查询词典 Oligocene

Through the age analysis on apatite and zircon fission track, there have five stages of tectonic movements, respectively occurred in late Trias, from mid-late period in early Cretaceous to late Cretaceous, Eocene, Oligocene and Miocene.

通过对盆地内磷灰石和锆石年龄分析，焉耆盆地存在5期构造运动：晚三叠世、早白垩世中晚期-晚白垩世、始新世、渐新世和中新世。

Sangzhu anticline outcropped on the surface is virtually a pseudo-anticline, of which the Paleocene Artashi formation and the Eocene-Oligocene Bashibulake formation in the limbs are emplaced by the backthrust.

6地表出露的桑株背斜是一个&假背斜&。其两翼上对称分布的古新统阿尔塔什组与始新统—渐新统巴什布拉克组地层实际上是被反冲断层推到一起的。

Structural traps may form in three different periods, with anticlines associated with faults in the early period (Eocene-Oligocene), drape structures in the middle period and compressive anticlines in the late period (Pliocene-Holocene).

圈闭形成有3期，早期形成的构造圈闭主要是与断层相关的背斜构造，中期形成的构造圈闭主要是披覆背斜，晚期形成的主要是挤压背斜。

This implies a major stage of crustal growth in Proterozoic time and remelting of the crustal material in Early Jurassic time;(5) The Oligocene-Miocene adakites contain magmatic zircons that show similar Hf isotope compositions to the Cretaceous-Paleogene Gangdese batholiths, providing a key constraint that allows evaluation of the nature and timing of crustal thickening in southern Tibet owing to the India-Asia collision; and (6) As a whole, the Hf isotope information observed in zircons from the above Transhimalayan rocks demonstrates a temporal variation in εHf values, and thus TDMC ages, that suggests multiple stages of orogenic or crustal formation events.

五、渐新世、中新世的埃达克岩，其岩浆锆石的铪同位素特徵与白垩纪、古第三纪冈底斯岩浆相似，因而为藏南在印亚碰撞以后，地壳增厚的时间与机制提供了关键性的制约；六、综观上述藏南火成岩中的锆石，它们与时变化的铪同位素初始值及其对应的模式年龄记录了拉萨地块多阶段的造山与地壳形成历史。

Results Xunhua-Guide area is characterized by step-shaped low-relief at different elevation. The low-relief surfaces developed above the newer strata in sedimentary basin among the Oligocene to the lower Pleistocene are in higher elevation, but above the older strata, are in lower elevation. The elevations of all above low-relief surfaces are lower than those of the planation surface above the bedrocks in the thrust belts. The low-relief surfaces of terraces, developed on both sides of the deep-cutting valleys within the basins, are lowest in elevation.

结果 循化－贵德地区地形形态总体呈台阶状结构，在不同海拔高度存在低起伏地形；发育于盆地沉积地层之上的低起伏面表现为年代越新的地层之上低起伏面高程越高，越老的地层高程越低，并且它们均低于发育于逆冲带基岩之上的夷平面；发育于盆地深切河谷两侧阶地之上的低起伏面海拔高程总体较低。

The main conclusions are those:(1) the cause of hot-dry climate before elevation of plateau is that the efficiency of atmospheric heat engine is lower than after the elevation owing to flatter global landform;(2) at the beginning of Oligocene Epoch,the horizontal scale of plateau reached the cr...

主要结论：（1）高原隆起前的干热气候是由于隆起前全球地势平坦，致使大气热机效率很低之故；（2）渐新世初高原的水平尺度达到了斜压大气地转适应的临界尺度，大气环流从南北两极&两涡对峙&突变成地球三极的&三涡鼎立&，气候发生突变；（3）分析了2.5Ma时高原抬升到2000m这一重要临界高度后大气环流的一系列相应变化；（4）计算、比较了最大冰期地气系统能量平衡与现代的差异，并由此分析了当时的气候状况

The analytical results show that the neotectonic activities resulted from the nearly north-south-trending compressional stress in the region. Based on previous research results, the neotectonic activities in this area can be divided into five evolution stages: late Eocene to Oligocene, Miocene, late Pliocene to early Pleistocene, early Pleistocene to Mid-Pleistocene, and Mid-Pleistocene to now.

研究表明，新构造以断裂构造为主，是区域近南北向挤压应力作用的结果；结合前人研究成果，可以将伊犁盆地新构造运动分为五期：始新世晚期－渐新世、中新世、上新世末期－早更新世、早更新世－中更新世、中更新世至今。

On the basis of analyzing regional structure and evolution characteristics, It is considered that undergoing 3 evolutions of Eocene-Oligocene, Miocene and Pliocene exploration, Burma central basin Formed in Tertiary and can be divided into 2 secondary grade structural units, i.e. western deep depression and eastern shallow depression, and 11 third grade structural units, such as Irrawaddy sag, Prome sag, Salin sag, Chindwin sag, Hukawng sag, Putao sag, Shwebo sag, Inlelake sag, Salween sag, Sittang sag and Pegu upwarping.

基於对区域构造特徵和演化的分析，认为缅甸中央盆地形成於第三纪，经历了始新世－渐新世、中新世和上新世三期构造演化，可划分为西部深坳区和东部浅坳区2个二级构造单元及Irrawaddy凹陷、Prome凹陷、Salin凹陷、Chindwin凹陷、Hukawng凹陷、Putao凹陷、Shwebo凹陷、Inlelake凹陷、Salween凹陷、Sittang凹陷、Pegu凸起等11个三级构造单元。

At the rear was an innovative combination transaxle with the gearbox, clutch, differential, and inboard-mounted drum brakes.

在后面是与变速箱，离合器，差的创新结合变速，和内侧安装鼓式制动器。

For more people can apprecaite and have the master work, there is reproduction painting appears in the market, the large various selection of paint,the high saturation of color plus the plentiful sfumato, to make the reproduction perfect copy and detail as original painting, so as to meet the requirment of amateurs who love art paintings,they do not need to pay high price to get classical paintings.

颜料色域广，色彩饱和度高，色彩层次丰富，图像色彩还原真实，能完美的复制原作，满足艺术爱好者欣赏，艺术爱好者们不用支付昂贵的价格就能拥有经典油画。