橄榄岩

在穆斯科克斯杂岩体中，铬铁矿矿层仅产于长石质橄榄岩中。

The chromite deposits in the muskox complex occur only in feldspathic peridotite .

超基性岩的SiO2含量小于45%，它的侵入岩叫做橄榄岩，主要由橄榄石、辉石等矿物组成。

Ultrabasic rocks have a silica content less than 45 % . Peridotite is the typical intrusive rock which consists of olivine and pyroxene .

蛇纹石化橄榄岩的Pb／Ce比值远高于岛弧玄武岩和大陆地壳。

Also Pb / Ce ratio is higher than island arc basalt and continental crust .

其后由于洋内俯冲作用，早先形成的低熔橄榄岩被消减到岛弧之下再度发生熔融形成高Cr（尖晶石）橄榄岩。

Subsequently , the peridotites with low melting degree were subducted beneath the arc area and re-melted , and peridotites with higher Cr # of spinel formed .

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 .

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 .

尖晶石橄榄岩的相对熔融度可据尖晶石的Cr／（Cr＋Al）和单斜辉石的Na含量来判断。

The relative degree of melting of spinel-peridotite may be estimated from the Cr / ( Cr + Al ) ratio of spinel and the Na content of clinopyroxene .

橄辉斜长岩具正堆积结构，Al2O3、CaO、∑REE和La/Yb明显高于二辉橄榄岩。

The olivine-augite anorthosites with cumulate texture is obviously higher in Al_2O_3 , CaO , REE , La / Yb and lower in MgO compared with the lherzolites .

含长二辉橄榄岩以其具有地幔橄榄岩特有的变晶结构和Ng（100）高温变形组构，以及含斜方辉石等特点而区别于堆晶岩。

The Pl-lherzolite differs from the cumulates in having blastic texture and high-temperature deformed fabric of Ng [ 100 ] characteristic of the mantle peridotite and yielding orthopyroxene .

二辉橄榄岩可能代表来自MOR环境下，弱亏损的上地幔残余岩片。

And lherzolites might represent remnants after partial melting of the weakly depleted upper mantle in a mid-ocean-ridge ( MOR ) environment .

变超基性岩蛇纹石化橄榄岩的稀土元素配分具典型的U形特征，显示为具地幔交代作用的LREE富集地幔残余。

The REE distribution of serpentinized peridotite in ultrabasic rocks is the characteristic of U-type , showing that it was the LREE enriched residual mantle experienced in mantle metasomatism .

在从尖晶石橄榄岩向斜长石橄榄岩的相转变过程中，尖晶石强烈富Ti，且其Cr／（Cr＋Al）逐渐增大；斜方辉石中的Ti含量和Cr／（Cr＋Al）同时逐渐增大；

During transition from spinel-lherzolite to plagioclase-lherzolite facies , spinel is very rich in Ti and its Cr / ( Cr + Al ) increases , Ti content and Cr / ( Cr + Al ) of orthopyroxene increase simultaneously ;

该钻孔0～2000m主要由榴辉岩、片麻岩、石榴石橄榄岩和少量片岩和石英岩组成。

The 0 to 2000 m interval of the CCSD main hole consists of eclogite , gneiss , garnet peridotite and minor schist and quartzite .

锥状岩席和BS火山岩包含有大量的上地幔岩石包体（橄榄岩类和辉石岩类）和高压矿物巨晶（歪长石、普通辉石和钛闪石）。

A mass of pyrolite xenolith ( such as peridotite andpyroxenide ) and high-pressure mineral megacrysts ( such as anorthoclase , augite and kaersutite ) are found in cone sheets and BS volcanic rocks .

大兴安岭捕虏体与中国东北其它地区橄榄岩捕虏体具有相似的Sr-Nd，Re-Os同位素组成。

The xenoliths from the Great Xing ' an Range show similar Sr-Nd , Re-Os isotopic compositions with other places in the northeast China peridotite xenoliths .

地幔橄榄岩主要是方辉橄榄岩，其主要氧化物成分较为单一，具LREE富集、Eu亏损的U形REE配分模式，亏损强不相容元素；

The mantle peridotite is composed mainly of harzburgite , which shows a narrow range in the major elements , enriched light rare earth elements ( LREE ), U-type REE patterns with negative Eu anomaly , and strongly depleted incompatibility elements .

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.

Os同位素资料显示，由地幔橄榄岩包体所反映的新生代岩石圈地幔具有年轻性质，与古生代时的岩石圈地幔截然不同。

The Os isotopic data from the mantle xenoliths in the Cenozoic basalts suggested that the lithospheric mantle in the Cenozoic is juvenile , much different from that in the Paleozoic , which indicated that the present lithospheric mantle is not the residue after the thinning .

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 .

这里的壳幔过渡带厚度可达3km，推测为橄榄岩与基性麻粒岩互层。

The thickness of the transition zone between the crust and the mantle is about 3 km and composition of the zone might be the interbed of peridotite and basic granulites .

数百公里尺度地幔橄榄岩的PGE分布的不均一性除被认为由于增生阶段的不均一造成外，更可能是由于地幔形成之后的地幔过程、核-幔及壳-幔相互作用造成。

Heterogeneity in PGE content of the mantle peridotites on scales of ~ 100 kilometers might be caused by inhomogeneity during the earth accretion , but a more possible explanation is a result of the mantle processes , core mantle or / and crust mantle interaction .

喷发时代为100Ma的阜新玄武岩所捕获的橄榄岩主体是饱满的，说明华北东部部分地区在此之前曾有过地幔置换作用。

The fertile peridotite xenoliths in the Fuxian basalts erupted at 100 Ma indicate that the early mantle replacement beneath the eastern North China Craton took place in part of eastern North China beforehand .

亏损上地幔中的富钾熔体和碳酸盐交代作用：来自CCSD预先导孔橄榄岩的地球化学证据

K-Rich and Carbonatic Melt Metasomatism in Depleted Upper Mantle : Geochemical Evidences from Peridotites in Pre-Pilot Hole of Chinese Continental Scientific Drilling Project Structural Hydroxyl of Rutile in UHP Metamorphic Rocks from Chinese Continental Scientific Drilling Project ( CCSD ) and Areas Nearby and Its Implication for Geodynamics

中国大陆科学钻（CCSD）附近幔源橄榄岩包体的发现对东海地区岩石圈厚度、物质组成、热结构和底侵作用动力过程提供了重要约束。

The discovery of the mantle-derived xenoliths in the area adjacent to the site of the CCSD ( Chinese Continental Scientific Drilling ) provides an important constraint for understanding the composition , thickness and thermal structure of the lithosphere as well as the underplating process in the Donghai area .

由该地温线推导的壳幔边界为38km左右，但尖晶石二辉橄榄岩在32km左右即已开始出现，表明存在上地幔物质的底侵作用。

The crust-mantle boundary as derived from this geotherm is located at a depth of about 38 km , but spinel lherzolite was found at a depth of 32 km , indicating the under-plating of upper mantle materials .

下扬子地区若干上地幔橄榄岩的显微构造研究

Microstructures of some peridotites from upper mantle in low Yangtze area

岩石圈之下是由部分熔融的橄榄岩所组成的软流圈。

Below the lithosphere is the rheosphere comprising partly fused peridotite .

女山和盘石山橄榄岩包体中的水：红外光谱研究

Water in peridotite xenoliths from Nushan and panshishan : FTIR study

橄榄岩中尖晶石的氧同位素继承性与晶体结构转变

Oxygen isotope inheritance and structural transition of spinel in peridotites

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 .