2) very low-grade metamorphism
极低级变质作用
1.
This paper overviewed the recent progress of the studies on very low-grade metamorphism and presented a new frame for the division of diagenetic-very low grade metamorphic-low grade metamorphic zones based on a quantity of data.
介于成岩作用与低级变质作用之间的极低级变质作用是一个重要过程 ,对于全面认识地球浅层动力学与成矿作用有重要意义。
2.
The major progresses of very low-grade metamorphism are as follows: very low-grade metamorphic belts have been subdivided into Early diagenetic zone, Late diagenetic zone, Low anchizone, High anchizone, Epizone through integrally using of XRD and TEM techniques.
近年来国际上极低级变质作用的研究进展包括综合运用了伊利石结晶度等各项指标 ,将极低级变质带划分为成岩带、近变质带和浅变质带 ,成岩带和近变质带又可进一步划分为低级成岩带、高级成岩带、低级近变质带和高级近变质带 ;研究了伸展背景、阿尔卑斯碰撞背景和增生背景下的极低级变质作用 ;进一步理解了矿物的转变过程 ,建立了变质泥质岩石的矿物反应系列。
3) very low grade metamorphism
极低级变质作用
1.
Regional geological research and analysis of illite crystallinity,b 0 parameters indicated that Triassic Xikang Group underwent a regional very low grade metamorphism in Tangtang area, northwest Sichuan.
通过区域地质调查和伊利石的结晶度指数、晶格参数 (b0 )的测定 ,揭示川西北壤塘地区三叠纪西康群遭受了区域极低级变质作用 ,进一步讨论区域极低级变质作用与构造变形的关系 ,并指出区域极低级变质作用是成岩 -埋藏变质作用 (造山前 )和同造山变质作用的综合结果。
2.
Organic matters maybe come into use as the sensitive temperature pressure meter for reconstructing of orogenic process, especially at the stage of very low grade metamorphism.
在此基础上 ,讨论了利用有机质演化特征研究造山带的有关问题 ,如重塑造山过程 ,造山带空间特征以及造山带变形标志等 ;认为造山带中的沉积有机质演化特征记录了温度、围压、应力和应变等地质环境方面的丰富信息 ,从而有可能成为重建造山过程 ,尤其是极低级变质作用阶段的敏感地质温压计 。
3.
Mesozoic sedimentary mudrocks in the Youjiang River Basin have undergone regional high strain deformation and very low grade metamorphism (illite crystallinity indices are 0 331° 0 265°△2θ corresponding to the anchizone).
右江中生代三叠系槽盆相浊流沉积岩系遭受了区域强烈变形和极低级变质作用，伊利石结晶度指数为０。
4) very low-grade metamorphic belt
极低级变质带
1.
The major progresses of very low-grade metamorphism are as follows: very low-grade metamorphic belts have been subdivided into Early diagenetic zone, Late diagenetic zone, Low anchizone, High anchizone, Epizone through integrally using of XRD and TEM techniques.
近年来国际上极低级变质作用的研究进展包括综合运用了伊利石结晶度等各项指标 ,将极低级变质带划分为成岩带、近变质带和浅变质带 ,成岩带和近变质带又可进一步划分为低级成岩带、高级成岩带、低级近变质带和高级近变质带 ;研究了伸展背景、阿尔卑斯碰撞背景和增生背景下的极低级变质作用 ;进一步理解了矿物的转变过程 ,建立了变质泥质岩石的矿物反应系列。
5) low-grade epimetamorphic rock
极低级浅变质岩
1.
By taking pyrolysis experiments and analyzing composition and carbon isotopes of pyrolysis products,the hydrocarbon generation potential and products of very low-grade epimetamorphic rocks were studied.
以松辽盆地为例,通过热模拟实验及热模拟产物组分和稳定碳同位素分析,对极低级浅变质岩(泥板岩)的生烃能力及产物进行研究。
6) low and very low metamorphism
低级、极低级变质作用
补充资料：“质子-电子偶极-偶极”质子弛豫增强
“质子-电子偶极-偶极”质子弛豫增强
物理学术语。原子核外层中不成对的电子质量小，但磁动性很强，可使局部磁场波动增强，促使氢质子弛豫加快，从而使T1和T2缩短，这种效应即为PEDDPRE。过渡元素和镧系元素大部分在d和f轨道有多个不成对电子，所以其离子往往具有PEDDPRE，可用来作顺磁性对比剂，如钆(Gd)。Gd在外层有7个不成对电子，具有很强的顺磁性。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条