1) Jixian?type mid?upper Proterozoic
蓟县型中、上元古界
1.
On the Jixian?type mid?upper Proterozoic sedimentaryenvironment and the character of Inner Mongolian Axis;
关于蓟县型中、上元古界沉积环境及内蒙地轴的性质
2) Mesoproterozoic Jixianian
中元古代蓟县纪
1.
Their geologic age is Mesoproterozoic Jixianian.
本文论述了江南造山带东段浅变质岩系发现的微古植物化石(计有27属40种)和它的时代意义,分析研究了西村组优势属为 Leiominuscula,Leiofusa,Asperatopsophosphaera,Germinosphaera,Melanocyillum 等5属；昌溪组优势属为 Germinosphaera,Leiominuscula,Leiopsophosphaera,Triangumorpha,Leiofusa 等5属；厘定了西村组、昌溪组地质时代为中元古代蓟县纪,通过对比和论证,提出了伏川蛇绿岩套形成的下限地质年龄在913-963Ma,上限地质年龄在800Ma。
3) Middle-Upper Proterozoic
中、上元古界
1.
Eighty-three samples of Middle-Upper Proterozoic were collected from in North China and their carbon isotopic composition of the analyzed kerogens ranges from-35‰ to-26‰(PDB)Previous research indicated that sapropelic type kerogen was relatively rich in ~(12)C(δ~(13)C<-28‰.
华北北部中、上元古界岩样干酪根碳同位素组成在-35‰～-26‰之间,前人研究表明,腐泥型干酪根相对富集12C(δ13C小于-28‰),所以,研究区源岩干酪根类型为腐泥型和腐殖 腐泥型。
4) Neoproterozoic-Mesoproterozoic
中-上元古界
1.
Neoproterozoic-Mesoproterozoic Upwelling Lithofacies and Facies Model in North China Block
华北地块中-上元古界上升流岩相类型及相模式
5) Middle-Upper Proterozoic
中上元古界
1.
Characteristics and ore-controlling factors of uranium mineralization in Middle-Upper Proterozoic of Jiangchuan-Jianshui area
江川-建水地区中上元古界铀矿化特征及其控矿因素
6) Mesoproterozoic
[,mesəu'prɔtərə'zəuik]
中元古界
1.
Microdigital stromatolites and their response to stromatolite decline at 1250Ma± for the Mesoproterozoic Wumishan Formation at Jixian section in Tianjin;
天津蓟县中元古界雾迷山组微指状叠层石及其对1250Ma±叠层石衰减事件的响应
2.
Sedimentation and evolution of the Mesoproterozoic Kunyang Group in the Huili Huidong region, Sichuan and its adjacent areas;
四川会理-会东及邻区中元古界昆阳群沉积特征及演化
3.
Research on the Sequence Stratigraphy and Sedimentology of the Mesoproterozoic Gaoyuzhuang Formation in the Yanshan Region;
燕山中元古界高于庄组层序地层及沉积特征研究
补充资料：天津蓟县中上元古界自然保护区
位于天津市蓟县境内，面积900公顷，是中国第一个国家级地质剖面自然保护区，以岩层齐全、出露连续、保存完好、质地清楚、构造简单、变质极浅和古生物化石丰富闻名于世，并被确定为中国中上元古界的标准剖面。剖面地层总厚度达9197米，记载着距今18.5亿年至8亿年间的地质演化史，在距今14～12亿年的岩层中，发现了世界罕见的微生物群，大大提前了微生物的出现年代，具有重要的科学价值。
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