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mechanical weathering
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  机械风化
     (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;
短句来源
  “mechanical weathering”译为未确定词的双语例句
     The pre-metasomatized CIA and PIA values of ~84 and ~85, respectively, in connection with the A-CN-K modeling and the variable Th/U ratios (2.9-25) commonly suggest that the source area was affected by a strongly chemical and mechanical weathering.
     高的前交代CIA(~84)和PIA(~85)指数、A-CN-K分布模式以及可变的Th/U(2.9~25)比值还说明源区已经历强烈的化学和机械风化作用。
短句来源
     Since the Cenozoic this mountain has risen and owing to structural jointing,combined with mechanical weathering and surface water erosion,it has gradually become a dolomitic marble"peak forest".
     新生代以来,山体上升,在构造节理的主导下,配合物理风化及部分地表流水作用,逐步发展成为白云石大理岩构造峰林。
短句来源
     The rise of seawater 87Sr/ 86Sr over the past 2.5 Ma may be caused mainly by the strengthening of the mechanical weathering intensity. And the rise of seawater 87Sr/ 86Sr over the past 2.5 Ma can be attributed to the common act of the continental riverine input and hydrothermal input, and both of them are equally important.
     海底玄武岩的热液蚀变输入对海水87Sr/86Sr变化的总影响量应近似等于河水输入对海水87Sr/86Sr变化的总影响量.
短句来源
  相似匹配句对
     Then the effect of weathering on mechanical strength of the granites is discussed.
     在此基础上,讨论了风化因素对花岗岩力学强度的影响。
短句来源
     Mechanical English
     机械英语 第四课
短句来源
     Mechanical English
     机械英语 第三课
短句来源
     Effect of Ti on the mechanical properties of high strength weathering steel
     Ti对高强耐候钢力学性能的影响
短句来源
     ON THUNDERSTORM WEATHERING
     论雷暴风化作用
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  mechanical weathering
Viscous relaxation of crater topography, burial by volcanic deposits, tectonic disruption, chemical and mechanical weathering and erosion, and accumulation of windblown sediments probably all contribute to resurfacing.
      
The clay mineral composition in the latter two basins may be closely related to volcanic activity and mechanical weathering products near and on Antarctica.
      
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 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.
      
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This paper discusses the features of the landform in the lower reach basin of the Sulehe River,and its changes.The author thinks that there are eight landform-terrains and symmetric structure in this area.Arid mechanical weathering,denudation,water erosion and accumulation,wind erosion and wind accumulation are the basin's prin- cipal features.The result of modern landscape has been developing since Pliocene.The climate of this area has been changing with aridity and moisture.The prosperous duration of...

This paper discusses the features of the landform in the lower reach basin of the Sulehe River,and its changes.The author thinks that there are eight landform-terrains and symmetric structure in this area.Arid mechanical weathering,denudation,water erosion and accumulation,wind erosion and wind accumulation are the basin's prin- cipal features.The result of modern landscape has been developing since Pliocene.The climate of this area has been changing with aridity and moisture.The prosperous duration of oasis is related to warm climate, and the decline to the cold.

本文根据野外考察,结合前人研究成果和卫片目视判读,对河西走廊西部疏勒河下游盆地地貌特征及其演变进行了探讨。认为处于不同大地构造单元之间凹陷地带的构造背景下,使本区具有较活动的内营力性质;差异性断块构造和斤降运动控制了本区的地貌格局。温带干旱荒漠条件决定了本区地貌外营力以干燥风化剥蚀、流水作用和风的作用为主。盆地地貌具有明显的南北差异、对称带状分布特点。盆地现代地貌主要是晚第三纪以来内外营力共同作用的结果。冰后期以来气候变化具有在总的干旱背景下干湿交替的特点。“丝路”的兴衰与气候的冷暖、干湿交替密切相关。

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...

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)。

The Larsemann hills are a series of gneiss islands and peninsulas extending into Prydz Bay, with an ice free area of approximately 200 km2 at 69°21′S 69°28′S and 76°00′E 76°25′E on the Ingrid Christensen Coast of Princess Elizabeth Land in East Antarctica. The area lies in the pole permafrost zone, aeolian action is very frequently and generally. The characteristics of modern landform are controled by periglacial processes. Because of the short history of ice free area and the relatively stable older Archean...

The Larsemann hills are a series of gneiss islands and peninsulas extending into Prydz Bay, with an ice free area of approximately 200 km2 at 69°21′S 69°28′S and 76°00′E 76°25′E on the Ingrid Christensen Coast of Princess Elizabeth Land in East Antarctica. The area lies in the pole permafrost zone, aeolian action is very frequently and generally. The characteristics of modern landform are controled by periglacial processes. Because of the short history of ice free area and the relatively stable older Archean Shield, the weathering process is very weak with mainly mechanical weathering, especially frost process. The major geomorphic types consist of aeolian landforms. periglacial landforms,glacial landforms, lake landforms, coast landforms and geological structure landforms, etc. The deposited landforms have not been developded successfully and fully. The landforms on the west hills are relatively young. The direction of glacial retreat is from NE to SW, according to the distribution of glacial relics, i. e. , moraines and rub traces. Islands. peninsulas and ice-land transition zone are three geomorphic regions.

拉斯曼丘陵地处极地永久冻土带,风力作用频繁。各种冰缘过程主宰了现代地貌特征的形成,无冰区历史短暂及南极东部古老结晶地盾的相对稳定性,使风化微弱,并以寒冻风化为主。风力地貌、冰缘地貌、冰川地貌、湖泊地貌、海岸地貌和构造地貌组成本区主要的地貌类型,各种堆积地貌形态均不发育。西部地区地貌形态相对年轻,残存的冰碛物地表分布特征指示冰盖后退依东北到西南方向进行,海岛、半岛及冰陆过渡带构成该丘陵三个差异明显的地貌单元。

 
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