This research has detail summed up the characteristics between aluminosilicate weathering and the weathering of carbonate rocks, and is pointed out the similar weathering processes for aluminosilicate and carbonate rocks at the second stage.

本研究工作系統(tǒng)地總結(jié)了碳酸鹽巖和硅酸巖風(fēng)化的特征異同大乱婬交欧美视频一区，并且指出碳酸鹽巖第二階段的風(fēng)化類似于硅酸巖的風(fēng)化免费,欧美一级视频。

The paper has studied the strata distributive character and engineering geologic property of bed rock zone of weathering in cryptical coal field, based on large of data form testing and real-field materials, taking importance on the laws of overlying destruction and underground pressure behavior and the mechanism of decreasing protective coal columns while extracting proximity zone of weathering .

以大量實(shí)驗(yàn)數(shù)據(jù)和現(xiàn)場測試資料為依據(jù)精品欧美伦欲视频，研究了隱伏煤田基巖風(fēng)化帶巖體的分布特點(diǎn)及工程地質(zhì)特性对白露脸视频一区二区在线，重點(diǎn)論述了鄰近風(fēng)化帶開采的覆巖破壞和礦山壓力顯現(xiàn)規(guī)律以及縮小防護(hù)煤柱的機(jī)理12345aa一级黄色网站，為類似礦井的資源回收與安全開采提供了依據(jù)cao免费在线视频官网。

Weathering performance of the fire-resistant and weathering construction steel WGJ510C2 was studied by using indoor cyclic corrosion test and atmospheric field exposure test.

對室內(nèi)鹽霧加速腐蝕循環(huán)試驗(yàn)和10個月大氣暴露試驗(yàn)的耐火耐候建筑用鋼試樣進(jìn)行電化學(xué)測試，研究了其耐蝕性能巴西性XX在线观看。

In Branch C area, the heavy REE enriched shale normalized patterns of DREE, resemble a characteristic of REE in the weathering profiles, meanwhile, the fractionation of REE during the weathering process and the complexation of the REE with organic matters, also contribute to the patterns.

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Stone weathering is one of the important contents of geomorphology, but the study of its mechanism can be also applied to the weathering of building materials and their resistance to the environmental damage.

巖石風(fēng)化是地貌學(xué)研究的重要內(nèi)容，但對其機(jī)制的研究也可應(yīng)用于建筑物風(fēng)化及其抗蝕性的領(lǐng)域99网一级A片在线免费播放。

The chemical weathering index, K/Na ratio, eluvial coefficientand A-CN-K diagram , can availably indicate the evolution of pedogenic environment. The A-CN-K and CIA-K/Na diagram showed that the Holocene paleosol was in the primary stage of weathering, which K-feldspar went through weak weathering and K was less leached with much leach of Ca and Na. The intensity of weathering went stronger gradually from west to east in the Weihe Valley.

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The analysis of weathering crust characteristic of lower Permian Kalagang group in Malang sag, Santanghu basin suggests that the paleo-weathered crust includes weathering clay ground, strong weathering rubble layer, weak, weathering block-stone layer and unweathered rock layer in vertical and was distributed under the unconformity interface and presented in planar manner horizontally.

對三塘湖盆地馬朗凹陷下二疊統(tǒng)卡拉崗組風(fēng)化殼特征的分析国产真实精品录音区，認(rèn)為古風(fēng)化殼縱向上分為風(fēng)化粘土層、強(qiáng)風(fēng)化碎石層国产众筹模特无码对白、弱風(fēng)化塊石層以及未風(fēng)化巖石層等欧美大黑吊性交，平面上呈面狀分布于不整合界面之下，剖析該區(qū)古風(fēng)化殼成藏地質(zhì)條件和構(gòu)造演化禁18在线免费观看网站软件，探討了可能發(fā)育油氣藏類型及與風(fēng)化殼的關(guān)系人人操人人爱人人摸人人看，并指出了該區(qū)下一步下二疊統(tǒng)卡拉崗組有利的勘探目標(biāo)是在P2t剝蝕線與P1k剝蝕線之間范圍內(nèi)，其次為卡拉崗組剝蝕線以東地區(qū)中文字幕三级片。

Based on test conditions of these two acceleration weathering methods in NES M1041,possibility is discussed on Xenon Arc Lamp Acceleration Weathering Test Substituting Sunshine Carbon Arc Lamp Acceleration Weathering Test in vehicle'acceleration weathering tests.

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Recent developments in the research on the geology and geochemistry of the newly-discovered clayey breccias at the lop of the Xiaochaka Formation in the Juhuashan, Xiaochaka and Shishuihe areas, Qiangtang Basin, northern Tibet have disclosed that mineral compositions, textures and structures, occurrences and sectional architectures of the clayey breccias agree well with those of the paleo-weathering crust in these areas. Compared with the bedrocks, the paleo-weathering crust is characterized by the leaching out of CaO and CO2, and relative enrichment of SiO2, Al2 O3, Fe2O3, K2O, Na2O, MnO and P2O5. The clayey weathered residues in the paleo-weathering crust are characterized by marked enrichment of REEs, much higher contents of LREEs than those of HREEs, markedly positive Ce anomalies and negative Eu anomalies, and a noticeable increase in other element contents besides Mo, Sn and U from the clayey weathered residues.

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According to the analyses of the main periglacial processes and their landform types as well as the correlation with the rock cryo-genic weathering, it is concluded that the continental periglacial process which developed in the most areas on the Qinghai-Xizang Plateau, is dominated by the freeze-thaw, salt and insolation weathering which may exert same influence in the cryo-genic weathering assemblage.

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