| 1. | The nickel mineralization is contained in a layered basic mass if surrounded and underlain by an archean gneiss complex .
此处镍矿化产于一层状基性岩块内，其四周和下面都为太古代片麻岩杂岩围绕。 |
| 2. | Such low levels of sulfate indicate that the archean atmosphere was virtually devoid of oxygen
如此低的硫酸盐浓度，表示太古代大气中的氧气极为稀薄。 |
| 3. | On the age of metamorphic rocks of the yudongzi group and the archean crystalline basement of the qinling orogen
鱼洞子群变质岩年龄及秦岭造山带太古宙基底 |
| 4. | Isua ' s four - kilometer - wide belt of archean rocks stretches 35 kilometers along the western edge of the bluish - gray monolith of the greenland ice cap
这片矿藏可不好找，它是四公里宽的太古代岩层，沿著蓝灰色格陵兰冰帽硬块的西缘延伸35公里。 |
| 5. | Alternatively , the continental collision models postulated that the ncc consists of two archean blocks ( the eastern and the western ) , separated by ca . 1800 ma proterozoic erogenic belt
而大陆碰撞拼合模型认为华北陆块东部带和西部带于1870 - 1800ma沿中部带碰撞拼合， 1800 - 1750ma左右发生强烈的碰撞后伸展作用。 |
| 6. | The peak is composed of banded biotite tonalite of fine mediate grain developing in mengshan rock suit of fuping period of archean era about 2 . 7billion years ago . it ' s very steep
由27亿年左右形成的太古代阜平期蒙山岩套条带状中细粒黑云母英云闪长岩构成，柱状节理发育，差异性风化剥蚀作用强烈，组成云蒙“山”峰，俗称“挂心崛子” ，形容云蒙峰之陡峻。 |
| 7. | The paper analysis the geological feature of wuyang iron doposit , it study the archean geohistory of wuyang iron deposit , the paper research the developed process of zhao - an iron deposit and tie shan iron deposit , matemorphic effect , oxidation remake process of the iron deposit
摘要分析了舞阳铁矿地质概况，追溯了舞阳铁矿田太古代古地史和赵案庄式铁矿、铁山庙式铁矿的形成过程以及变质作用，氧化作用对矿床的改造作用过程。 |
| 8. | Through the ree charactheristics being studied , it suggests that the xenoliths from hannuoba , ximeng , and puning area have no the trend of lree enrichment , which ratios of lree / hree approximate 1 . therefore , , it is not different from archean lithospheric mantle
稀土元素地球化学研究表明，汉诺坝、锡盟、普宁等地区包体则无lree富集的趋势， lree hree接近于1 ，因此它们与太古代岩石圈地幔不同，稀土元素特征表明它们遭受了强烈亏损。 |
| 9. | It agrees with the fact that the gabbro is intruded by late ordovician granitic pluton . the pre - sinian basement strata exposed in the north kunlun massif are later archean - neoproterozoic milan group , changcheng system kaqiang group , jixian system liushui formation and qingbaikou system sulu formation
被蛇绿岩所分隔的昆北地块上出露的前震旦纪基底地层为：晚太古代-新元古代米兰岩群，长城系卡羌岩群，蓟县系流水岩组和青白口系丝路岩组。 |
| 10. | Four tectonic evolution phases have been made out in this area . they are original crust formed in the archean - early proterozoic era , continental crust shearing in the middle - new proterozoic era , plate tectonic developed in sinian - triassic period and intracontinental orogeny in the middle cenozoic period
将区内构造演化归纳为太古?早元古代原始地壳形成、中新元古代大陆地壳裂解、震旦?三叠纪板块构造体制、中新生代陆内造山等四个演化阶段。 |
