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残积层

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The eastern Laizhou Bay is an important potential area of littoral placer gold deposits of China, in Which both eluvial-deluvial and alluvial placer gold deposits are found. And placer gold anomaly is discovered in the littoral sand barrier, beach, subaqueous bar, subaqueous estuarine delta, seawater shallower than 14m, ancient lagoon, ancient alluvial layers and ancient coastline.

莱州湾东部是我国滨海砂金矿重要的成矿远景区,区内已探明有残坡积型和冲积型砂金矿床,并在滨海沙堤、沙滩、水下沙坝、水下三角洲、水深小于14m的浅海海域及古岸线、古泻湖、古冲积层中发现砂金异常,特别是海区的发现,为我国浅海砂金的调查开阔了新的前景。

"Eluvium:Residual deposits of soil, dust, and rock particles produced by the action of the wind."

残积层:由于风力所产生的土壤、灰尘和岩石细粒的堆积物。

Stratum near the bridge foundation is rhyolite porphyry in late Jurassic period. A little of slope eluvium exists on the top of the mountain, which is 200 m long and 80 m wide, and its all sides face to sea. The integrality of rock mass of the mountain is relatively poor because of the effect of some faults and other structural fissures.

桥基所在地层为晚侏罗系流纹斑岩,山体顶部有少量坡残积层,地形上该山体平均长200m、宽80m,四面临空,且受数条小断层及共他构造裂隙的影响,山体岩体完整性较差。

Combined with advanced geological forecast work of Changwuling tunnel the reflection characteristics of radar wave pass through integrated stratum with rock of single characteristics,rich water region,rock vein and fracture zone,interface between slope eluvium and bedrock are analyzed.

结合长坞岭隧道超前地质预报工程实例,分析了雷达波穿越单一岩性完整岩层、富水区围岩、岩脉及裂隙破碎带、坡残积层与基岩界面时的反射特征,指出地质雷达在长坞岭隧道超前地质预报优化设计施工方案中发挥了重要作用,可为保障施工安全提供有效指导。

The tantalite mineralisation at Portee appears to be associated with quartz core zones, zones of K-metasomatism and with eluvial

钽铁矿的矿物性质是由石英核心带、K长石同化矿带和残积层部分组合而成的。

But in many reinforcement projects, some unfavourable geological are encountered frequently, such as colluvial soil, residual soil, slope wash, etc., which result in collapse of borehole and clip of bore rod during drilling of borehole that will bring considerable difficulties to construction and many incipient faults for construction quality.

但是,锚固工程常遇到各类不良地层(例如塌积、残积、坡积和崩积层等碎石土地层),在锚固施工的钻孔中由于严重的塌孔、卡钻,给施工带来很大困难,同时也给锚固工程质量带来隐患。

The results show that these gravel silty clays distributed at the range between the rock slope with an altitude lower than 190m and the rock platform with an altitude about 140-150m are formed from sliding; and that those gravel silty clays distributed above 190m of the rock surface are residual, colluvial and talus deposits; and that the gravel sand layer located along Zhuxi River is a kind of alluvial deposit.

研究结果表明:分布在基岩面高程190m以下的斜坡与基岩面高程140~150m平台上的粉质黏土夹碎石土层是由滑坡作用形成的;分布在基岩面高程190m以上的粉质黏土夹碎石土层是由崩积、残积及坡积作用形成的;卵石砂土层是苎溪河的冲积作用形成的。

In Qiongshangou area, the outcropping strata in gully consists of thick quartz rock and the thin-to-thick marble contained two-greisen schist, of Maoxian Group in Silurian System, and bedrock consists of metamorphic granite, diorite gneissose and a few of metamorphic marble, and its surface layer contains a 30~60cm thick residual slope deposits formed by weathering.

邛山沟流域内出露地层为志留系茂县群厚层石英岩、二云英片岩夹薄至厚层大理岩,基岩表面风化形成30~60cm 厚的残坡积物。

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.

对最近在藏北羌塘盆地菊花山、肖茶卡、石水河等地区新发现的肖茶卡组顶部的粘土质角砾岩的地质、地球化学特征研究表明:其岩石矿物成分、结构构造、角砾层产状及剖面演化序列等与古风化壳的形成及其特征较为一致;相对于基岩,古风化壳的主量元素表现为CaO、CO2的淋失和SiO2、Al2O3、Fe2O3、K2O、Na2O、MnO、P2O5等不同程度的相对富集;古风化壳中的粘土质风化残积层的稀土元素具有明显的富集,表现为LREE含量远大于HREE的特征,存在明显的Ce的正异常以及Eu的负异常;微量元素除Mo、Sn和U外,粘土质风化残积层的其余元素含量均有明显的增加。

Institute of Geodes Red earth is widely distributed in South China , which is important accumulation since Late Cenozoic and results from special climate and geographic environment .

红土是在特定的自然地理和地质环境下的产物,形式主要为第四纪各种动力成因的堆积物及出露地表的各种基岩残积层

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