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...
About a dozen U–Pb zircon dates have previously been reported from the Campanian of the WIB (Supplementary TableS1) and all but two are microbeam U–Pb analyses of detrital zircons59,91. The only two published CA-ID-TIMS bentonite ages were from the lower portion of the Kaiparowits Fm. ...
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...
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...
Mainly acidic Stephanian to early Permian volcanic rocks and intercalated sediments accumulated in the Thuringian Forest Basin (TFB) in central Germany to a total thickness of ca. 2000 m. This basin offers a wide range of biostratigraphic information. New high-precision U–Pb CA–ID–TIMS (chem...
2020年的时候,我们曾经专门研究过一家加拿大国民咖啡品牌Tims进入中国,这家当时就获得腾讯加持的咖啡巨头可谓是风头无两,如今一年时间快到了,红杉、腾讯再度资本加持,获得钞能力的Tims能够进一步杨帆起航接过瑞幸的接力棒进一步冲击星巴克吗? 一、Tims再获红杉、腾讯加持 根据钛媒体的报道,2021年2月最后一个工作日,元宵...
摘要: CA-TIMS(Chemical Abrasion-Thermal Ionization MassSpectrometry)化学剥蚀热电离质谱是锆石U-Pb年代学上的重大突破,其采用对单颗粒锆石高温退火热处理和化学溶蚀清洗的前处理方法,解决铅丢失问题以重建锆石封闭系统,使得U-Pb定年精度优于0.1%,远高于SHRIMP或LA-ICPMS微区定年的1%-2%的精度,在确定...