蛇绿岩
- 网络Ophiolite;Ophiolites;ophiolite suite
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铬铁矿及(或)菱镁矿化通常是与蛇绿岩有关。
Chromite and / or magnesite mineralization is usually related to the ophiolite .
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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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赣东北蛇绿岩的离子探针锆石U-Pb年龄及其构造意义
Shrimp ion microprobe zircon U-Pb age of the ne Jiangxi ophiolite and Its Tectonic Implications
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蛇绿岩套中的变质橄榄岩REE含量较低,以“U”型或轻稀土亏损型为特点。
The metaperidotite in ophiolite suit is characterized by lower REE content and the " U " type of variation or deletion of LREE .
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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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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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拉斑玄武岩SHRIMP锆石年龄352Ma,说明蛇绿岩的形成可持续到晚泥盆世&早石炭世。
Tholeiite has a zircon SHRIMP U-Pb age of 352 Ma , suggesting that the formation of the ophiolites may have continued till the Late Devonian-Early Carboniferous .
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蛇绿岩的枕状熔岩具N-MORB的特征,而其上覆岩系中的枕状熔岩类似E-MORB。
The pillow lava from the ophiolite has the characteristics of N MORB , and those from the overlying rock sequence are similar to E MORB by geochemistry .
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离子探针锆石U-Pb年龄分析结果表明,赣东北蛇绿岩套的高度分异岩浆的结晶年龄为968±23Ma。
The present SHRIMP zircon U-Pb isotopic study suggests that the crystallization age of a highly fractionated magma in the NE Jiangxi ophiolite suite is 968 ± 23Ma .
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西昆仑山库地蛇绿岩的特征及其构造意义南部Pb、V、Cr异常反映早古生代地层与蛇绿岩套的混合地化场。
THE CHARACTERISTICS OF KUDI OPHIOLITE SUITE AND ITS TECTONIC SETTING and the Pb , V and Cr anomalies in the southern part of the province are the resultant fields of the early Palaeozoic rock formations and ophiolite suite .
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探讨了识别洋中脊扩张型(MORS)和洋俯冲带上面(SSZ)蛇绿岩(套)在火成岩组合上的差别。
The difference between MORS – and SSZ – type ophiolites in terms of igneous petrotectonic assemblages is discussed .
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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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从而,在古大洋消失之后形成的碰撞带上同时保存了MORB型和SSZ型两类蛇绿岩。
Therefore , two of MORB-type and SSZ-type ophiolite crop out along collision belt formed after the closing of the old ocean .
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本区洋脊拉斑玄武岩为蛇绿岩的组成部分,指示一套MORB型蛇绿岩组合以及秦岭与杨子板块之间古生代中期&早中生代期间存在的一个古洋盆。
It implys a MORB type ophiolite association and an ancient ocean basin between Qinling and Yangtze plates during middle Palaeozoic early Mesozoic era .
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通过野外5条剖面的初步调查和详细的室内岩石学、矿物学和地球化学的研究,在班公湖地区厘定出MOR型和SSZ型两套蛇绿岩。
MOR - and SSZ - type ophiolites are recognized in the Bangong Lake by the field work and the detailed study of petrology , mineralogy and geochemistry .
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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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凯蒙蛇绿岩的确定表明嘉黎断裂在早期(T3-J1)可能是冈底斯构造带上的一条重要缝合带。
The definition of Kaimeng ophiolite shows that Jiali fault may be an important suture in Gangdese tectonic belt during T_3-J_1 .
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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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由于大洋板块的俯冲作用,在缝合带中MOR型蛇绿岩很少被保存下来,保存较好的大多数为SSZ型蛇绿岩。中国大陆东部大洋板块俯冲的三维黏弹性有限元模型
Therefore , SSZ-type ophiolite is major one preserved well in the orogenic zone . 3-D VISCO-ELASTIC FINITE ELEMENT MODEL FOR THE SUBDUCTION OF THE OCEAN PLATES INTO THE EASTERN PART OF CHINA 'S CONTINENT
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玄武岩及辉绿岩的地球化学显示其具MORB特征,Nb显负异常,环境判别显示该蛇绿岩可能形成于离洋内弧较近的SSZ型弧后盐地。
Geochemistry of basalt and diabase demonstrates they are of MORB characteristic , with Nb negative anomaly , and the environment discriminations suggest that the ophiolite may form in a SSZ-type back-arc basin serves behind a intra-oceanic arc .
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前锋纳木错构造带总体呈WNW向展布,由20多条向北倾斜的逆掩断层、宽阔的韧性剪切带、4条蛇绿岩片带与大量不同类型的构造岩片所组成。
The Nam Co tectonic belt of WNW-trending occurring in west of the Namco Lake is composed of 20 thrust faults of north dipping , wide ductile shear zone , 4 belts of ophiolite pieces and many thrusted rock pieces .
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在西部下志留统下部砂岩中发现有来自SSZ(超俯冲带)型蛇绿岩的碎屑尖晶石,表明北祁连洋的洋壳残片已经仰冲至地表遭受剥蚀。
Detrital spinels are observed in the western Lower Silurian sandstones , and have chemical composition similar to that of those from SSZ ( supra-subduction zone ) type ophiolites , suggesting that the North Qilian oceanic crust has been obducted and eroded .
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据此推测该安山岩类属蛇绿岩成员,其可能产于俯冲带之上(SSZ)的岛弧环境。而该蛇绿岩则属于某种弧间构造背景的蛇绿岩。
It is suggested in this paper that the andesite is a member of the ophiolite suits , which were most probably formed in an island-arc environment of supra-subduction zone ( SSZ ) and the ophiolite belongs to the type of arc tectonic setting .
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本文通过对蛇绿岩基性熔岩的主量、微量和同位素地球化学研究,结果表明库勒湖蛇绿岩具N-MORB特征,推测其形成于小洋盆环境。
The major , trace element and isotope geochemical characteristics of the basic lavas of the Kule Lake ophiolite indicate that the basic lavas have a N-MORB affinity , possibly suggesting a small ocean basin environment for them .
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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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蛇绿岩中伸展变形与古洋盆扩张构造研究综述
Extensional deformation of the ophiolite and spreading structures of paleo-oceanic crust
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蛇绿岩:壳-幔过程的地质记录
Ophiolite as a record of the mantle - crust processes
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四川石棉县石棉蛇绿岩主要由变质橄榄岩和辉长岩组成,玄武岩出露零星。
The Shimian ophiolite is mainly composed of metamorphic peridotite and gabbro .
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对蛇绿岩中所附存铬铁矿的形成环境及其成矿机制做了简略回顾。
The tectonic setting and metallogenic mechanism of ophiolitic chromites are reviewed .
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赣东北蛇绿岩及其地球动力学意义
The Ophiolites in northeastern Jiangxi Province and their geodynamical significance