The Lowest Boundary Age of Travertine in Dawanzhangjia Ravine, Huanglong, China  

作　　者：WANG Fudong DONG Faqin ZHAO Xueqin ZHANG Haiwei SUN Shiyong DAI Qunwei LI Qiongfang LI Gang MA Pengcheng 

机构地区：[1]Department of Geological Engineering, School of Environment and Resource, Southwest University of Science and Technology [2]Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education [3]Institute of Global Environmental Change, Xi'an Jiaotong University

出　　处：《Acta Geologica Sinica(English Edition)》2018年第2期879-880,共2页地质学报（英文版）

基　　金：supported by National Natural Science Foundation of China (grants No. 41572035, 41472309, 41603041 and 41741026);the Open Funds of State Key Laboratory of Loess and Quaternary Geology (grant No. SKLLQG1620)

摘　　要：Objective One of major challenges in paleoenvironmental reconstruction using travertine in the Huanglong area is whether one can accurately determinate the age of travertine through high-precision and high-resolution dating techniques. Previous works of 14C or ESR chronology, however, have shown that the variation of deposition ages of travertine was displayed inconsistent with each other even conflict. For instance, （1） The oldest travertine age （80 ka） located in the middle of this travertine succession is departure from sequential deposition; （2） Top or boundary ages in this sedimentary section, even with the same dating method （14C）, are three times errors, moreover, the age of the depositional sequence is not continuous. We report here the U230Th ages in lowest boundary of travertine in Dawanzhangjia Valley, Huanglong, China, to discuss the effectiveness of U-series dating for cold-water travertine and the significance of age for vicissitude of paleoenvironment.Objective One of major challenges in paleoenvironmental reconstruction using travertine in the Huanglong area is whether one can accurately determinate the age of travertine through high-precision and high-resolution dating techniques. Previous works of 14C or ESR chronology, however, have shown that the variation of deposition ages of travertine was displayed inconsistent with each other even conflict. For instance, （1） The oldest travertine age （80 ka） located in the middle of this travertine succession is departure from sequential deposition; （2） Top or boundary ages in this sedimentary section, even with the same dating method （14C）, are three times errors, moreover, the age of the depositional sequence is not continuous. We report here the U230Th ages in lowest boundary of travertine in Dawanzhangjia Valley, Huanglong, China, to discuss the effectiveness of U-series dating for cold-water travertine and the significance of age for vicissitude of paleoenvironment.

关 键 词：The Lowest Boundary Age of Travertine in Dawanzhangjia Ravine China Huanglong 

分 类 号：P512.2[天文地球—地质学] P597.3