Ivo Karmann

• Abstract

  This proposal aims the geochronology and stratigraphy of detritic sediments from caves of the São Desidério municipality, west of Bahia state, in order to get burial ages from quartz grains using cosmogenic nuclide dating techniques. The ages of burial and erosional phases of clastic sediments, registered inside the João Rodrigues and Sopradeira - Manoel Lopes cave systems, in the São Des…

  Geochronoloy of sedimentary deposits in caves from São Desiderio region: implications for speleogenesis and geomorphological evolution of West Bahia State, AP.R

• Abstract

  AbstractThis research proposal has the main goal of monitoring the modern geochemical and stable isotope dynamics of oxygen and carbon of vadose percolation in karst systems where well dated stalagmites has been obtained, in order to increase the confidence of paleoclimatic interpretations of speleothem records deposited in tropical to subtropical environments. Parameters as pluviosity, o…

  Geochemistry of vadose percolation in karst systems: implications for paleoclimatic interpretations os speleothem records, AP.R

• Abstract

  The research proposed aims to set up a monitoring program for environmental parameters such as climate, hydrology and chemistry-isotopic composition of meteoric waters at cave sites in order to improve the confidence in the paleoclimatic and paleoenvironmental interpretations records from speleothem records. The study sites were previously selected based on the availability of well-dated …

  A calibration study in Central Brazil caves: implications for the paleoclimate inferences from speleothem records, AP.R

(Only some records are available in English at this moment)

• Abstract

  This research proposal aims to investigate the paleoclimate changes occurred in the last 5500 years during the Holocene in the states of Bahia and São Paulo. The study is based on high-resolution records of oxygen and carbon isotope ratios from speleothems, and also includes measurements of layer thickness and frequency within the same samples, which can be precisely dated by U/Th method.…

  Reconstruction paleoclimate of Holocene across of isotopic rezones of oxygen and carbon in speleothems of Bahia and São Paulo., BP.MS