查询词典 Oligocene

According to the wide development of the typical warm-phase salt minerals such as primary glauberite and its thin bed in the Qianjiang Formation, it may be inferred that the dry palaeoclimate in the drainage area of the Jianghan Basin during the Late Eocene to Early Oligocene was of warm-dry type, rather than of cold-dry type.

根据潜江组中典型暖相盐类矿物原生钙芒硝及其薄层的广泛发育，可以推断江汉盆地区域在晚始新世－早渐新世潜江组沉积期间，所出现的干旱古气候属于暖旱型而不是寒旱型。

Organic geochemical analysis shows that oils in the lower Oligocene reservoirs in Gas Hure,western Qaidam basin,are of typical salt lake origin and have the characteristics of both low mature oil and mature oil.

有机地球化学分析表明，尕斯库勒渐新统下部油藏原油为典型的盐湖相油，既有低熟油特征也有成熟油特征。

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。

During the Cenozoic, the evolution of the sag might be divided into three stages: during the Eocene, because of regional extension effect of the NW-SE-striking, it was a ramp depression controlled by the Cangdong fault; during the Oligocene, it might have subjected to the combined effects of the NW-SE-striking regional extension and the dextral slipping of the NNE-striking deep fracture zone; during the Neocene and the Quaternary, though the regional extension had mainly stopped, the dextral slipping continued. Inside the slip zone, the local, SN-striking extension related to the dextral slipping became more and more apparent.

新生代演化分为3个时期：NW-SE向区域伸展作用，凹陷是一个由沧东断层控制的断坡凹陷；渐新世，凹陷受NW-SE区域伸展和NNE向深断裂带右旋走滑的共同作用；晚第三纪到第四纪，区域伸展作用基本停止，走滑作用仍在继续，由走滑作用导致的SN向局部伸展作用显得更加突出。

The extinction or appearance of these Ostracoda always occurred in a short time interval, and can be correlated locally and globally, so they are of importance in bioeventstratigraphy. This article listed six such biological events in Qaidam Basin and discussed their causes. The extinction of Cetacella reflected temperature decrease at global scale and changes of palaeoclimate zones during the latest Jurassic and the earliest Cretaceous; The rapid decline of Cypridea in the earliest Cretaceous may be a result of the strikes of small planets; at the latest middle-Eocene Austrocypris became extinct, and at Oligocene Hemicyprinotus disappeared. These events related to the changes of the geological conditions at that time. The explosion of Cyprideis at the middle-Miocene was because the rise of Qinghai-Xizang Plateau which resulted in the dry climate and development of salt lakes.

这些水生生物的绝灭或发生均很迅速，在区域或全球范围内均可对比，具有生物事件地层学意义：Cetacella属的绝灭可能是侏罗、白垩纪之交全球性的古气候降温和气候带变化在柴达木盆地的反映；早白垩世之后Cypridea的迅速衰退是地外因素灾变的结果；中始新世晚期的Austrocypris的绝灭、渐新世Hemicyprinotus的绝灭都与当时地质条件的改变存在著内在的联系；中中新世Cyprideis的爆发推断是青藏高原隆升，导致气候乾燥、湖水咸化的结果；而晚更新世晚期1。

The factors responsible for the gas richness in offshore Bohai are represen ted as follows:The thicker deposition sediments,it made the main source rock-Eoc ene Shahejie Formation reach overmature to generate gas;there is huge thickness of Oligocene source rock-Dongying Formation;there are strong Tertiary tectonic m ovements and high heat-flow in the offshore.

海域天然气比陆上富集的主要因素表现在：沉积厚度大，使得盆地内主要烃源岩始新世沙河街组达到高成熟生气阶段；存在巨厚的渐新世东营组烃源岩；具有较强的晚期构造运动和较高的热流值，在浅层也有天然气聚集的领域。

The heavy mineral located in sand between Palaeocene and Oligocene of 20 drilled wells in Tangyuan Rift are analyzed by relative analysis and polymer with Q type analysis and indicates that,in test areas,variation rules of heavy mineral combination are vertically controlled by structural factors,while horizontal distribution is influenced by source rock property in source areas.

采用相关分析及Q型聚类分析方法对汤原断陷20口钻孔古新世—渐新世的砂岩中重矿物进行统计分析，指出了研究区重矿物组合纵向上变化规律明显受构造因素的控制，横向上的分布受物源区源岩性质的影响。

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。

At the end of Oligocene to Miocene, due to lateral extrusion of material in the collisional belt, west Yunnan and adjacent region between the Red River-Ailao Shan and the Saging faults escaped to SSE.

渐新世末—中新世，高原地区的物质侧向挤出，红河—哀牢山断裂和实皆断裂之间的滇西及邻区向南南东脱逸。

Oligocene-Miocene volcanic rocks are shoshonite,late Miocene-Pleistocene volcanic rocks are High-k calc-alkaline.

渐新世-中新世火山岩以钾玄岩系列为主，部分为高钾碱性系列，火山活动强烈出露面积大而广泛。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。