Although marine productivity is a key parameter in the global carbon cycle, reliable
estimation of productivity in ancient marine systems has proven difficult. In this study, we …

Reduction–oxidation (redox) reactions occur during burial because sediments contain
reactive mixtures of oxidised and reduced components. Diagenetic chemical reactions …

Sulfur compounds have significant geochemical information, and the removal of sulfur from
petroleum products is one of the most important tasks in petroleum refining. However, it is a …

In environmental magnetism, rock and mineral magnetic techniques are used to investigate
the formation, transportation, deposition, and postdepositional alterations of magnetic …

Abstract Lower to Middle Eocene organic-rich deep-water limestones of the∼ 335-m-thick
(1100 ft) Radwany (Thebes-equivalent) Formation represent a source rock and a potential …

Oceanic anoxia—including euxinic settings defined by the presence of water column
hydrogen sulfide (H2S)—is minor in the ocean today. Such conditions, however, were …

Iron formations (IF) represent an iron-rich rock type that typifies many Archaean and
Proterozoic supracrustal successions and are chemical archives of Precambrian seawater …

Eight geochemical indices used for the interpretation of bottom water palaeo-oxygen
concentrations for argillaceous sedimentary rocks have been calculated for a suite of Upper …

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 …

For the past 3.8 billion years, the geochemistry of the Earth's surface-its atmosphere, waters
and exposed crust-has been determined by the presence of biota. Photosynthetic organisms …