Under the action of which pyrogenic rocks, volcanic complex, aqueous rocks, sedimentary rocks etc.

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Under the action of which pyrogenic rocks, volcanic complex, aqueous rocks, sedimentary rocks etc.

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Under the action of which pyrogenic rocks, volcanic complex, aqueous rocks, sedimentary rocks etc., come into being

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Under the action of which pyrogenic rocks, volcanic complex, aqueous rocks, sedimentary rocks etc., come into being

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Under the action of which pyrogenic rocks, volcanic complex, aqueous rocks, sedimentary rocks etc.

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Geological and geochemical characteristics of the Early Ordovician volcanic rocks from North Qilian Mountain show that they are of the basalt-andesite association with no acid rocks or volcanic rocks of the shoshonite series.

早奧陶世陰溝群火山巖的地質－地球化學特征的研究結果表明，該期火山巖的巖石組合為玄武巖－安山巖組合国产普通话在线视频噜噜噜，缺乏酸性火山巖和橄欖玄粗巖系列火山巖日韩免费黄色网站。

Studies of petrology and petrochemistry indicate that such suit of volcanic rocks dominated by lattite belongs to shoshonite series to potassic alkali basalt series. Considering the stability of rocks and their associations, gentle stratum occurrence, fresh degree of rocks and comparatively clarity of horizons. this potassic volcanic stratum distributed over the Sailipu area is named as Sailipu Formation, and the age of which is early middle Pleistocene of Quaternary.

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The second intrusive rocks (the representative rocks: Tiantangzhai and Jiuzihe granites) are high-k calc-alkaline and a few are shoshonite rock series, Tiantangzhai and Jiuzihe intrusive rocks show respectively metaluminous and transitional charaterastics between metaluminous and peraluminous.

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The distinctive features of volcanic rocks, especially the spilite, illustrates that mantle plume or hotspot with small scale might be the essential origin of a series geologic events such as the extension of crust, the interval eruption of submarine bimodal volcanic rocks especially the increasing eruption of basic rocks, and the mineratlization of Ashele mine

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This paper presents a nonlinear analysis of the stresses in jointed rocks around a subterranean structure by the initial stress method. In this analysis, rocks with a parallel set of joints of a given predetermined orientation are idealized as a stratified. material with no shear between the strata j and rocks with a random set of joints are idealized as a tensionless material.

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