古新统

According to the principle of strontium isotope stratigraphy, we attempt to determine the age of the boundaries for Campanian/Santonian and Maastrichtian/Campanian by 87Sr/86Sr ratios for Gamba section in southern Tibet.

在与国际上同期海相地层锶同位素演化曲线对比的基础上，研究了晚白垩世海相碳酸盐锶同位素组成与主要地质事件的关系；在将本研究锶同位素数据融入到全球中新代海水锶同位素曲线的基础上，综合作出了中新生代海平面变化和锶同位素对照曲线，讨论了全球风化速率，造山事件，气候，海平面变化以及灾变性事件对中新生代海水锶同位素的控制作用；根据锶同位素地层学原理，本研究尝试将碳酸盐锶同位素组成用于海相地层定年上，利用已有的全球海水87Sr/86Sr值-年龄数据库和测试的藏南晚白垩海相碳酸盐的87Sr/86Sr值，确定了岗巴剖面Campanian/Santonian和Maastrichtian/Campanian阶界线，标定了广泛分布于白垩纪的厚壳蛤化石的年龄；本研究还将这些方法推广到了塔里木盆地井下奥陶纪地层的年龄标定，确定了中/上，中/下奥陶统界线，从锶同位素角度获得了古岩溶作用证据，显示锶同位素地层学在解决海相地层对比，年龄确定及在岩溶型油气储层研究中的潜在价值和良好应用前景。

The grain size probability cumulative curves are characterized by the model of single segment with greater change of grain size.

但我们在对济阳坳陷古近系的湖相页岩进行研究时，却在始新统沙河街组中的湖相页岩纹层中发现了一些零散分布的风成粉砂沉积。

It is the first time to apply this method to study sedimentary facies of the Paleocene-Miocene in the Qaidam Basin.

这是首次将定量的沉积相研究方法应用于柴达木盆地的古新统至中新统。

Overturn of foraminiferaoccurs at the P/E boundary that is indicated by the extinction of genus Miscellanea.

始新统遮普惹组底部有孔虫逐渐复苏，除两种为古新世的残存类型外，始新世生物组合全为新的属种，并呈现三个复苏阶段。

Therefore,lacustrine deposit can only exist in the low section of the early Paleocene,and its upper section has been in brackish water and salt water environment' Coarse s...

因此湖相沉积可能仅存在于下古新统下部，下古新统上部可能已进入半咸水及至咸水的环境。

The source rocks of the former are mainly the well-developed, huge thickness of Neogene marine depression sedimentary rocks and Miocene marine sedimentary rocks; those of the latter are significantly the rift sediments of Paleogene continental facies, and large-scale source rocks of medium-deep lacustrine facies and inshore paludal facies with coal measure strata well-developed.

根据南海北部边缘新生代沉积盆地结构、构造特征可将其划分为走滑伸展型和断陷裂谷两大类型，前者以新近系巨厚海相坳陷沉积及海相中新统烃源岩发育为突出特点，后者则以古近系陆相断陷裂谷沉积和大规模中深湖相烃源岩、近海沼泽相煤系烃源岩发育为主要特征，这些烃源岩的发育展布规律、有机质丰度和生烃母质类型、成熟演化特点以及生烃潜力等均差异较大。

Along the low-angle overthrust Early Permian marble and Early Triassic sandy slate were thrust southward over Paleocene-Eocene purplish red conglomerate of the Paleocene-Eocene Fenghuoshan Group and brick-red sandy conglomerate of the Oligocene Yaxicuo Group, forming many klippen of varying scales, and thick fault brecci.

沿低角度逆冲断层，早二叠世大理岩和早三叠世砂板岩自北向南逆冲推覆于古新统—始新统风火山群紫红色砾岩和渐新世砖红色砂砾岩之上，形成大量不同规模的飞来峰；沿主逆冲断层发育厚层断层角砾岩与断层泥，局部形成碳酸盐质糜棱岩。

There are four hydrocarbon source rocks, Palaeocene, Eocene, Oligocene and Miocene.

西湖凹陷发育古新统、始新统、渐新统及中新统四大烃源岩系。

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。

There are two types of sedimentary facies in this region: the alluvial fan and the braided fluvial river.

结绿素－红山地区古新统至中新统发育2种沉积相类型，即冲积扇和辫状河。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。