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- Archean protaxis 太古陆块
- Their source is the Archean Group. 它们皆为S型,其源岩为太古界。
- Archean cratonization probablydepends on intra-mantle geological action. 3馒内地质作用与克拉通化存在成因上的联系。
- The nickel mineralization is contained in a layered basic massif surrounded and underlain by an Archean gneiss complex. 此处镍矿化产于一层状基性岩块内,其四周和下面都为太古代片麻岩杂岩围绕。
- Such low levels of sulfate indicate that the Archean atmosphere was virtually devoid of oxygen. 如此低的硫酸盐浓度,表示太古代大气中的氧气极为稀薄。
- It is worthwhile to pay more attention to study the issue whether there is a Archean terrain in the Cathysia Block. 华夏地块是否存在太古代地质体,应引起高度重视,值得进行进一步研究和确定。
- Felsic gneiss is the most widely distributed rock type in Archean metamorphic complex areas. 长英质片麻岩是太古宙变质杂岩区最主要的岩石类型。
- Archean is the most important geological period in which the iron ore resources formed occupies 79.87% of the total. 太古宙是区内最重要的地质时期;该时期形成铁矿资源储量占总资源储量79.;87%25;广泛分布在各古老结晶基底的变质岩系内。
- Late Archean and Early Proterozoic were the main period for the formation of continental crust. 晚太古宙和早元古宙是陆壳形成的主要时期,并已具现今板块活动特征。
- Jinchangyu gold deposit belongs to "tenacious shearing fractures of Archean anorthosite-diastatite". 金厂峪金矿床为“太古代斜长角闪岩中的韧性剪切带型金矿床”。
- Some problems and suggestions about the geological survey and study in Archean felsic gneiss terrains. 太古宙长英质片麻岩区地质调查研究中存在的一些问题和建议
- It is much more complex and difficult to study Archean stratigraphy than Phanerozoic stratigra-phy. 太古宙地层与显生宙地层相比,具有很大的复杂性,研究难度大。
- Tuling and Shihu gold deposit in Lingshou county,Hebei province occurred in metamorphic unit of Archean Fuping group. 河北省灵寿县土岭、石湖金矿赋存于太古代阜平群变质岩系中。
- Jiaodong Group ofthe Archean Erathem was the source bed of the gold deposits of the area. 上太古界胶东群是本区金矿床主要矿源层;岩浆活动是成矿物质的载体;
- As Archean not yet under construction and is still said, in the Pacific community. 由于太古宙之下尚未建代,现仍称下、中、上太古界。
- They have the typical geologic features of the golddeposits of Archean greenstone belt. 山西五台山太古宙绿岩带同构选初生型金矿床发现三种类型:条带状铁建造型。
- At this period, depositional formations have a distinct style from those in the Archean. 中文摘要 太古宙向元古宙的转变,宣告地球历史进入了一个新的重要阶段。
- From the fossil record, the late Archean large number of fungi and lower cyanobacteria. 从化石记录,太古宙晚期出现大量的菌类和低等的蓝藻。
- Isua's four-kilometer-wide belt of Archean rocks stretches35 kilometers along the western edge of the bluish-gray monolith of the Greenland ice cap. 这片矿藏可不好找,它是四公里宽的太古代岩层,沿著蓝灰色格陵兰冰帽硬块的西缘延伸35公里。
- The nickel mineralization is contained in a layered basic mass if surrounded and underlain by an Archean gneiss complex. 此处镍矿化产于一层状基性岩块内,其四周和下面都为太古代片麻岩杂岩围绕。