The U-Pb dating on detrital zircons is employed in this research to a better understanding of the varied provenances and the regional tectonic evolution.
闽西南晚三叠世文宾山组碎屑锆石形态学及U-Pb测年分析表明:(1)晚三叠世文宾山组物源复杂,其主要源区是闽西北隆起带;(2)闽西南晚三叠世具有大于2500 Ma的太古宙的源区,华夏古陆可能存在太古宙陆核或东南沿海还存在另一古老基底;(3)980~1190 Ma的碎屑锆石说明晚三叠世闽西南具有G renville期物质来源,它们可能来自另外一个陆块,由于印支期古特提斯洋关闭与华夏地块拼接,并为晚三叠世盆地提供物源;(4)区内印支期岩浆岩带也是晚三叠世沉积的重要物源区。
A new kind of composite beam,prestressed concrete composite beam with U-shaped precast beam,is presented and its structural characters are discussed.
提出一种新型叠合梁结构———U形预制截面预应力混凝土叠合梁,探讨了其结构特点;介绍了国内外对预应力混凝土叠合梁抗裂度的研究概况;对U形预制梁制作、运输吊装阶段和叠合梁使用阶段开裂前的截面应力应变关系分别进行分析,在此基础上推导出相应阶段的正截面抗裂验算方法。
Forming Ages of Early Precambrian Metamorphic Strata in Shandong Province--Proofs of Zircon SHRIMP U-Pb Dating
山东早前寒武纪变质地层形成年代——锆石SHRIMP U-Pb测年的证据
LA-ICP-MS zircon U-Pb dating from granite-porphyry rcoks in Xikuangbei,East Junggar,Xinjiang,China
新疆东准噶尔锡矿北花岗斑岩的锆石LA-ICP-MS U-Pb测年
A Review of In-situ U-Pb Dating Methods for the Accessory U-Bearing Minerals
含U副矿物的原位微区U-Pb定年方法
Molybdenite Re-Os and SHRIMP zircon U-Pb dating of Duobuza porphyry copper deposit in Tibet and its geological implications
西藏多不杂斑岩铜矿床辉钼矿Re-Os和锆石U-Pb SHRIMP测年及地质意义
In situ U-Pb zircon dating using laser ablation-multi ion counting-ICP-MS
LA-MC-ICP-MS锆石微区原位U-Pb定年技术
SHRIMP Zicon U-Pb Dating and Its Geological Implication for the Xiangshan Porphyric Dacite-Rhyolitic
相山流纹英安斑岩锆石SHRIMP U-Pb年龄及地质意义
Ziron U-Pb Age of Gneissic Granites in the Tengchong Block,Western Yunnan
滇西腾冲地块片麻状花岗岩的锆石U-Pb年龄
Zircon U-Pb Age of Siliceous Rock from the Central Jilin and Its Geological Significance
吉林中部硅质岩中锆石U-Pb年龄及其地质意义
Zircon U-Pb Ages, Petrogenesis and Crustal Evolution of the Granites in Northeastern Part of the Great Xing'an Range;
大兴安岭东北部花岗岩类锆石U-Pb年龄、岩石成因及地壳演化
The Chronological Study on U-Pb Dating of Modern River Detrital Zircon in North Piedmont of Qinling and Its Geological Indication;
秦岭北麓现代河流碎屑锆石U-Pb年代学研究及其地质意义
Zircon U-Pb Age and Geochemistry of the Daohugou Volcanic Rocks in Ningcheng Area, Inner Mongolia;
内蒙宁城道虎沟火山岩的U-Pb年代学及地球化学研究
Early Cretaceous Zircon SHRIMP U-Pb Age of the Trachyte and Its Significances of the Gan-Hang Belt
赣杭带早白垩世粗面岩锆石SHRIMP U-Pb年龄及其意义
Study on Intrusive Rocks Forming Period and Stages Division in Ludong Area
鲁东地区侵入岩形成时代和期次划分——锆石SHRIMP U-Pb年龄的证据
Geochemical Charactericstic and Zircon SHRIMP U-Pb Dating of Sehe Granite in Shanyang County,Shanxi Province and Its Geological Significance
山阳色河花岗岩地球化学特征和锆石SHRIMP U-Pb年代学
Zircon LA-ICP-MS U-Pb Age of the Jinping-Tongchang Porphyry Associated with Cu-Mo Mineralization and its Geological Implication
金平铜厂铜钼矿床赋矿岩体锆石LA-ICP-MS U-Pb年龄及意义
Zircon SHRIMP U-Pb dating and geological significance from granite bodies in Tangzhangzi and Niuxinshan, eastern Hebei Province, China
冀东唐杖子、牛心山花岗岩体锆石SHRIMP U-Pb定年及其地质意义
Zircon SHRIMP U-Pb dating of two linear granite plutons in southern Altay Mountains and its tectonic implications
阿尔泰山脉南部线性花岗岩锆石SHRIMP U-Pb定年及其地质意义
Zircon U-Pb Dating and Tectonic Significance of the Shipingchuan Granite in Southeastern Zhejiang Province,SE China
浙东南石平川花岗岩体LA-ICP-MS锆石U-Pb年代学及构造意义