方岩
- 与 方岩 相关的网络例句 [注:此内容来源于网络,仅供参考]
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This rock zone, with a NE striking, the whole length of 1 400 km and the width of 100~150 km, is characterized by not onlyalkaline rocks (analcite biotite olivine melilitites, leucititic alnoites, nephelite syenites, aegirite augite syenites, melanite syenites, riebeckite syenite and aegirite bearing quartz syenites) and alkaline granite (riebeckite granite, and aegitite augite riebeckite granite), but also a lot of syenites, monzonites and alkaline feldspar granites or miarolitic K feldspar granites.
该岩带全长约1400km,宽100~150km,不仅发育有狭义的碱性岩(方沸黑云橄榄黄长岩、白榴黄长煌斑岩、霞石正长岩、霓辉石正长岩、黑榴石正长岩和含霓石石英正长岩)和碱性花岗岩(钠闪石花岗岩、霓辉石钠闪石花岗岩),还发育有大量的正长岩类二长岩类碱长花岗岩或晶洞钾长花岗岩。
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It mainly reaches the following achievements:1 Through the research of petrology and geochemistry, it is found that dunite takes over 85 percent in ultramafic intrusion, which largely contains Mg(39.66%-47.20%) and Fe(733%-11.17%). The containing of Mn. K. Na, P and Ti is less than 0.1 percent respectively. So it has typical characteristic of leaving of mantle rocks, while it doesnt have partly characteristic of melting.
主要取得以下认识: 1 通过对超镁铁质岩体的岩石学、地球化学研究发现,松树沟超镁铁质岩体主要由纯橄榄岩和方辉橄榄岩组成,纯橄榄岩占85%以上,变质浅,变形相对简单,富含Mg(39.66%—47.20%)和Fe(7.33%—11.17%),Mn、K、Na、P和Ti的含量通常都低于0.1%,具有明显的地幔岩残留体性质,而不具有部分熔融的特征。
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There are two types of peridotites within this UHP belt.(1) Garnet peridotite consists of garnet lherzolite, garnet-bearing dunite, garnet-free dunite and garnet pyroxenite, which could be considered as one of the critical rock types in a continental-type subduction zone.
根据岩石学特征,我们确定柴北缘超高压带中发育有两种类型的橄榄岩:(1)石榴橄榄岩,岩石类型包括石榴二辉橄榄岩、石榴方辉橄榄岩、纯橄岩和石榴辉石岩,是大陆型俯冲带的标志性岩石。
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There are two types of peridotites within this UHP belt.(1) Garnet peridotite consists of garnet lherzolite, garnet-bearing dunite, garnet-free dunite and garnet pyroxenite, which could he considered as one of the critical rock types in a continental-type subduction zone.
根据岩石学特征,我们确定柴北缘超高压带中发育有两种类型的橄榄岩:(1)石榴橄榄岩,岩石类型包括石榴二辉橄榄岩、石榴方辉橄榄岩、纯橄岩和石榴辉石岩,是大陆型俯冲带的标志性岩石。
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The mineral chemistry, trace elements and Sr-Nd isotopic geochemistry of different types of deep-seated inclusions indicate that Group Ⅰinclusions in western Shaudong could be the relicts of high degree of partial melting of the mantle-derived peridotites and then subjected to mantle metasomatism; the dunite and harzburgite in Group Ⅱ inclusions could be resulted from the metasomatism of silica-rich melts in the upper mantle; the olivine-pyroxenite and pyroxenite in Group Ⅱ and Group Ⅲ inclusions could be magmatic cumulates derived from magma underplating in the upper mantle.
不同结构类型深源岩石包体的矿物化学、元素和同位素地球化学研究表明,鲁西具有变质变形结构特征的橄榄岩类岩石包体为岩石圈地幔橄榄岩部分熔融后的残留体,其后又遭受了地幔交代作用的改造;具有变质变形结构,并叠加有矿物反应结构的纯橄岩和方辉橄榄岩类包体为古老岩石圈地幔被富硅质熔体改造的结果;具有残留岩浆结晶结构的橄榄岩、橄辉岩类岩石包体以及具有变晶结构或堆晶结构的辉石岩类包体为地幔更早期岩浆作用的在上地幔的堆积体。
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The meta-peridotite consists of dunite, harzburgite, lherzolite, feldspar-bearing lherzolite and garnet-bearing lherzolite and contains residual spinel with Cr#s [100*Cr/] of 30-57 and Mg#s [100*Mg/(Mg+Fe2+)] of 50-75, indicating an Al- and Mg-rich series.
变质橄榄岩主要为纯橄岩、方辉橄榄岩、二辉橄榄岩、含长二辉橄榄岩和含石榴石二辉橄榄岩,岩石中残余尖晶石的Cr'值=100×Cr/(Cr+Al为30~57,Mg'值=100×Mg/(Mg+Fe2+为50~75,指示一个富Al和Mg成分系列。
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Rock types of lithospheric mantle beneath Eastern-North China platform include harzburgite, garnet and/or chromite lherzolite, dunite, wehrlite, pyroxenite, phlogipitite, eclogite, and metasomatic rocks.
华北地台东部古老地幔岩石类型包括方辉橄榄岩、石榴石/铬尖晶石二辉橄榄岩、纯橄榄岩、异剥橄榄岩、各种类型的金云母岩和辉石岩、榴辉岩及交代岩石。
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The metasomatism resulted in decreasing content of orthopyroxene, increasing contents of clinopyroxene and olivine in peridotite, and the transformation from harzburgites to wehrlites.
这种交代导致橄榄岩中斜方辉石逐渐减少,单斜辉石和橄榄石逐渐增加,从而使方辉橄榄岩渐变成易剥橄榄岩。
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The 43-57km lithospheric mantle could be consist of a suite of cumulates with crystalloblastic texture, cumulate texture and relic magmatic crystalline textures, such as orthopyroxenite, websterite, clinopyroxenite and olivine-pyroxenite. The lithospheric mantle of 43km to Moho discontinuity could be spinel harzbergite and minor spinel lherzolite, in which the spinel harzbergite and minor spinel lherzolite xenoliths are discoveried. The Moho in the region could be an transitional zone composed of cumulates in petrology.
它既包括了具变晶结构的斜方辉石岩、二辉石岩,又包括了具有残留岩浆结晶结构与堆积结构的橄辉岩和辉石岩;向上至莫霍面,应为尖晶石方辉橄榄岩,并有少量尖晶石二辉橄榄岩,本区发现的尖晶石二辉橄榄岩(T7-21)和尖晶石方辉橄榄岩(T35、T58)可能来自该层;本区莫霍面在岩石学上可能为一个由堆积岩组成的过渡带(3~5km)。
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The ultramafic rocks outcropped at the Altyn region are all harzburgites. Remant grains of primary minerals have melted residual texture and elastic deformation texture under high temperature and pressure. The whole-rock analyses show their low TiO〓 contents (0.01~0.04%), low Al, Ca and high MgO contents and wide Mg〓 range (89.35~95.57). Rare earth patterns have two types, namely tabacco pipe-shped and LREE-shaped, of which the former is often seen. The chondrite-nomalized Yb values of these analyses are all lower than 1. The spinels have low Ti and high Cr content and most spinels have Cr# higher than 60. All of the above characteristics show that the ultramafic rocks in the Altyn fault zone are components of metmorphic peridotites of ophiolite from depleted mantle source and most ophiolites from this zone belong to supra-subduction zone type ophiolite with a few mid-ocean ridge basalt type.
阿尔金露头区的超基性岩全为方辉橄榄岩,残余的新鲜矿物颗粒发育有熔融残余结构和高温高压下塑性变形结构,全岩分析显示样品TiO〓的含量低,为0.01~0.04%,具有低的Al和Ca,MgO含量高,Mg〓为89.35~95.57;稀土配分型式有两种,即烟斗型和LREE亏损型,前者占绝大多数,Yb球粒陨石标准化后的值全都小于1;尖晶石低Ti高Cr,大部分尖晶石的Cr〓大于60,上述特征说明阿尔金超基性岩是蛇绿岩的地幔橄榄岩成员,来自亏损的地幔源区,阿尔金蛇绿岩大多属于俯冲带之上型蛇绿岩,有少量的大洋中脊型蛇绿岩。
- 推荐网络例句
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The split between the two groups can hardly be papered over.
这两个团体间的分歧难以掩饰。
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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。
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The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.
聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力