1) Dameigou Formation
大煤沟组
1.
On the basis of integrated well data and seismic data,combined with the high resolution sequence stratigraphic data,the river-lake delta sedimentary system of the Dameigou Formation in the Yuka Coal Field in the north margin of the Qaidam Basin,was divided into short-term,middle-term and long-term base-level cycles.
利用高分辨率层序地层学理论和技术方法,综合地震、测井、岩芯和煤质资料对柴达木盆地北缘鱼卡煤田中下侏罗统大煤沟组地层河湖三角洲沉积体系进行高分辨率层序地层学分析,从中识别出短期、中期、长期3个级别的基准面旋回层序,划分出向上"变深"非对称型、向上"变浅"非对称型及对称型3种短期基准面旋回基本结构类型。
2) Dameigou section
大煤沟剖面
1.
It has been found out that the mother rocks of erosion provenance are mainly mid-low - grade metamorphic rocks, sedimentary rocks, as well as acidic and basic rocks by the heavy mineral analysis of Dameigou section in northern Caidam basin.
提出了重矿物特征指数ATi和GZi的韵律性和相关性的存在,并依此把大煤沟剖面中生代地层划分为5个重矿物韵律层,分析了它们在揭示源区岩性变化及在地层划分与对比中的作用。
3) Dabeigou Formation
大北沟组
1.
New progress in the study of conchostracon fossils from the Dabeigou Formation in the Luanping basin,northern Hebei Province of China;
冀北滦平盆地大北沟组叶肢介化石研究新进展
2.
Lithostratigraphy and biostratigraphy features of Zhangjiakou Formation and Dabeigou Formation and its significance for stratigraphic subdivision and correlation in the Northeast Asia
冀北张家口组、大北沟组的岩石地层学、生物地层学特征及其在东北亚地层划分对比中的意义
3.
Based on the regional distribution of the Dabeigou and Dadianzi formations and latest results obtained in the study of the Luanping basin,the original Dabeigou Formation is subdivided into the Dabeigou Forma-tion and Dadianzi Formation sensu stricto.
冀北滦平盆地火斗山乡张家沟大北沟组和大店子组剖面,是至今找到的出露良好、沉积连续和古生物丰富的好剖面。
4) Dashuangou Formation
大蒜沟组
1.
So, it is suitable for taking the Dashuangou Formation with this bioseries as the late Carboniferous-beginning of .
在延边开山屯地区大蒜沟组地层中,发现的植物化石大部分在吉南—辽东地区太原组中所常见,具有明显的晚石炭世华夏植物群的色彩;动物化石也大多属石炭—二叠纪常见分子。
5) Xidagou
西大沟组
1.
There are 83 genus and 110 species,including two new species,in the sporo- pollen assemblage of Xidagou Formation in North Qilian,Qinghai province.
青海北祁连区西大沟组孢粉组合含有83属110种(类型),包括2新种,其中蕨类植物孢子为33。
6) major groove
大沟
补充资料:煤的镜质组反射率
煤的镜质组反射率
reflectance of vitrinite in coal
mei de如夕hjzll fan劝el五煤的镜质组反射率(r eflectauceofvitrinite in eoal)镜质组在绿色光(几~546lun)中的反射光强相对于垂直入射光强的百分比。是煤岩学的研究内容之一口煤的镜质组反射率是表征煤化度的重要指标。各种煤若显微组分的反射率均随煤化度加深而增大,这反映了煤的内部由芳香稠环化合物组成的核的缩聚程度在增长,碳原子的密度在增大。但各煤岩显微组分的反射率随煤化度变化的速度有差别,其中以镜质组的变化快而且规律性强。镜质组是煤的主要组分,颗粒较大而表面均匀,其反射率易于测定。而且,镜质组反射率与表征煤化度的其他指标(如挥发分、碳含量)不同,它不受煤的岩相组成变化的影响,因此是公认的较理想的煤化度指标,尤其适用于烟煤阶段。中国煤的镜质组反射率与干燥无灰基挥发分(见煤的分析)
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参考词条