元古代

Tarim massif, and its like Yangzi massif, cratonized in Neo-proterozoic, was affinitive to Gondwanaland, possibly a slice of Gondwanaland deduced from the research of breakup of Rodinia.

在晚元古代中期完成克拉通化的塔里木地块，与当时的扬子地块一样，和岗瓦纳古陆具有较强的亲缘性。从Rodinia古陆的拼合研究中推断它们可能同为岗瓦纳古陆的一部分。

Its basement is composed of Mesoproterozoic greenstone and associated complex, with the tectonic characteristics of earlier crustal evolution.

研究表明，其基底由前中元古代绿岩及与之伴生的花岗质杂岩组成，它们具有地壳早期演化的地质构造特徵。

OGa. The 1863士44Ma U-Pb age of migmatite and 2071士48 Sm-Nd iso- chron age of amphibolite in Sanzhishu demonstrate that at least part of the "Hexi" Group is of Early Proterozoic rather than Late Paleozoic.

三枝树地区"鹤溪群"中混合岩年龄为1863±44Ma，斜长角闪岩全岩矿物Sm－Nd等时线年龄为2071±48Ma，表明景宁三枝树地区变质岩的时代应为早元古代，并非原来所属"鹤溪群"划归的晚古生代，这套变质岩可能是浙闽变质基底的一部分。

Nalati tectonic belt located between the Ili Basin and the South Tianshan of western Tianshan is 25 km wide, and it is composed of earlier Proterozoic schist, gneiss, migmatite, and migmatitic granite.

那拉提构造带位于天山西段伊犁盆地与南天山之间，出露宽度约 2 5 km，由早元古代片岩、片麻岩及混合岩、混合花岗岩组成；深层次韧性剪切带及叠加中-浅层次剪切带发育；那拉提构造带南缘断裂明显，南侧为古生代浅变质黑色岩系；构造带北缘韧/脆性剪切带宽度大，两侧岩石劈理化后易于混淆，故界线不明显。

Research on the main rock-forming minerals of Middle Proterozoic Subera Yingfeng rapakivi granite in the North Qaidam Basin tectonic belt indicates the magmatic body exhibits pyterlitic rapakivi texture,and each main mineral is polygenetic.K-feldspar mainly takes the form of oval phenocryst,and exsolved albite stripe is well-developed.

柴北缘构造带中元古代鹰峰环斑花岗岩主要造岩矿物的研究结果表明，该岩体具pyterlitic型环斑结构，各主要矿物均具多世代特征。

Early Proterozoic magmatic activity is one important part of Precambrin crustal evolution of the studied area.

早元古代岩浆活动是研究区地壳演化的重要组成部分。

As only one kind of fossil in Proterozoic,stromatolite is an important material in the paleo-geography changing study.

元古代叠层石是研究古地理变化的重要材料。

Early stage mineralization is related to the formation and evolution of early Proterozoic NW-trending ductile shear zone.

本区经历了主要的两期金矿成矿事件，早期金矿化与早元古代NW向韧性剪切带形成及演化有关。

These source rocks developed with strata from Middle Proterozoic to Cenozoic,among which the Mesozoic and Cenozoic layers are the most important.

在地质时代上，从中元古代到新生代均有烃源岩分布，最重要的是在中、新生代。

The above new data give the information of the possible existence of Proterozoic basement in this district, and Yanshanian magmatism is of great significance for mineralization in the district.

以上这些新资料说明该区可能存在元古代基底的信息，且燕山期岩浆活动对本区成矿具有重要意义。

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。