岩矿测试2017，Vol.36Issue(3)：289-296,8.DOI:10.15898/j.cnki.11-2131/td.201607200103
基于微量元素比值分析方法研究川东南地区小河坝组沉积环境和古气候环境
Research on the Sedimentary and Paleoclimate Environment of the Xiaoheba Formation in Southeastern Sichuan Based on the Trace Elements Ratio Method
摘要
Abstract
Lower Silurian sandstone of the Xiaoheba formation in Southeastern Sichuan has a good reservoir seal combination,and an oil and gas geological condition,but the hypothesis that the sedimentary environment belongs to continental or marine sedimentary deltas remains a matter of debate.In order to solve this problem,74 samples were collected from 9 typical sections.The elemental composition was determined by the trace element ratio method.Combined with the tectonic background and source characteristics,the sedimentary and paleoclimatic environment were discussed.X-ray Fluorescence Spectrometry (XRF) was used to analyze Ba,Mn,Sr,Cu and other trace elements,which are useful in discriminating between the sea and land facies sedimentary environment.The results show that the average Sr/Ba value is 0.2790 with the maximum of 2.31,the Mn/Fe value is 0.0093 to 0.0778,and the Sr/Ca value is 0.0005 to O.0414,typical of freshwater delta sedimentary characteristics.The average Sr/Ba is less than 1,the average Sr/Cu is 4.8758,and more than 8.1％ samples have Sr/Cu values greater than 10,reflecting the warm,moist,ancient climate environment.关键词
微量元素/小河坝组/沉积环境/古气候/X射线荧光光谱法Key words
trace elements/Xiaoheba Formation/sedimentary environment/paleoclimate/X-ray Fluorescence Spectrometry分类
化学化工引用本文复制引用
杨海欧,王长城,李文杰,董华,龚晓星..基于微量元素比值分析方法研究川东南地区小河坝组沉积环境和古气候环境[J].岩矿测试,2017,36(3):289-296,8.基金项目
国家自然科学基金资助项目(41204091) （41204091）
