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盆地的基底是前寒武系变质岩。Precambrian metamorphic rocks constituted the basin basement.

水成岩指出了前寒武层的花粉传授。Sedimentary rocks show pollen in very deep, "Precambrian" strata.

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前寒武纪地质学是地球科学的主要研究领域之一。Precambrian geology is one of the major research fields of earth sciences.

从前寒武世纪以来地球地面大部分被冰川所覆盖的任何地质年代。Precambrian time accounts for as much as eighty-five percent of all geological time.

藏南亚东地区前寒武纪结晶岩系以往统称为“聂拉木群”。This paper reports Precambrian rock magnetic fabrics in the Nyalam area of the southern Tibet.

华北克拉通中部广泛发育晚前寒武纪镁铁质岩墙群。Late Precambrian mafic dyke swarms are extensively developed in the central North China Craton.

前寒武纪条带状含铁建造铁矿床分为阿尔戈马型和苏必利尔湖型两大类。Precambrian BIF iron ore deposit can be divided into two types, Algoma-type and Lake Superior-type.

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藏南亚东地区前寒武纪结晶岩系以往统称为“聂拉木群”。The Precambrian crystalline rock series in the Yadong area is previously called "the Nyalam Group".

阿拉善—敦煌陆块是前寒武就已经形成陆壳的刚性块体。Alashan-Dunhuang land block is a rigid one that has been formed the continental crust at Precambrian.

麻山群和黑龙江群是佳木斯地块前寒武纪基底的重要组成。The Mashan group and Heilongjiang group are major components of the base of Precambrian Jiamusi block.

在地球上，前寒武纪的许多记录就保存在类似的岩石里。This is illustrated by the fact that on Earth most of the Precambrian record is preserved in such lithologies.

在黑峡谷国家公园，甘尼逊河深度侵蚀了峡谷岩壁，前寒武纪岩石便显现出来。At Black Canyon, the Gunnison has eroded the canyon walls so greatly that Precambrian rocks have become visible.

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研究结果还表明磁化率能够作为前寒武纪的古气候替代性指标。This research also reveals that susceptibility can be used as a palaeoclimate proxy for Precambrian successions.

构造地层学方法是变质岩，尤其是前寒武纪变质岩地区地层研究的有效方法。Structure-stratigraphic method is an effective method for stratigraphic study in Precambrian metamorphic rock area.

它产于前东武纪绿岩地体中安家营子石英二长岩体内外接触带附近的剪切带中。It occurs in a shear zone near the contact between the Anjiavingzi Quartz monzonite they and Precambrian greenstone.

因此，认为“聂拉木群”代表喜马拉雅地区全部“前寒武系”是值得商榷的。The argument that the Nyalam Group represents the whole Precambrian strata in the Himalaya area is worth discussing.

所知的最古的前寒武纪时代岩石，其组成成分主要为火成岩的，或与之相关的。Of or relating to the oldest known rocks, those of the Precambrian era, that are predominantly igneous in composition.

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锶同位素初始比值测试结果表明大梁子铅锌矿床成矿物质来源可能主要源自围岩碳酸盐岩或基底地层。Initial Sr isotope ratios show that the ore materials of the deposit were derived from the host rocks or Precambrian basement.

初始地壳，尤其是前寒武纪的变质基底是金矿密集区形成的物质基础。It is thought that the original crust , especially the metamorphose basement of Precambrian is the base of gold-ore formation.

闻北前寒武纪变质岩是华夏古陆基底的重要组成部分。The Precambrian metamorphic rocks in Northern Fujian are the important part consisting of the Cathaysian palaeocontinental basement.