【摘 要】
：
δ13C of dolostones from the Wumishan Formation (1 310-1 207 Ma) in the Ming Tombs area near Beijing ranges from - 1.5 to 1.5‰ (PDB), and generally, the δ18O
【出 处】
：
Chinese Science Bulletin
论文部分内容阅读
δ13C of dolostones from the Wumishan Formation (1 310-1 207 Ma) in the Ming Tombs area near Beijing ranges from - 1.5 to 1.5‰ (PDB), and generally, the δ18O ranges from - 4 to - 5‰ (PDB). The secular variation of stable carbon isotopic compositions is cyclic. δ13C displays positive shifts from a sequence boundary to 1.5 per mil (PDB), then a
δ13C of dolostones from the Wumishan Formation (1 310-1 207 Ma) in the Ming Tombs area near Beijing ranges from - 1.5 to 1.5 ‰ (PDB), and generally, the δ18O ranges from -4 to -5 ‰ (PDB). The secular variation of stable carbon isotopic compositions is cyclic. Δ13C displays positive shifts from a sequence boundary to 1.5 per mil (PDB), then a
其他文献
请下载后查看，本文暂不支持在线获取查看简介。
Please download to view, this article does not support online access to view profile.
Based on the crystal structure refinement, the arrangement and characteristics of the double tetrahedra of Si-O backbone of suolunite have been precisely clari
为了搞清独联体国家(不包括中亚)现代冲积层的总体砂矿地球化学本底,对36条河的沉积物重粒级做了125个半定量光谱分析。分析工作是在三个实验室进行的;乌拉尔中心实验空、自
随着经济的快速发展中,人们在社会生活中越来越离不开计算机的身影了。在这种情况下计算机技术已经成为促进经济发展的又一大支柱。所以这也对计算机应用基础提出更为严格的
山东省济宁市市中区以林业重点工程建设为抓手,以发展现代林业为目标,全力搞好植树造林,生态建设取得明显成效。重点突出,全面推进。以长江防护林二期工程、森林植被
Jining
1.京津唐及晋冀蒙交界区;2.苏、鲁交界和苏鲁皖浙江地区;3.川西-滇东一带;4.滇西南和滇西北地区;5.祁连山地区;6.辽东半岛、辽西及辽蒙交界地区;7.甘东南至甘青川交界地区;8
“Low-temperature Geochemistry” was prepared as a contribution to the 30th International Geological Cougress (Beijing, 4—14 August, 1996), by Academician TU
根据中国地震局文件精神，今年第十七届全国青少年地震科普夏令营分别在昆明和井岗山举行。参加夏令营的营队有北京、福建、广州、内蒙、江苏等１５个省市、自治区，约３００人。新疆地震学
近几年来,黔南州林产工业战线贯彻“横向抓项目壮集群,纵向抓产业扩规模,两头抓龙头带基地”的战略思路,共发展木材经营加工企业636户,各项工作取得了良好的成效,基本形成了
自从2008年国家决定全面铺开集体林权制度改革,改革便如疾风骤雨般深入到全国每个山谷山沟。如今3年已过,改革的进展和成果都明显高于预期,林改工作已经走进了更深的层次,改