元古代的

The continental mantle geochemical characteristics and crust-mantle evolution in the west of Yangtze Plate was discussed through the study of some within-plate basic ultrabasic rocks from Lower Proterozoic to Later Paleozoic in this paper.

本文通过对扬子板块西部从早元古代至晚古生代不同时期的多个板内基性超基性岩的地质地球化学研究，探讨了扬子板块西部大陆地幔的地球化学特征及壳幔演化机制。

The Middle Proterozoic Caiziyuan peridotite was formed in the epicontinental basin at the ocean-land boundary or within-continent rift basin. Its mantle source could be metasomatized by the dehydration fluid of subducted plate, and much initial radioactive 〓Nd was added to the source.

中元古代菜子园橄榄岩形成于洋陆交界的陆缘盆地或与大洋相连的陆内裂陷盆地，其源区可能受到俯冲板块脱水流体的交代作用，有大量初始放射性〓Nd加入。

We divide the evolution of becoming rocks into four periods: early region's metamorphic process and mixed lithifaction,sedimentation and becoming rocks process in middle and late Proterozonic Era and in the Paleozonic Era,trasformation process of burial hill layers in earth shell'uplift period in the Mesozonic Era, and transformation process to burial hill in the Cenozonic Era.

将储层的成岩演化划分为四个阶段：即早期区域变质作用和混合岩化作用、中晚元古代和古生代沉积成岩作用、中生代地壳抬升阶段潜山地层的改造作用和新生代断裂对潜山的改造作用。

A number of microplants with spherical, triangular, polyangular and boat-like shapes have been found both from the early Palaeoproterozoic Dashiling and Qingshicun Formations (ca. 2500- 2400 Ma) of the Doucun Subgroup of the Hutuo Group and the late Palaeoproterozoic Changzhougou and Chuanlinggou Formations (ca. 1800 -1700 Ma) of the Changcheng Group in North China. According to the features of these fossils, such as size, external shape and internal structure, they may belong to unicellular eucaryotic planktons.

在华北地区古元古代滹沱群豆村亚群的大石岭组、青石村组(约2500～2400 Ma)和长城群的常州沟组、串岭沟组(1800～1700 Ma)中存在着大直径的球形和形态呈三角形、多角形及船形微古植物，根据它们的大小、外部形态和内部结构等综合判别，它们可能属于单细胞真核浮游生物。

ABSTRACT: Shallowing-upward carbonate cycles in the~2650 Ma Cheshire Formation, Belingwe greenstone belt, closely re- semble their Proterozoic and Phanerozoic counterparts.

问题补充：在津巴布韦贝林圭绿石带的26.5亿年的Cheshire组中向上变浅的碳酸盐旋回极相似于元古代和显生代的碳酸盐旋回。

This class of deposits is characterized by the abundance of iron oxide in the ores and the associated intensive regional sodic alteration. They may occur in Proterozoic intracraton or Phanerozoic continental margin volcanic arcs with nearby intrusive complex or evaporite. The spatially and temporally associated intrusive rocks are magnetite-series granitoids. Mineralization mainly occurs in second order echelon structures near the main regional structure.

该类矿床以矿石中含有大量的铁氧化物且伴有很强的区域性钠质蚀变为特征，可以产于元古代克拉通内或新生代大陆边缘岛弧环境，其周围具火成岩或含蒸发盐层，时空上与之有关的侵入岩为磁铁矿系列花岗岩，矿化主要产于近区域主断裂的羽状次级断裂中。

The modern structural pattern ofthe area consists of three synclines and three anticlines, a group of strike faults and a group of transcurrent faults, as well as some downfaulted basins; 8. The blue schist belt, which distributs at the northern part of the area, has a genetic relationship with the decollement plane between Yaolinghe Group and Doushantuo Formation.

晚元古代扬子板块北缘由被动大陆边缘转化为主动陆缘；7、本区的现存构造格局，由近东西向的三个复式向斜加三个复式背斜，一组走向断裂加一组横向断裂以及若干断陷盆地构成；8、本区北部的蓝闪石类矿物成带分布与耀岭河群与陡山沱组之间的层间滑脱面有关；一百五十多个白云母b。

The results indicate that indigenous organic matters (soluble lipids and insoluble kerogens) preserved in the rocks could still bear abundant significant information on the evolutions of both life and early environment although they may have been highly maturated.

研究表明尽管可能元古代沉积物具有相对较高的成熟度，但是保存于其中的原生有机质仍旧能够提供丰富的有关早期生命和环境演化的信息。

Liaohe group, outcropped in Eastern Liaoning Province, is a unique series of Paleoproterozoic metamorphic rocks, abundant in mineral resources.

辽河群是出露于辽宁省东部的独具特色的古元古代变质岩系，赋存丰富的矿产资源，研究历史悠久。

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。

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。