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前寒

前寒

前寒

1

Chemical fossils (e. g. alkanes and porphyrins ) are often the only evidence for life in rocks of PRECAMBRIAN age.

化学化石（烷烃和卟啉）是前寒武纪地层中生命存在的唯一证据。

2

The Precambrian metamorphic rocks in Northern Fujian are the important part consisting of the Cathaysian palaeocontinental basement .

闻北前寒武纪变质岩是华夏古陆基底的重要组成部分。

3

The first three eons, which together lasted nearly 4 billion years, are together known as the Precambrian.

前三个时期合起来持续了 40亿年，合称为前寒武纪（隐生宙）。

4

The Bogda Mountain , with Junggar basin on the north and Turpan -Hami basin on the south, is a part of the East Tianshan Mountains.

博格达造山带位于准噶尔和吐鲁番 -哈密两个前寒武纪地块之间，是晚古生代的大陆裂谷。

7

That history began with the origin of the primitive , unicellular aquatic algae of the Precambrian Eon.

最初，前寒武纪出现原始的单细胞水生藻类，除了蓝绿藻和细菌之外。

9

Precambrian BIF iron ore deposit can be divided into two types, Algoma-type and Lake Superior-type .

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。

11

Among them the Precambrian and Cenozoic eras are the main metallogenic epochs in the world .

就全球而言，前寒武纪和新生代是金矿的重要成矿期。

12

This is illustrated by the fact that on Earth most of the Precambrian record is preserved in such lithologies.

在地球上，前寒武纪的许多记录就保存在类似的岩石里。

13

They are important structural features in the Precambrian metamorphic rocks .

它是前寒武纪变质岩内一种重要的构造现象。

14

However , it is difficult to clarify the actual growing mechanism of the stromatolite .

但目前还难以回答叠层石的确切生长机制，特别是前寒武纪叠层石；

15

This paper has made a detailed analysis of the temporal and spatial distribution of Precambrian mineral deposits in China .

摘要文章详细地分析研究了中国前寒武纪矿床的时空分布。

16

Precambrian animals must therefore have lived at such depths .

因此，前寒武纪的动物肯定曾经生活在这么深的地方。

17

Selected Papers on Precambrian iron Deposits.

前寒武纪铁矿论文集。

18

The origin of lichens dated back to the Precambrian .

资料表明：地衣的起源可追溯到前寒武纪；

20

The Precambrian crystalline rock series in the Yadong area is previously called "the Nyalam Group " .

藏南亚东地区前寒武纪结晶岩系以往统称为 “聂拉木群 ”。

21

They are controlled by shear fracture belt of epimetamorphic rock series of Precambrian Period.

主要赋存于前寒武纪浅变质岩系中，受剪切断裂带控制。

22

After the Precambrian , there are three eras setting apart on their fossil records of dominant life .

前寒武纪之后，根据主要生物化石纪录划分出 3 个代。

23

Fossil Records and Molecular Clock Study of the Time of Origin of the Precambrian Biologic Lineages

前寒武纪生物起源时间的化石和分子钟研究

27

Geochronological Study on Formation and Metamorphism of Precambrian Basement and Their Mineralization in Yunnan, China

云南前寒武纪基底形成与变质时代及其成矿作用年代学研究

28

Geochemical characteristics and depositional environments of the Late Precambrian bedded siliceous rocks in western Hunan

湘西晚前寒武纪层状硅质岩的热水沉积地球化学标志及其环境意义

29

International Conference of Mineralization in Precambrian Terranes

前寒武纪地体中成矿作用国际研讨会

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