查询词典 MA

Actinolite and pyroxene phenocrysts separated respectively, from chlorite-actinolite schist and altered pillow basalt in the E'rou area of the eastern part of the Shuanghu-Longmuco suture zone, yield well-defined 40Ar/39Ar plateau ages of 235.9±2.6 Ma and 232.5±2.4 Ma. These nearly identical ages are interpreted as defining the age of the tectonothermal event of subduction-related collision along the Shuanghu-Longmuco suture zone.

在藏北龙木错－双湖缝合带东段双湖鄂柔地区，获得绿泥阳起石片岩中阳起石矿物的40Ar/39Ar坪年龄为(235.9±2.6)Ma和枕状玄武岩中蚀变辉石斑晶的40Ar/39Ar坪年龄为(232.5±2.4)Ma，两个年龄具有极好的一致性，记录了中三叠世晚期－晚三叠世早期沿龙木错－双湖缝合带发生俯冲碰撞作用的构造－热事件。

Rafruti ataxite has the youngest exposure age,(6.9± 1.5) Ma, of all ataxites, whereas Ningbo with that of (107± 15) Ma falls within the range of the other ochedrites.

其中Rafruti无结构铁陨石为(6.9±1.5)Ma，在所有无结构铁陨石中是最低的；宁波铁陨石为(107±15)Ma，落在八面体铁陨石的范围内。

By the single zircon U Pb dating method, the quartz syenite porphyny yielded an age of concordance (1 731±29)Ma, and the aegirine augite syenite and syenogebbro are dated upper cocordi...

应用单锆石U Pb法测定年龄，石英正长斑岩谐和年龄为( 1731± 2 9)Ma ，霓辉正长岩、正长辉长岩上交点年龄分别为( 1644± 14)Ma、( 1750± 65)Ma.1650～ 170 0Ma是碱性岩浆活动热构造事件的标志，石英正长斑岩被中元古代晚期的高山河组不整合覆盖，故以 1650～ 170 0Ma作为熊耳群的上限。1650～ 170 0Ma热构造事件是华北地块重大地质事件，有可能是进一步划分中元古代重要的年龄界限。

Based on the petrological and geochronological study of metamorphic complexes from the Grove Mountains, the following conclusions are reached.(1)Exsolution texture is widely found in clinopyroxene in mafic granulites. A peak metamorphic temperature of 850 C was obtained from the reintegrated compositions of exsolved clinopyroxene. The preservation of augite megacrysts suggests a single episode of high-grade metamorphism for the Grove Mountains.(2)The compositional comparison of garnet from pegmatites with that from country rocks demonstrates that garnet in pegmatites is of xenocryst origin, and late amphibolite facies metamorphism does not occur in this area.(3)The Pan-African charnockite and post-tectonic sheet-like granite were first recognized in East Antarctica. Their occurrences suggest a collisional orogeny during the Pan-African time.(4)The SHRIMP U-Pb zircon dating on various rock types indicates that the major metamorphism in the Grove Mountains occurs at c. 550 Ma, and the tectonothermal evolution terminated at c. 500 Ma. The Grenvillian granulite facies metamorphism did not develop in the studied area.(5)The Prydz belt, the second Pan-African suture within the Gondwana suppercontinent, was further comfirmed based on this study. The Gondwana suppercontinent was not formed by the simply juxtaposition of East and West Gondwana, but by the collision of several blocks during the Pan-African time.

本项目通过格罗夫山地区高级变质杂岩的变质岩石学和同位素年代学研究，获得如下重要认识：（1）发现辉石出溶结构，由此获得峰期变质温度为850 C，并根据火成普通辉石的识别确定该区只存在单相麻粒岩相变质；（2）通过伟晶岩中石榴石斑晶与围岩中石榴石的对比研究提出了石榴石的捕虏晶成因，进而确定该区不存在晚期角闪岩相变质作用；（3）在东南极首次识别出泛非期紫苏花岗岩和后构造层状花岗岩，为泛非构造热事件的碰撞造山成因提供了重要佐证；（4）对不同岩石类型的锆石SHRIMP定年精确地限定了格罗夫山地区主期变质作用发生于泛非期，～550 Ma，热事件结束于～500 Ma，年代学数据没有揭示在该区存在格林威尔期麻粒岩相变质作用的迹象；（5）进一步确认了东南极内部普里兹带的存在，它属于冈瓦纳超大陆内部的第二条泛非期缝合带，据此认为冈瓦纳超大陆并不是由东、西冈瓦纳陆块的简单拼合而成，而是多个不同块体拼合的结果。

Some reliable data of MA have been obtained. The electrocardiogram consilience rate of MA in both experimental rabbits and rats was 100%. The results have come to the conclusion that th...

动物实验结果，对家兔及大鼠MA的心电图符合率均为100%(n=17和n=78，体表ECG)，表明采用上述方法能增强系统识别能力，提高MA确诊率及诊断速度，具有较大应用潜力。

In central Himalaya, massif was mainly uplifted in the tectonic model of channel flow during 17~7 Ma at a velocity of ~2 mm/a, then was extruded to earth surface at a much lower velocity. In eastern Himalaya Syntaxis, massif was mainly uplifted in the structural style of titling at a background of isostasy since 4.0~2.2 Ma.

喜马拉雅中段主要在17~7 Ma前以通道流的方式快速隆升，之后的抬升过程相对缓慢；东喜马拉雅构造结则主要在3 Ma以来，以地壳均衡作用为背景的掀斜式抬升为主要隆升模式。

Furthermore, the line and load regulations are 14μV/mA and 4.44ppm/mA, respectively.

此外，这电源调节率和负载调节率分别是14μV/mA和4.44ppm/mA表示。

A total of 29 groups of isotope age data such as Sr-Nd isotope age data and Nd model age data of igneous rocks, including granites, volcanic rocks, dyke swarms, cumulates, and ophiolites, formed in different periods of time are reported in this paper, which show the following two features:(1) igneous rocks including ophiolites formed in this area since 800 Ma BP all have high eNd and low Sri, with most Sri values centered in the range of 0.7045 to 0.7060 and eNd values in the range of 1 to 5, and (2) most of the TDM ages are in the range of 800 to 600 Ma, with only a few at 1000 Ma.

收集了本区不同时期形成的各类火成岩，包括花岗岩、火山岩、岩墙群、堆晶岩、蛇绿岩的Sr－N等30组同位素数据，从中可以看到以下两个特征：①研究区从800Mr以来形成的包括蛇绿岩在内的火成岩都有高εNd低Sri的同位素特征，绝大多数Sri集中在0.7065～0.7060之间，eNd集中在1～5之间。②TDM年龄较多集中在800 ～600 Ma，个别为1000 Ma。

A total of 29 groups of isotope age data such as Sr-Nd isotope age data and Nd model age data of igneous rocks, including granites, volcanic rocks, dyke swarms, cumulates, and ophiolites, formed in different periods of time are reported in this paper, which show the following two features:(1) igneous rocks including ophiolites formed in this area since 800 Ma BP all have high eNd and low Sri, with most Sri values centered in the range of 0.7045 to 0.7060 and eNd values in the range of 1 to 5, and (2) most of the TDM ages are in the range of 800 to 600 Ma, with only a few at 1000 Ma.

TDM年龄较多集中在800 ～600 Ma，个别为1000 Ma。

And 4 highnesses are 56.44-49.65 Ma, 40.40-31.80 Ma, 25.00-17.91 Ma, 11.72-4.45 Ma.

其中，4个高速隆升期分别是距今56.44~49.65Ma、40.40~31.80 Ma2、5.00~17.91 Ma1、1.72~4.45 Ma。

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。