查询词典 rift-sawed

Therefore, the asthenosphere character of the North China rift basin is not distinct.

不过，根据这结果还是可以得出；在华北地区西部的地壳和岩石圈厚度大于东部。

This dissertation draw a conclusion that the deposition of rift basin in early Neoproterozoic in eastern Guizhou consisted of three lithostratigraphic units in Xiang-Qian-Gui rift basin, not only developed typical Banxi Group, but also deposited grayish green Xiajiang Group with flysch suite in eastern Guizhou, and Danzhou group like in Northern Guangxi, by studying depositional sequences, sedimentary systems, depositional lithofacies and paleo-geography, sequence stratigraphy, event stratigraphy (analyzing the stages of volcanic events) and the stratigraphic correlation between Xiajiang group and the other Group in adjacent region and so on, on the basis of predecessors\' data and achievement in scientific research.

本文在前人资料和研究成果的基础上，通过对黔东新元古代早期沉积盆地沉积序列、沉积体系、沉积岩相古地理、层序地层、事件地层等研究以及下江群与邻区地层的对比分析，认为黔东新元古代裂谷系早期沉积涵盖了湘黔桂裂谷盆地三个岩群，不仅有典型的板溪群沉积，也有本区域的下江群灰绿色复理石沉积和桂北丹洲群的沉积存在。

Affected by Hercynian movement and Yanshan movement, two rift systems— the shallow rift system and

受海西运动和燕山运动的影响，形成深浅两套断裂系统。

The earlier rift Phase is composed of two sub-rift episodes withquick subsidence, and the later thermal subsidence was superimposed with rapidsubsidence related to crustal isostasy induced by higher density mantle and cooling ofthe lithosphere.

渤海盆地内的后期热沉降叠加了12Ma以来由高密度地幔及岩石圈冷却诱发的快速均衡沉降。

Combined the geological analysis with analogue modeling experiments,the evolution of the Yinggehai basin could be divided into four main stages:(1) Before 42Ma,controlled by the southeastward extension of the Beibu Gulf basin on the northern continental margin,the Yinggehai basin experienced dextral pull-apart.Bounded by NS-trending Yingxi fault,the transtensional areas mainly are the northwest part and along the eastern boundary of the basin.(2) From 42 to 21Ma,the development of the main rift body in Yinggehai basin was mainly controlled by the southward slip and clockwise rotation of the Indochina block along the Red River fault zone,and the sedimentation was strengthened due to the sinistral transtension.In the east,the subsidence is deepened due to the dextral transtension.(3) From 21 to 10.4Ma,the sinistral movement of the Indochina block slowed down to still.From 21 to 15.5Ma,the northwest part of the basin began to inverse locally because of post-rift thermal subsidence of the whole basin.(4) From 10.4Ma to present,the basin was affected by the dextral movement of the South China block along the Red River fault zone and thermal accident in a new phase at 5Ma.

结合地质分析和物理模拟实验，莺歌海盆地的演化大致可以分为以下4个主要阶段：早期(42 Ma以前)主要受到南海北部陆缘裂解造成的右旋转换伸展作用的影响，但影响范围较小，主要为莺歌海盆地西北部和东部边界。42～21 Ma期间，主要受控于印支地块左行走滑和顺时针旋转作用的影响，莺歌海盆地在此期间发育了主体裂陷体系，东侧受到右旋转换伸展应力场的叠加影响而导致沉降加强；21～10.4 Ma期间，受印支地块逐渐减弱直至停止的左行走滑作用的影响，盆地西北部在21～15.5 Ma期间发生局部反转褶皱，但盆地整体进入以热沉降为主的时期；10.4 Ma以后，盆地受华南地块沿红河断裂右旋走滑作用和5 Ma以后新一期热事件的影响。

Pulling setting presents in southern China in Permian forming rift basins, which extends and develops from the edge to the inside of continent. Under the influence of Dongwu movement, two second order cycles forming by up and down of sea level happened in Yangtze and Huaxia craton. Rift basins in continental margin are primary sedimentary location of LST. But craton areas are the main deposition area of TST and HST. Weathering on land and river sediment or only thin coaly clasolite of marsh facies present mainly in LST deposition.

二叠纪我国南方总体处于拉张背景，发育了由陆缘向陆内延伸发展的裂陷盆地；受东吴运动影响，扬子和华夏克拉通遭形成了两个二级海平面升降沉积旋回；陆缘裂陷盆地是低位期沉积的主要场所，而克拉通区主要为海侵和高位期沉积，低位期主要表现为陆上风化残积、河流沉积或仅发育厚度很薄的沼泽相含煤碎屑岩。

Three basin prototype s are generated in the southeast of Junggar Basin: filling basin in the post-rift sequenceP_2-T_(2-3,foredeep basin in the post-rift sequenceT~~3__3-J_(1-2 and intracontinental foreland basin(J_3-E).

准噶尔盆地东南部发育了3套盆地原型，即P2—T2-3的后裂谷期充填盆地、T33—J1-2的裂谷后前渊盆地、J3—E的陆内前陆盆地的并列叠加作用；发育了3套主力生油岩系，即上二叠统芦草沟组、红雁池组和上三叠统黄山街组、郝家沟组及下、中侏罗统八道湾组、三工河组、西山窑组，并赋存于阜康凹陷、吉木萨尔凹陷、五彩湾凹陷、黄草湖凹陷之中，形成了多个供油中心。

Focusing on the PGE enrichment mechanism in the basic-ultrabasic intrusions in the Panxi rift, firstly, through the interpretation of TM photograph, data processing of regional geochemical exploration and geophysical prospecting results of gravity, magnetic force and seism, we analyzed the controlling effect of structure and magmatic movement on the PGE mineralization; Secondly, through the study of volcanic apparatus, petrography, measurement of comprehensive geochemical section, isotope tracing and dating of typical PGE-rich melanocratic rock series, we discussed the sources of the PGE-bearing mafic-ultramafic intrusions and basalts, their timing, evolvement sequences, the geochemical processes of magma crystallization and fractionation, and the relationship between magma evolution and structural development; Finally, through the analysis of PGE and chalcophile elements concentrations in the melanocratic rock series and the contrastive study with the Noril''sk magmatic Ni-Cu-PGE sulfide deposit, its related continental flood basalts and Siberia Traps, we discussed PGE mineralization characteristics and its enrichment mechanisms in the melanocratic rock series in the Panxi rift.

本项目首先围绕川西地区主要的PGE矿床及伴生矿的地质环境和有关的地质构造背景，通过TM卫片解译、区域化探和重、磁及地震物探资料分析，总体把握构造及岩浆活动对PGE成矿的控制作用；然后通过对典型富PGE暗色岩套的火山机构地质构造、岩石岩相学、地球化学、同位素定年和示踪等方面的工作，分析本区基性－超基性含矿岩体与喷出岩之间的成岩物质来源、侵入时代及演化序列，研究该区同一岩浆房分异结晶的地球化学过程及其随构造发展的耦合关系；最后通过对暗色岩套PGE地球化学剖面分析以及与俄罗斯诺里尔斯克陆内裂谷溢流型玄武岩中PGE矿化的岩石－构造环境对比研究，探讨该区暗色岩套中的矿化特点和富集部位及其PGE富集机制。

The metal elements of the volcanic-hosted massive sulfide deposit have two sources, the copper and zinc are derived from rhyolitic magmas whereas the lead are probably related to old sediments overlying the rhyolites.(4) It is suggested here that the volcanic rocks hosting massive sulfide deposit in the north Qilian orogen, which are previously considered as a bimodal suite of Neo-proterozoic to middle Cambrian age in a continental rift, are virtually related to subduction magmatism in Ordovician age, and there might have no continental rift magmatism of Neo-proterozoic to middle Cambrian in the north Qilian.

Th/Ta比高(5.0～11.7)，εNd为较大的负值(-2.6～-8.4)，流纹岩的形成可能是两个端元组分混合的过程、或是上地壳混染的结果，形成在活动陆缘环境；(3)北祁连块状硫化物矿床成矿金属物质具有两种来源，Cu、Zn等来源于流纹岩，而Pb的来源可能与古老沉积物有关；(4)本文认为，前人厘定的北祁连新元古代-中寒武纪赋存块状硫化物矿床的大陆裂谷双峰式火山岩应是与俯冲作用有关的奥陶纪火山岩，说明北祁连可能不存在新元古代-中寒武纪的大陆裂谷活动。

This paper analyzes the gas reservoir formation condition of all the rift s in the north part of Songliao Basin, and proposes the apparent difference of hydrocarbon source rock development, organic matter evolution and cap rock condition among the rift s.

在深入分析松辽盆地北部各断陷天然气成藏条件的基础上，指出各断陷在烃源岩发育、有机质演化程度和盖层条件上存在明显的差异。

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。