CA-IDTIMS geochronologyconodontsEarly OrdovicianCanning BasinWestern AustraliaA continuously cored section of more than 300 m through the Nambeet Formation and the basal part of the conformably overlying Willara Formation in the Olympic 1 petroleum well, drilled in the Canning Basin of northern ...
超低本底单颗粒锆石ca-id-tims u-pb高精度定年方法 更新时间:2024年12月17日 综合排序 人气排序 价格 - 确定 所有地区 查看详情 ￥25.00/个 广东东莞 卡轮新款欧美嘻哈吊坠微镶锆石豹子头吊坠动物项链hiphop钛钢饰品 独立包装 广东卡轮饰品有限公司 6年 “超低本底单颗粒锆石ca-id-tim...
建立了超低本底单颗粒锆石高精度CA-ID-TIMS U-Pb分析方法. 与国内早期实验室报道的全流程Pb本底(30~50 pg)相比, 目前本工作全流程Pb本底水平已降低1个数量级以上(2~3 pg), 可以更好地满足单颗粒锆石高精度ID-TIMS U-Pb定年要求. 同时, 详细研究了Pb流程本底的来源, 并且对全流程Pb本底获得较高精度的Pb...
白垩纪是典型的温室气候时期,白垩纪的陆相沉积记录为理解陆地的地质和生态系统是如何应对过去温室气候条件下气候波动,以及预测目前正在升温的地球未来的气候波动提供了重要窗口.位于中国东北的松辽盆地保存了近乎完整的,主要为湖相的白垩纪沉积序列.在松辽盆地实施的"中国白垩纪大陆科学钻探-松科1井"项目的两口钻井—松科...
CA-ID-TIMS Zircon U–Pb geochronology Total procedural blank Common Pb Single zircon crystal 1. Introduction High-precision geochronology relies on isotope dilution thermal ionization mass spectrometry (ID-TIMS), a technique that can provide individual crystal-fragment and weighted mean isotope ratios (...
本研究获得的高精度锆石CA-ID-TIMS U-Pb年代学研究结果提示华南埃迪卡拉系-寒武系界线附近的古海洋环境研究应聚焦于留茶坡组顶部地层及其相当层位, 以确定是否存在支持Wille等(2008)提出的埃迪卡拉系-寒武系界线附近的全球海洋缺氧假说的证据. Chen X等(2015)对华南深水区留茶坡组顶部及其相当层位的地层开展了Mo同...
Zircon U-Pb CA-ID-TIMS dating of three samples of the T1 tuff bed combined give a best estimate for the deposition of the volcanic ash bed of 141.11 ± 0.25/0.26/0.30 Ma. The range of single zircon dates from ca. 143 to 141 Ma indicate that the volcanic ash was derived from a rela...
The dating of more than 100 ash-fall, tuff-bed samples using the chemical abrasion–isotope dilution thermal ionisation mass-spectrometry (CA-IDTIMS) method, together with associated palynomorph samples, have allowed a recalibration of the Guadalupian and Lopingian spore-pollen zonation of the eas...
本文对辽西建昌玲珑塔地区大西山剖面凝灰岩层进行了高精度CA-ID-TIMS锆石U-Pb年龄测定,获得了高精度年龄数据,年龄测定结果与地层层序完全一致。ID-TIMS U-Pb年龄测定结果表明大西山剖面含重要化石地层的年龄在160.89 Ma至160.25 Ma之间,属于晚侏罗纪早期牛津阶。该研究成果为目前发现的最古老带羽毛恐龙和真兽类哺乳动物...
The chronostratigraphic framework of the Sydney, Gunnedah and Bowen basins using CA-IDTIMS geochronology is enhancing correlation of stratigraphic units and providing a better understanding of local and regional sedimentation patterns. Ages range from 271.45 Ma (Rowan Formation) to 247.71 Ma (Garie For...