Over the last 30 years, geochemical research has demonstrated that abiotic methane (CH4),
formed by chemical reactions which do not directly involve organic matter, occurs on Earth in …

Carbonate clumped isotope thermometry is a relatively new paleotemperature proxy based
on measurements of the degree of ordering of 13C and 18O into bonds with each other …

The clumped isotopic composition of carbonate‐derived CO2 (denoted Δ47) is a function of
carbonate formation temperature and in natural samples can act as a recorder of …

The nine editions of Stable Isotope Geochemistry have appeared over a time span of nearly
50 years. The first edition (1973) appeared as a slim book of 135 pages. Due to the rapid …

We present a revised approach for standardizing and reporting analyses of multiply
substituted isotopologues of CO2 (ie,'clumped'isotopic species, especially the mass-47 …

The early Eocene (56 to 48 million years ago) is inferred to have been the most recent time
that Earth's atmospheric CO 2 concentrations exceeded 1000 ppm. Global mean …

Clumped isotope measurements aim to quantify some statistical properties of the
isotopologue population in a given sample, which requires prior knowledge of the absolute …

The abundance of the doubly substituted CO2 isotopologue, 13C18O16O, in CO2 produced
by phosphoric acid digestion of synthetic, inorganic calcite and natural, biogenic aragonite is …

Clumped isotope geochemistry is concerned with the state of ordering of rare isotopes in
natural materials. That is, it examines the extent to which rare isotopes (D, 13C, 15N, 18O …

Methane is an important greenhouse gas and energy resource generated dominantly by
methanogens at low temperatures and through the breakdown of organic molecules at high …