The hydrologic record of karst systems:Linking soil moisture to the carbon isotope signatures of soils above the Blue Spring cave system

摘要：

　　Speleothem carbonates are precipitated continuously from inorganic carbon dissolved in seepage water infiltrating from the land surface,that reflects a mixture of atmospheric CO2,respired soil carbon,and epikarst sources,each with distinct δ13C values.To aid in deconvolving these signatures,soil samples were collected above the Blue Spring cave system in Sparta,Tennessee,USA and subjected to a series of incubation experiments,in order to constrain the correlation between CO2 respiration rates and soil moisture.This relationship is used to parameterize a simple mixing model which predicts the relationship between δ13C and soil moisture in fluids infiltrating into the underlying cave system.

作者: Yuchen Liu Jessica L.Oster Jennifer L.Druhan

作者单位: Department of Geology,University of Illinois Urbana Champaign,Illinois,USA Department of Earth and Environmental Science,Vanderbilt University,Nashville,Tennessee,USA

会议类型: 国际会议

会议名称: The 11th International Symposium on Geochemistry of the Earths Surface(GES-11)(第十一届地球表层地球化学国际研讨会)

会议地点: 贵阳

会议语种:英文

页码: 1-4

在线出版日期: 2017-06-11（万方平台首次上网日期，不代表论文的发表时间）