太古代

Anatexis resulted in the formation of leucosomes of various shapes and sizes in leucoleptites of Neoarchaean Fuping Group.

新太古代阜平岩群浅粒岩遭受深熔作用改造形成一些不同规模和形状的浅色体。

Temperatures during the Archean were at least as high as they are today, despite the weaker sun, he says.

他说，尽管当时的阳光较弱，太古代期间的温度至少跟现在一样高。

Various geochronometric methods have been applied to dating of important geologic events in complex Archean terranes.

在复杂的太古代地体的重要地质事件定年中已采用了多种地质年龄测定方法。

The fault zone perhaps originated at later Archean and controlled the formation of the two greenstone belts.

本断裂带可能在晚太古代形成雏形，并控制了两期绿岩带的形成。

Dial back the clock nearly 4 billion years, to a time called the Archean, and the sun would appear about 30% dimmer than it is now.

把时钟拨回到将近四十亿年前，回到一个叫做"太古代"的时期，当时的太阳光线看起来比现在要弱大约30%。

Komatiite, as an indication of an Archean greenstone belt, has long attracted attention of geologists.

科马提岩作为太古代绿岩带的一个标志，一直受到广大地质工作者的重视。

Based on the ratio of the minerals, the team reports in tomorrow's issue of Nature that CO2 levels during the Archean could have been no higher than about 1000 parts per million—about three times the current level of 387 ppm and not high enough to compensate for the weak sun.

根据两种矿物的比例，研究小组在明天出版的《自然》杂志上报道说：在太古代期间，二氧化碳的水平决不会高于大约百万分之一千（1000ppm）——大约三倍于目前的水平（387ppm），不足以弥补阳光的弱势。

In the last few years,some new advances have been made in the study of the metallogenic setting and ore-forming physicochemical conditions for Archean lode gold deposits .

主要介绍了近几年来关于太古代脉状金矿的产出环境、成矿物理化学条件等方面研究取得的一些新进展，如会聚构造环境成矿和地壳连续成矿模式的提出等；初步讨论了我国在太古代高级变质区寻找高温脉状金矿时应注意的问题。

It is known from this paper that the evolutions of Palaeo Protrozoic and Archaean lithospheres in Fennoscandian shield are very different.The trans European suture zone results from the reworking of Precambrian crust and also from the Caledonian and Variscan terr...

通过研究，人们已认识到芬诺斯堪的亚地盾古元古代、太古代岩石圈演化特征有明显不同；横跨欧洲的缝合带既是前寒武纪地壳显生宙重新活动的结果，也是加里东和华力西地体增生作用的结果；乌拉尔造山带是古生代微大陆碎块进一步裂解、崩解、增生到东欧大陆边缘的结果；侏罗纪到现代的非洲—阿拉伯板块及其间的大陆地体与欧洲板块相互作用制约了喀尔巴阡和迪纳拉造山带演化，同时影响了东欧克拉通边缘应力场，也深深地波及到克拉通内部，形成裂谷作用。

The REE distribu- tion curves of Archaeozoic metamorphic rocks,Proterozoic granite,Tertiary basalt, Mesozoic granite,granite-porphyry,rhyolite,tuff,and gold ores are of right inclinnation, which indicates they enrich LREE and have completely similar Ce negative anomaly.

研究表明：太古代变质岩、元古代花岗岩、中生代花岗岩及花岗斑岩、流纹岩和凝灰岩、第三纪玄武岩及金矿石的稀土配分曲线均为右倾斜型，即富轻稀土，都有十分相似的 Ce 负异常。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。