变质

Epidotes are extensively seen in various metamorphic rocks of the BikouGroup, especially in such metabasites as greenschist and blueschist.

绿帘石广泛分布于碧口群的各类变质岩石中，但以变质基性岩为主。

High oxygen isotope temperatures of 650 to 695℃ were obtained when pairing quartz with such resistant minerals as garnet, zircon and kyanite, suggesting that the refractory minerals have preserved their oxygen isotope compositions acquired during eclogitization and only suffered much weaker retrograde metamorphism than the other minerals in the eclogite.

石英-耐熔矿物对氧同位素温度主要集中在650～695℃之间，表明耐熔矿物石榴石、锆石和蓝晶石在该区榴辉岩中相对其它矿物来说保存最好，退变质作用最弱，因此其氧同位素温度与峰期超高压榴辉岩相变质奈件基本一致。

Magnetic sus- ceptibility of these formations was obviously lower than the Archean high-graded metamorphic crystalline basements, while the responding ductile shear zones created enhanced anisotropy magnetic susceptibility attributed to their penetrative mineral lineations, both of them contributed to the crustal scale NEE-NNE striking linear aeromagnetic anomalies.

不同规模的古元古代活动带彼此并不相连，以发育变质沉积-火山岩建造为主体，岩石磁化率明显低于太古宙高级变质结晶基底，与之相关的韧性剪切带则以其透入性矿物线理产生了增强的磁化率各向异性，两者共同构建了地壳尺度北东东-北北东向线性航磁异常带。

Plate tectonics; ocean ridge; magmatism; ocean crust; lithosphere; Benioff Zone; Precambrian; seafloor magnetic lineations; mantle; basalt; transform fault; metamorphism; metamorphic facies; Strontium isotope; sulphide ore

关键词：板块构造；洋脊；岩浆作用；洋底壳；岩石圈；贝尼奥夫带；前寒武纪；海底磁性线壮构造；地幔；玄武岩；转换断层；变质作用；变质相；锶同位素；硫化矿

Experimental results show that within certain ranges of concentration both Mg and mischmetal have proper modificating effect on the eutectic structure when added separately.

结果表明，在一定含量范围内，单独加镁或稀土，对共晶硅都有一定的变质作用，当镁与稀土按一定配比同时加入时，其变质能力急剧增强。

These results not only confirm that NAMs are important carrier of water involving in the deep continent subduction, but also reveal the potential of implications of NAMs for dynamics of continental subduction and exhumation.

通过本项目的执行，不仅确切地显示了名义上无水矿物是变质过程中重要的流体载体；而且表明，通过研究它们的水含量和同位素组成在不同尺度和变质阶段的分布特征，可以对板块俯冲－折返的动力学过程提供有效的制约。

The study of the mineralization degree ,water type and ion combination coefficient of the Pre-Tertiary formation water in Chaluhe fault depression,Yitong Basin,reveals that total mineralization degree of the water is relatively low,and NaHCO3 water type,while the formation water has obvious vertical mineralization zonation with a high metamorphic grade.

对伊通盆地岔路河断陷古近系地层水的矿化度、水型及变质系数、脱硫系数的研究表明，该区地层水总体为NaHCO3型水；总矿化度偏低；平面上，孤店斜坡的油气保存条件最差，梁家构造带最好，垂向上，具明显的垂向分带性，万昌组保存条件最差；变质程度高。

These elements would beenriched in hot water deposit and normal marine deposit, forming preliminary source bed or ore bed.

确认该矿床属以沉积变质作用为主，又迭加了变质热液的多种成因为特征的层控矿床。

Nationwide sampling program is designed according to the resources distribution and coal-forming periods as well as coal rank and yield of coal in China, 305 coal samples were collected and determined by catalytic spectrophotometry combined with pyrohydrolysis.The geochemical mechanism of the concentration or depletion of iodine was discussed during the process of coalification,which including peat diagenesis and coal metamorphism.The contents of iodine in Chinese coals fall in the range of 0.04-39.51 mg/kg.

根据中国煤炭资源分布和成煤时代，兼顾煤的变质程度和煤炭产量分布，在全国范围内采集了305个煤样，采用高温热水解—催化分光光度法分析了煤中碘的含量，探讨了煤化作用(包括泥炭成岩作用和煤变质作用)过程中煤中碘富集或亏损的地球化学机制。

By using the results from systemical petrography, X-ray powder diffraction, and EPMA analyses on the run products from experimental simulaion under constant temperature and pressure, we have explored the paragenesis for the pelites suffering metamorphic dehydration under high pressure condition, the process and mechanism for these metamorphic dehydration, and the relation between the components for garnets, one of the major phases in the paragenesis, and the experimental conditions including pressure, temperature, and chemical compositon in a system.

由恒温、恒压实验产物系统的岩相学、X射线粉晶衍射和电子探针分析，揭示了天然泥质岩发生高压变质脱水作用后的矿物相组合，确定了泥质岩高压变质脱水作用的过程和机理，以及主要矿物相石榴子石的组成与压力、温度和体系化学组成的关系。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。