对它的研究，有助于恢复大型褶皱形态和变质岩原岩产状。
Research on hook folds is conducive to restoration of folded form of large folds and original occurrence of metamorphic rocks.
不过，变质岩中微量碳酸盐的碳含量和碳同位素比值分析能够对原岩类型提供有效的判别。
Nevertheless, the combined carbon content and isotope analyses of micro-carbonate in metamorphic rocks can be used to make a distinction in origin between sedimentary and igneous protoliths.
除了变质程度以外，原岩的类型和碳的原始物质的种类也会影响碳的石墨化作用。
Besides metamorphic grade, the nature of original rocks and the precursor of carbonaceous material may also influence graphitization.
接触变质过程流体成分有较大差异，主要取决于流体来源、原岩性质和侵入体特征。
Fluid compositions very in different contact metamorphic processes depending on the fluid source, the features of sedimentary rocks and intrusive rocks.
原岩恢复以及对变质作用过程中可能发生的变质反应的理论探讨和原始沉积物理想组分计算的结果都支持上述结论。
Protolith restoration, theoretical analysis for the reactions involved in the process of metamorphism, and calculations all support the above conclusion.
因此，可以推测南苏鲁造山带核部的超高压变质岩原岩为形成在大陆板内环境的沉积岩-酸性和基性火山岩-花岗岩和奥长花岗岩建造。
Therefore, the protoliths of the UHPM rocks from the southern Sulu orogenic belt were sedimentary rocks, mafic and acidic volcanic rock, granite and trondhjemite formation with continental affinity.
研究表明，变质上壳岩原岩主要以钙碱性火山（熔）岩为主。
Study has shown that the primary rocks of metamorphic supercrustal rocks are mainly calc-alkaline volcanic rocks.
川西高原广泛分布的西康群，原视为区域低温动力变质作用低绿片岩相变质岩。
Xikang Group is widely exposed on the West Sichuan Plateau and was considered to be a low greenschist facies metamorphic rock due to regional low-temperature dynamometamorphism.
绝大多数变质岩曾遭受过剧烈的变化和变形，任何在原岩中保存的化石将因这种后来的变化和变形而无法辨认。
Most metamorphic rocks have been greatly changed and deformed that any fossils preserved In the origInal rocks will not be recognizable.
石英硬玉岩原岩包括正变质的花岗岩和奥长花岗岩、副变质的酸性火山碎屑岩和长石石英砂岩。
The protoliths of quartz jadeitite include metamorphosed granite, trondhjemite, acidic volcanic rocks and feldspar-quartz sandstone.
长石石英云母片岩、石英岩和大理岩的原岩为沉积岩，与副变质的长英质片麻岩和基性火山岩—起构成了古老的表壳岩组合。
The quartz-mica schist, quartzite and marble were metamorphosed sedimentary rocks, and, together with paragneiss and mafic rock, constituted the old supracrustal series.
并证实其原岩是与本区未变质的火山岩类相同的一套细碧-石英角斑岩系。
We con-firm that the original rocks are identical with the volcanic rocks in this area.
东秦岭商丹断裂带南侧的“武关岩群”是从原泥盆系刘岭群北侧解体出来的变质沉积—火山岩系。
The "Wuguan Group Complex" is a metamorphosed sedimentary volcanic series disintegrated from the north part of the original Devonian Liuling Group.
东秦岭商丹断裂带南侧的“武关岩群”是从原泥盆系刘岭群北侧解体出来的变质沉积—火山岩系。
The "Wuguan Group Complex" is a metamorphosed sedimentary volcanic series disintegrated from the north part of the original Devonian Liuling Group.
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