At a surface exposure the host rock dips steeply to the east.
在一个露头处，含矿主岩向东陡倾。
Different cryptoexplosion breccia is the host rock of the gold deposit.
隐爆角砾岩型金矿是国内外一种具有重要经济价值的矿床类型。
Two mica schists are considered to be the source bed and host rock of gold.
二云母片岩不仅是矿源层，而且还是赋矿围岩。
The relationships between VMS types, source of metal, host rock, volcanic rock types and tectonic setting have been studied in this paper.
研究了北祁连山造山带火山成因块状硫化物矿床（VMS）类型、金属来源与容矿围岩、火山岩类型及其构造环境的关系。
Wenquan granite is composed of two end-member rocks, one is the host rock of the acid end-member, and the other is the microgranular mafic enclave.
温泉花岗岩体由酸性端元的寄主岩石和暗色微细粒镁铁质包体群及基性岩墙群组成。
So it has more important significance that how to recognize silicified rock from host rock and the extent of silicify.
因此，如何正确地识别硅化岩石与原岩，以及硅化的强弱对于找矿有着重要意义。
Salt rock is regarded as the ideal host rock for nuclear waste disposal due to its advantageous geological conditions and physico-mechanical properties.
由于其有利的地质条件及优良的物理力学特性，盐岩被视为是核废料地质处置的理想场所。
The emplacement mechanism for granitoid, magmas is determined by rheological behaviour of the magma and the host rock as well as the tectonic, environment.
花岗质岩浆的上升、侵位机制除取决于岩浆与围岩的流变性质外，也受构造环境的制约。
The finite element method is used to calculate and analyze the stress and the displacement of host rock when the openings is under the jet grouting support.
采用有限单元法对巷道注浆支护时的围岩应力和位移进行了计算分析。
When driving and maintaining a drift in loose and fractured host rock, carrying capacity of host rock tends to be poor and underground pressure be intensifying.
在松散破碎围岩条件下进行巷道开掘及维护时，往往会出现围岩承载能力差、矿压显现剧烈等一系列问题。
The granite, which is transitional to its host rock granulite, possesses some special structure and texture, fluctuating largely in its chemical component concentration.
花岗质岩石与其围岩变（浅）粒岩为渐变过渡关系，并呈现一些特殊的结构构造。
There are many similarities of the REE distribution patterns and incompatible element patterns between the enclave and the host rock ( subvolcanic porphyric granodiorite ).
包体与寄主岩（次斑状花岗闪长岩）的稀土元素曲线和不相容元素蛛网图的形态非常相似。
Rock mechanics model has been established for different types of rock structure to offer a reliable basis for a comparative analysis of host rock stability while mining in a broad area.
建立了各种结构类型岩组的岩体力学模型。为大面积采矿的围岩稳定性模拟分析提供了可靠的依据。
Their petrological and geochemical characters suggest that the host rock of the xenoliths is basanite, and the magma has not experienced obvious differentiation and assimilatory contamination.
岩石学和地球化学特征揭示包体寄主岩为碧玄岩，岩浆没有经历明显分异和同化混杂作用。
Rock mechanics models have been established for different types of rock structure to offer a reliable mechanical basis for the analog analysis of host rock stability while mining in a broad area.
采用围岩分类专家系统中的不确定性推理处理方法，以工程地质学家谷德振提出的岩体结构划分标准为基础，对金川二矿区岩（矿）体用模糊数学中择近原则的方法进行模糊综合判别。
The host-rock of the ore deposit is phyllite and slate of Middle Devonian.
矿床主岩为中泥盆统干枚岩、板岩。
The studies of organic geochemistry on the ore-bearing formation show that the host-rock is rich in primary organic matters and the sedimentary environment is low basin in the epicontinental sea.
含矿建造的有机地球化学研究表明：主岩富含原生有机质，其沉积环境为还原一强还原的浅海低洼海盆。
Host-rock alteration is made up of retrograde and mineralized alteration.
围岩蚀变包括退化蚀变和矿化蚀变。
Host-rock alteration is made up of retrograde and mineralized alteration.
围岩蚀变包括退化蚀变和矿化蚀变。
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