元古代

Based on the study of rock textures and structures, and stable isotopes of dolomite and S isotope of barite interlayers within the cap dolomite outcropped in the Miaohe area in the Three Gorge, it is testified that the stable isotopes show a strong negative excursion, and the isotopes of sulfur show a significant positive excursion, which is similar to the reported data of authigenic barites formed in a modern seafloor gas hydrate environment. Therefore, it can be concluded that the cap dolomite was most likely formed in a special environment under which a huge gas hydrate dissociated with the breakup of "Snow Earth" in later Neoproterozoic.

通过对湖北三峡庙河地区出露的&盖帽&白云岩的野外地质构造、碳－氧稳定同位素和重晶石夹层的硫稳定同位素特征的研究，发现除了明显的碳稳定同位素的负偏移之外，重晶石的硫同位素值表现出明显的正偏移，其数值可与现代海底甲烷喷气孔附近的自生重晶石矿物的同位素组成相对比，进而认为&盖帽&白云岩的成因是末元古代&雪球&事件之后天然气水合物的释放与全球环境突变背景下的沉积产物。

The ductile extension shearing between rock layers is the main structure action, which causes the plastic fludization and mylonization of rocks during the later period of late proterozoic era, and the brittle-ductile extension shearing is the main cause to form the breccias and quartz veins during Yenshan movement.

首次提出了金山韧性剪切带伸展—逆冲—伸展剪切的多阶段发展演化模式。晚元古代晚期的顺层韧性伸展剪切是形成金山地区岩石塑性流变和强烈糜棱岩化的主要构造作用，燕山运动期迭加的脆—韧性伸展剪切是形成该地区碎裂岩和石英脉的主要构造作用

This suggests that subduction of a paleo-ocean basin occurred between the Paleoproterozoic North China craton and Qaidam craton.

因此推测斜长角闪岩的原岩为不同程度部分熔融的岩浆弧作用的产物，说明在古元古代华北克拉通和柴达木克拉通之间存在古洋盆的俯冲消减。

It is suggested that North China and Yangtze Cratons had ever been a unified craton, called Palaeosinica Craton, within which NNE-trending structural framwork was dominant, untill to the end of Palaeoproterozoic.

提出了 古元古代华北克拉通与扬子克拉通可能为一个统一的克拉通，暂称之为古中国克拉通，并且这一克拉通内的主导性构造线方位是NNE向。

Magnetic sus- ceptibility of these formations was obviously lower than the Archean high-graded metamorphic crystalline basements, while the responding ductile shear zones created enhanced anisotropy magnetic susceptibility attributed to their penetrative mineral lineations, both of them contributed to the crustal scale NEE-NNE striking linear aeromagnetic anomalies.

不同规模的古元古代活动带彼此并不相连，以发育变质沉积-火山岩建造为主体，岩石磁化率明显低于太古宙高级变质结晶基底，与之相关的韧性剪切带则以其透入性矿物线理产生了增强的磁化率各向异性，两者共同构建了地壳尺度北东东-北北东向线性航磁异常带。

The core issue is how to construct a reasonable physical, chemical and microbial condition for early rapid precipitation and filling of molar tooth cracks in the subtidal shallow marine.

在综述臼齿碳酸盐岩成因研究历程和国内外最新研究成果的基础上，总结评述了6种主要的臼齿构造成因模式，其核心问题是在元古代正常潮下浅海环境中构建成岩作用早期臼齿构造裂缝形成及等粒微亮晶方解石快速沉淀充填的物理、化学及微生物条件。

Numerous iron spherules have been found from coarse sandstone in the bottom of the Changzhougou Formation (1.8Ga) and silicified carbonate rock of the Dahongyu Formation (1.6Ga) of Proterozoic strata of the Ming Tombs District, Beijing.

北京十三陵中元古代常州沟组底部的粗砂岩(l.8Ga)和大红峪组硅化碳酸盐岩(1.6Ga)中都发现了众多铁质宇宙球粒。

"These fossilised nuts are the oldest proof we have for mammals laying in food stores," Martin Sander, a palaeontologist from Bonn university, said.

来自德国波恩大学的古元古代教授，玛丁赡德表示：这些坚果化石也是我们目前掌握的，最古老的会哺乳动物贮藏食物的化石。

We divide bedrock rock types in the middle and late Proterozonic Era as well as the Archaean Era into three types ,which are metamorphic rock ,deposition rock and the igneous dike.

将西部低潜山带中晚元古代和太古宙基岩岩石类型划分为变质岩、沉积岩和火成岩脉三大类。

The banded iron-bearing quartzite etc., evidentely show the metamorphic strata of whole Proterozoic and probably even of Archaeozoic.

结合隆起带内具条带状构造的含铁石英岩等资料，论证了中天山隆起带出露有整个元古代的变质岩层。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。