地质学报Issue(11)：2016-2024,9.
江陵凹陷始新世早期古气温：来自无水芒硝流体包裹体的证据
Paleotemperatures of Early Eocene in the Jinangling Depression:Evidence from Fluid Inclusions in Thenardite
摘要
Abstract
Shashi Formation and the lower section of Xingouzui Formation in the Jinangling Depression deposited a thick rock series of salt.The homogenization temperatures of primary fluid inclusions in thenardite from the lower section of Xingouzui Formation of Early Eocene were measured by freezing method.The samples were placed in a freezer at -18℃ for one or two weeks.This temperature was not cold enough to freeze the fluid inclusions.Once removing the sample in a Linkam THMS600 heating/freezingstage when we observed the fluid inclusions in a sample produced vapor bubbles.Then the sample was slowly heated until the bubbles disappeared.The current temperature was the homogenization temperature.Temperature results show that the homogenization temperature range is 17.6 ~38.5℃,with the average of 27.2℃. This maybe show that,the paleotemperature of lower section of Xingouzui Formation in Jinangling Depression of Early Eocene was around 27.2℃.In extreme cases,the paleotemperature can reach 38.5 ℃. By comparison with previous studies,we found a significant cooling trend from the upper section of Shashi Formation to the the lower section of Xingouzui Formation in the Jinangling Depression.However,due to PETM(Paleocene-Eocene Thermal Maximum)events,global temperatures were generally higher at that time.It can be conduded that although the lower section of the Xinggouzui Formation entered the cooling period after the PETM event,the climate was still parched.关键词
无水芒硝/原生流体包裹体/均一温度/冷冻法/古气温/始新世早期/江陵凹陷Key words
thenardite/primary fluid inclusions/homogenization temperature/the freezing method/paleotemperature/Early Eocene/Jiangling Depression引用本文复制引用
李皓楠,王春连,刘成林,杨申谷,徐海明,胡海兵,余小灿,刘锦磊..江陵凹陷始新世早期古气温：来自无水芒硝流体包裹体的证据[J].地质学报,2015,(11):2016-2024,9.基金项目
本文为国家973项目（编号2011CB403007）、国家自然科学基金青年基金（编号41502089，41202059）、中央级公益性科研院所基本科研业务费专项（编号K1415）和中国地质大调查项目（编号12120114051901）联合资助。 （）
