Methane clumped isotope analysis is a tool used to constrain the formation or equilibration temperatures of methane, differentiate methane thermogenic, microbial ‘abiotic’ origins. Geothermometry applications are based on temperature dependence relative abundances multiply-substituted isotopologues in thermodynamic equilibrium, whereas assignments biogenicity ‘abiogenicity’ rely kinetic effects...

Additive partitioning of species diversity is a promising approach for analyzing patterns of diversity in mollusk communities, especially their spatial distribution. Our aims were to assess the distribution of mollusk communities in Southern Brazilian streams, and to evaluate the partitioning of community diversity at different spatial scales. The study was carried out in the lower course of th...

The distribution of oxygen isotopes between calcite and fluid inclusions has demonstrated utility for reconstructing near-surface precipitation temperatures. For that formed at depth, however, the resilience this paleothermometer to diagenetic isotope alteration is poorly constrained. Clumped also document temperatures are similarly vulnerable alteration. Post-entrapment exchange fluid-inclusio...