辉长岩
- 名gabbro
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辉长岩中ε(Nd)值为-6·5,表明其源区岩石不具亏损地幔特征;
The - 6.5 ε ( Nd ) value of gabbro shows no characteristic of depleted mantle .
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辉长岩的SHRIMP锆石UPb定年(494±10(2σ)Ma)表明其形成于晚寒武世早奥陶世。
The SHRIMP Zircon dating of gabbro ( 494 ± 10 ( 2 σ) Ma ) suggest it is of Late-Cambrian to Early-Ordovician age .
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青海南部蛇绿岩中辉长岩锆石SHRIMPU-Pb定年和岩石地球化学特征
Zircon SHRIMP U-Pb dating and lithogeochemistry of gabbro from the ophiolite in southern Qinghai Province
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岩石化学、岩石地球化学等方面的资料表明,辉石橄榄岩、辉长岩具有低Al、贫Ca和富Na的特点,MgO/(MgO+FeO)比值为0.25,MgO含量偏低。
The data of rock chemistry and geochemistry indicate that the pyroxene - peridotites and gabbros have low Al , Ca and MgO but high Na .
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本文报道了东昆仑造山带三叠纪辉长岩、花岗岩类及其包裹体的Pb、Sr、Nd和O同位素组成。
This paper reports Pb , Sr , Nd and O isotopic compositions of gabbro and granitoids formed in East Kunlun orogenic belt in Triassic .
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湖南道县辉长岩包体的锆石U-Pb法定年及其地质意义
Single grain zircon U-Pb dating of gabbro xenolith from Daoxian alkaline basalt , Hunan Province
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皖南蛇绿岩套辉长岩锆石U-Pb定年以及元素和氧同位素研究
Zircon U-Pb Dating and Element and Oxygen Isotope Geochemistry of Gabbro from Ophiolites in South Anhui
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福建同安角闪辉长岩的矿物化学、~(40)Ar-~(39)Ar年龄及地质意义
Mineral Chemistry and ~ ( 40 ) Ar - ~ ( 39 ) Ar Ages of Hornblende Gabbro from Tong'an , Fujian Province and Their Geological Significance
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西昆仑库地伟晶辉长岩和玄武岩锆石SHRIMP年龄:库地蛇绿岩的解体
Zircon SHRIMP Age Determination of the Giant-crystal Gabbro and Basalt in K ü da , West Kunlun : Dismembering of the K ü da Ophiolite
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产于细粒辉长岩和层状辉长岩中的单斜辉石和斜方辉石,它们的Eu和Ce异常的差异,主要受控于矿物结晶时的氧化还原条件。
Eu and Ce anomalies in clinopyroxene and orthopyroxene from finegrained gabbro and bcdded gabbro could be attributed to the oxidation and reduction conditions during the crystallization of the minerals .
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本文系统地报道了大兴安岭北部塔河辉长岩的主量元素、微量元素和锆石Hf同位素特征,重点讨论了塔河堆晶辉长岩体的岩石成因、原始岩浆的源区特征及其地质意义。
In this paper , geochemical data of the major and trace elements , and Hf isotope are reported for the Tahe cumulate gabbro exposed in the northern Da Hinggan Mountain .
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通过对杂岩体中辉长岩和二长花岗岩的锆石进行SHRIMP测年,分别获得403.3±7.2Ma和394±13Ma两个极为接近的岩浆锆石年龄以及1116Ma的继承锆石年龄。
The SHRIMP dating of gabbro and adamellite samples yielded magmatic ages of 403.3 ± 7.2 Ma and 394 ± 13 Ma and inherited zircon age of 1 ? 116 Ma .
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它们分属两个不同的岩浆系列:辉长岩属拉斑系列,TiO2,Fe~(3+)/Fe~(2+)和REE丰度较高;
They were derived from different magma series : the gabbro was derived from tholeiitic magma series with higher TiO_2 , REE abundance and Fe ~ ( 3 + ) / Fe ( 2 + ) ratio ;
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对皖南蛇绿岩套辉长岩分别进行锆石微区U-Pb定年、全岩主微量元素分析和Sr-Nd同位素分析、矿物氧同位素分析。
Zircon U-Pb dating , whole-rock major and trace elements , Sr-Nd isotopes , and mineral O isotopes were determined for samples from ophiolites in south Anhui .
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样品尺寸为40cm×40cm×20cm,辉长岩、大理岩各4块。
The scale of rock samples is 40 cm × 40 cm × 20 cm . The samples of gabbro and marble is four piece respectively .
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新疆库地蛇绿岩堆积厚度达1500m以上,主要岩石由纯橄岩、斜辉橄榄岩、辉长岩、块状玄武岩、枕状玄武岩、玄武安山岩、硅质岩、粉砂岩等组成。
The ophiolite is composed of dunite , peridotite , gabbro , massive basalt , pillow basalt , basaltic andesite , silicalite and siltstone with thickness of over 1500 m.
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层状辉长岩上部、下部岩系辉石往往表现出不同的交换速率和交换程度,流体的初始δ18O值也显示出较大的不均一性。
Pyroxenes from upper and lower zones in layered gabbros show remarkable differences in their exchange rates and exchange extents , with a fairly heterogeneous fluid in its initial oxygen isotopic composition .
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本文将西准噶尔地区蛇绿岩分为两类:一类是变质橄榄岩+辉石岩+辉长岩组合(简称PPG系列),它们遵循富Ca的演化趋势,发育冶金型铬铁矿床;
The ophiolites in the Western Junggar are divided into two types : one of them is assemblage of metamorphic peridotite + pyroxenite + gabbro ( abbreviated to PPG series ), the series follows Ca-rich evolutional trend and grew the metallurgical type chromite deposit .
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本实验研究采用国际岩石力学学会建议的V型切口短棒岩石断裂韧度试件,岩石为瑞典的卡莱克思(Kallax)辉长岩,试件直径为71.4mm。
The author used the chevron notched short-rod specimen for fracture toughness test suggested by ISRM in his experiment . The specimen is Kallax gabbro from Sweden with diameter of 71.4mm .
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基性辉长岩中锆石SHRIMPU-Pb年代学的研究表明425±8Ma古亚洲洋南缘南天山一带存在一小洋盆。
The zircons from basic gabbro have obtained an age of 425 ± 8Ma by SHRIMP U-Pb method , indicating that a small oceanic basin may exist in the southern Tianshan along the southern margin of the Paleo-Asia ocean .
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该岩带位于北昆仑晚古生代沟弧带内,长达40km,岩石类型为辉长岩。
This zone is located in the north part of Kunlun which belongs to the Late Paleozoic trench-arc zone . The length reaches 40 km and the rock type mainly is gabbro .
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根据粗集料的单因素捣实试验,确定了辉长岩Sup-16级配骨架最优结构。
On the basis of the single factor dry rodded test of coarse aggregate , the optimal framework structure of gabbro Sup-16 gradation is given out .
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侏罗纪末~早白垩世初的火山活动除有熔岩(146Ma,137Ma)喷出外,还发育有辉长岩侵入体(135Ma)和辉绿岩岩墙(129Ma)等次火山岩。
The Late Jurassic-Early Cretaceous activity produced basaltic and basaltic andesitic lavas ( 146Ma , 137Ma ), followed by gabbro intrusion ( 135Ma ) and aplite dyke ( 129Ma ) .
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在常应变率为5×10~(-5)/sec,对四组16个房山花岗岩和济南辉长岩试件进行了从100MPa到400MPa的各种围压和从25°到250℃的各种温度的试验。
Eight series of tests at the constant strain rate of 5 × 10 ~ ( - 5 ) / sec on samples of Fangshan granite and jinan gabbro have been performed for various confining pressures and temperatures ;
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在时间上,寒山金矿的成矿时代为339±10Ma,与寒山辉长岩同属华力西期,而且成岩时代早于成矿时代,因此推测寒山辉长岩可能为寒山金矿提供了热源。
The ore-forming age of the deposit is 339 ± 10 Ma , being of Hercynian too . The petrogenic age is earlier than the ore-forming age , possibly suggesting that the rock body provided heat for the deposit .
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本文结合历次对该蛇绿岩的观察,重点就最近该蛇绿岩中石英辉长岩的锆石SHRIMP-Ⅱ测年给出510Ma±4Ma及其构造意义作一简要报道。
In combination of previous observations of the ophiolite , this paper mainly reports the recent zircon SHRIMP-II dating of quartz gabbro in the K ü da ophiolite ( which yields an age of 510Ma ± 4Ma ) and its tectonic significance .
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利用高温高压多功能三轴实验装置对四川省攀枝花辉长岩进行了动态和静态部分熔融实验研究,实验的围压为450~800MPa,温度区间为900~1200℃。
This paper presented the results of a preliminary experimental study on partial melting of fine and medium grained gabbros from Panzhihua , Sichuan Province . The experiments were conducted in conditions of confining pressure of 450 ~ 800 MPa and temperature of 800 ~ 1 200 ℃ .
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不同应力途径下辉长岩的微破裂特征
Observation of microcracks within gabbro in experiments along various stress paths
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福建平潭角闪辉长岩结晶过程的矿物学记录
Mineralogical record of crystallization processes of Pingtan hornblende gabbro , Fujian
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辉长岩脆-塑性转化及其影响因素的高温高压实验研究
An experimental study on the brittle - plastic transition in gabbro