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A chiefly amphibole rock with minor plagioclase and little quartz.

一种主要由闪石和斜长岩组成的变质岩。

A metamorphic rock composed chiefly of amphibole and plagioclase .

一种主要由闪石和斜长岩组成的变质岩。

The anorthosite and similar rock types in the highlands and basalt lavas in the marea are the Moon's basic building blocks.

斜长岩和类似的岩石在高地典型,而玄武岩沉积在月球低地构成了月亮基本的建筑积木。

Although scientists had postulated this phase of lunar history based on the Apollo samples, the proof came from the Clementine and Lunar Prospector data, which indicated the global distribution and large abundance of anorthosite.

虽然科学家根据阿波罗太空船所采集的样本提出了关于月球这段历史的假说,但是证据却来自克莱门蒂号和月球探勘者号的观测,显示斜长岩丰富且分布全球。

The crust became the white anorthosite, which floated atop the magma to form the lunar highlands. The basalt erupted later and subsequently solidified in the lowland marea.

这个壳后来变成白色的斜长岩,它漂在岩浆上面形成月球的高地,后来,玄武岩的岩浆喷发并且凝固在低地区域。

This conclusion, combined with the data obtained from the short-lived Hf-W and Sm-N d isotopic systematics, suggests that the Moon was initially accreted at 4.5 Ga, followed by development of the global lunar magma ocean. The primary lunar crust is composed by ferroan anorthosite which was produced by flotation of plagioclase during crystallization of the LMO. However, the mafic minerals, coevally crystallized with the plagioclase, sank to the base of the LMO due to their high density, and made up the main part of the lunar mantle, which served as the source during later mare basaltic magmatism.

根据这一年代资料,结合对月岩样品进行的短半衰期Hf-W与Sm-Nd同位素体系的研究结果,认为月球大致形成于45亿年,其后开始由岩浆海导致的内部核-幔-壳的分异,岩浆结晶的低密度斜长岩构成最初的月壳,而密度大的岩石构成月幔,而此月幔则成为后来月海玄武岩的主要岩浆源区。

Microstructural studies of three types of tectonites from eastern Liaoning area with different deformation characteristics (gneissic, banded and mylonitic structures) by means of microstructural analysis, transmission electron microscope analysis shows us they have different microstructures and Submicrostructures.

通过显微和亚微分析揭示出辽东地区三种变形特点的角闪质岩石(片麻状斜长角闪岩、条带状斜长角闪岩和糜棱状斜长角闪岩)具有差异的显微及亚微构造。

Through geothermometry and geobarometry, the temperature and pressure conditions of the three types of amphibolites are calculated, gneissic amphibolites: 597.0℃,0.536Gpa, banded amphibolites: 597.0℃,0.536Gpa, mylonitic amphibolites: 597.0℃,0.536Gpa.

通过地质温压计计算,三种斜长角闪岩及其原岩的形成与变形温压条件具有从升温升压经降温升压到降温降压的变化规律(片麻状斜长角闪岩:597.0 ℃,0.536 Gpa;条带状斜长角闪岩:597.0 ℃,0.536 Gpa;糜棱状斜长角闪岩:597.0 ℃,0.536 Gpa)。

Through geothermometry and geobarometry, the temperature and pressure conditions of the three types of amphibolites are calculated, gneissic amphibolites: 597.0℃, 0.536 GPa, banded amphibolites: 617.3℃, 0.455 GPa, mylonitic amphibolites: 558.8℃, 0.514 GPa.

通过地质温压计计算,3种斜长角闪岩及其原岩的形成与变形温压条件具有从升温升压经降温升压到降温降压的变化规律(片麻状斜长角闪岩:597.0℃,0.536 GPa;条带状斜长角闪岩:617.3℃,0.455 GPa;糜棱状斜长角闪岩:558.8℃,0.514 GPa)。

The Paleoproterozoic Beidahe Group-complex remains as continental shivers in the interior of the North Qilian orogen. In its early stage of development, there occurred abundant amphibolite. The protolith of the amphibolite is basalts. The Alk-∑FeO-MgO plot, REE features and Rittmann index show that the protolith belongs to the calc-alkaline suite and exceptionally shows the subalkaline character. The rock is characterized by higher Al2O3 and ∑FeO and lower Mg#, indicating that it has a higher degree of compositional evolution and that the formation of volcanic rocks is related to activation of older crust. Highly fractionated REE patterns and amphibolite on the Ti-Zr-Y plot, Ni-FeO/MgO plot and Ta/Yb-Th/Yb plot all indicate the characteristics of volcanic arcs and active continental margins. On the geochemical diagram of basalt, the overall REE features are in the main analogous to those of calc-alkaline island-arc basalt, with Sr87/Sr86=0.71617–0.72033,Nd143/Nd144=0.512414–0.512495 and εNd=–2.79 to –4.37,εSr=245.78–305.3, showing that the magma was derived from the crust or subjected to contamination with the lower crust below the continent.

提要:以大陆碎块形式残存于北祁连造山带内部的古元古代北大河岩群早期发育有大量的斜长角闪岩,其原岩为玄武岩,Alk—∑FeO—MgO图解,REE特征,里特曼组合指数等均显示斜长角闪岩属钙碱性系列范围,个别显示弱碱性,斜长角闪岩具有较高的Al2O3,∑FeO和低的Mg#,这些特点反映其成分演化程度较高,表明火山岩的形成与古老地壳的活化有关,有较强分异的稀土元素分配模式,在Ti—Zr—Y图,Ni—FeO/MgO图解和Ta/Yb—Th/Yb图解上斜长角闪岩均显示火山弧或活动大陆边缘的特点,在玄武岩的地球化学形式图,稀土元素整体特征与钙碱性岛弧玄武岩基本相同;87Sr/86Sr=0.716 17~0.720 33, 143Nd/144Nd=0.512 414~0.512 495,εNd=-2.79~-4.37。

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但我们并不在乎沙场中的显露。

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