土、水稻土、潮土、黄壤、红壤等,以紫色土占的面积最大。紫色土由侏罗系、白垩系紫色砂岩、泥岩风化发育而成。紫色岩石松软、节理发育、机...

四川省面积为57万平方多公里,丘陵、山地和高原占总面积的97.7%,坡耕地(10°以上)占全省耕地70%左右。由于森林破坏,陡坡开垦,年降雨量1000毫米左右,多阵雨造成严重水土流失,使土层变薄,肥力降低,在全国被列为强度侵蚀区。 一、四川省土壤侵蚀类划分原则、 (一)划分原则、 1.发生学原则:考虑土壤侵蚀营力(水、风、重力、温度等)形成不同的土壤侵蚀类型。 2.生产性原则:土壤侵蚀程度影响土地利用和改良方向。 (二)划分依据及分级单元、 根据以上原则将我省土壤侵蚀类型分成三级、 第一级、土壤侵蚀型:按土壤侵蚀发生成因及性质分为水蚀、重力侵蚀、风蚀、冻融侵蚀等。 第二级土壤侵蚀类:在土壤侵蚀型之下,按土壤侵蚀后地表形态及土壤存留面积划分、水蚀包括面蚀、滑坡、沟蚀,隐匿侵蚀、溶蚀:重力侵蚀包括崩塌、震蚀、泥石流;风蚀;冻融侵蚀包括冰蚀。 第三级土壤侵蚀亚类:在土壤侵蚀类之内,按侵蚀程度分为微蚀、轻蚀、中蚀和强度侵蚀。 二、四川省土壤侵蚀类型概述、 四川东部盆地区耕地土壤有紫色土、水稻土、潮土、黄壤、红壤等,以紫色土占的面积最大。紫色土由侏罗系、白垩系紫色砂岩、泥岩风化发育而成。紫色岩石松软、节理发育、机械风化快,以面蚀为主,沟蚀次之。水田由于水分下渗造成隐匿侵蚀。川西

The favorable conditions for developing gravity flows at Baimiao district in Dongpu Depression are as follows. (1)Arid-subarid palaeoclimate was helpful for mechanical weathering of source rocks and torrent forming; (2) The combination of source rocks and their occurrence were liable to cause mechanical breakdown of rocks and form mudflow, (3)There was a considerable height difference along the border of the basin, (4) The density of subaqueous mudflow was 2.4-2.7g/cm3; (5)There was a high rate of accumulation...

The favorable conditions for developing gravity flows at Baimiao district in Dongpu Depression are as follows. (1)Arid-subarid palaeoclimate was helpful for mechanical weathering of source rocks and torrent forming; (2) The combination of source rocks and their occurrence were liable to cause mechanical breakdown of rocks and form mudflow, (3)There was a considerable height difference along the border of the basin, (4) The density of subaqueous mudflow was 2.4-2.7g/cm3; (5)There was a high rate of accumulation in the district; (6)The depositional enviroment was located below the semi-deep lake. The sublacustrine fan in the area,compared with R.G.Walker's (1978) subaqueous fan sequencers of developed and incomplete fan-prograded sequence and independently occurred main channels. Tectonic activity controled both the depth and area of lake water and the vicissitude of sublacustrine fans with time andspace. The fan vicissitude showed one cycle, i.e.progressive--regressive--progressive with the tectonic movement from strong to weak in the member, The distribution of fans evidently controlled sandbody occurrence.

本文论述了东濮凹陷白庙地区沙三段重力流沉积成形的条件、层序特征、水下扇的时空变迁和砂体展布。认为本区沙三段时期满足重力流的形成条件,主要表现在六个方面:(1)干旱-半干旱的气候环境有利于母岩的机械风化和山洪的形成;(2)母岩的组合及其产状容易发生机械破碎,形成泥石流;(3)盆地边缘地形高差悬殊;(4)高密度的水下泥石流;(5)堆积速率大;(6)水深位于半深湖以下。重力流沉积(湖底扇)的垂向层序特点是:扇推进式层序发育,但都不完整,而主水道单独出现。构造运动控制着湖水的深浅和范围,也控制着水下扇的时空变迁;伴随着沙三段构造活动的弱→强→弱变化,水下扇的变迁也显示出一个周期,即推进→后退→推进。而扇的分布又明显地控制了砂体的展布,决定着湖底扇砂体呈扇形(平面)或楔形和透镜状(剖面)。

According to our investigation in Alagou Basin of Tianshan Mountains, the debrisflow of this area possessed mainly a series of charaters, such as:wide scope of harm, numer-ous outburst. lower frequency, high energy, different scale. There are more than 140 debris flow gullies at least in this area. They distributed bothsides along Alagou river basin, types of debris flow consisted-mainly of gully debris flow,and slope debris flow,dominant factors of the outbrust of debris flow included several as-pects mainly:...

According to our investigation in Alagou Basin of Tianshan Mountains, the debrisflow of this area possessed mainly a series of charaters, such as:wide scope of harm, numer-ous outburst. lower frequency, high energy, different scale. There are more than 140 debris flow gullies at least in this area. They distributed bothsides along Alagou river basin, types of debris flow consisted-mainly of gully debris flow,and slope debris flow,dominant factors of the outbrust of debris flow included several as-pects mainly: 1.Steep topography and broken mountain suplly favourable place for the outburstof debris flow. 2. Abundant solid materials suplly the material condition for the outburst of debrisflow. 3. The condition of moisture is the dominant condition of the debris flow outburst.

据野外考察分析表明,本区以中小型泥石流为主,具有危害范围广、群发性强、低频率的特点.泥石流形成区地形陡峭.山体破碎.是泥石流活动的有利场所,岩石破碎、机械风化强烈为泥石流提供了物质条件.而阵发性大降水是泥石流形成的诱发因子。

 
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