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Introduction to geochemistry of metalliferous black shales [PDF]
Chemical Geology, 1992 1. Metalliferous black shales Metalliferous black shales exhibit a wide range of physical and chemical characteristics. They can be enriched in many different metals, and the metals can be in a variety of geochemical states. Depositional and geological histories of these shales are diverse.
Meyers, Philip A. +2 more
openaire +3 more sources
Geobiology, Volume 21, Issue 1, Page 28-43, January 2023., 2023 Abstract Manganese (Mn) oxidation in marine environments requires oxygen (O2) or other reactive oxygen species in the water column, and widespread Mn oxide deposition in ancient sedimentary rocks has long been used as a proxy for oxidation. The oxygenation of Earth's atmosphere and oceans across the Archean‐Proterozoic boundary are associated with ...
Sam C. Spinks +7 more
wiley +1 more source
Cadmium sulfide in a Mesoproterozoic terrestrial environment [PDF]
, 2014 Peer ...
Bowden, S. +4 more
core +1 more source
A review of microbial‐environmental interactions recorded in Proterozoic carbonate‐hosted chert
Geobiology, Volume 21, Issue 1, Page 3-27, January 2023., 2023 Abstract The record of life during the Proterozoic is preserved by several different lithologies, but two in particular are linked both spatially and temporally: chert and carbonate. These lithologies capture a snapshot of dominantly peritidal environments during the Proterozoic. Early diagenetic chert preserves some of the most exceptional Proterozoic
Kelsey R. Moore +5 more
wiley +1 more source
Influence of liquid-nitrogen freezing of gas-bearing shale rocks on their compressive strength [PDF]
, 2018 Any definable relation between falling temperature and the compressive strength of shale rocks should provide a useful predictive tool aiding optimization of the results of hydraulic fracturing.
Jarosz, Kinga
core +1 more source
Lethaia, EarlyView., 2021 Biomineralization is a generic term used to indicate biological‐mediated mineral formation. In carbonate mineralization, nucleation of crystals can be: (1) controlled directly by the organisms, like in the skeletal formation of most metazoans; (2) induced by microbial communities, by indirect precipitation mediated by their metabolic activities; or (3)
Adriano Guido +4 more
wiley +1 more source
Chemical Engineering Transactions, 2017 The Middle Ordovician Yanxi Formation (O2y) in the central area of Hunan province with a set of organic-rich marine shales is having great potential for prospecting of shale gas.
Jie Li +3 more
doaj +1 more source
A black shale protolith for gold-tellurium mineralisation in the Dalradian Supergroup (Neoproterozoic) of Britain and Ireland [PDF]
, 2017 The Dalradian Supergroup of Britain and Ireland is mineralised by gold-tellurium vein deposits. The host succession includes carbonaceous, pyritic shales (pelites) which were a source of trace elements, including gold and tellurium.
Armstrong, J. +5 more
core +1 more source
Deformation in Moffat Shale detachment zones in the western part of the Scottish Southern Uplands [PDF]
, 2004 A study of the décollement zones in the Moffat Shale Group in the Ordovician Northern Belt of the Southern Uplands of Scotland reveals a progressive sequence of deformation and increased channelization of fluid flow.
Needham, D.T.
core +1 more source
American Journal of Science, 2018 The early Paleoproterozoic witnessed Earth's first major oxygenation, referred to as the Great Oxidation Event or GOE. The GOE began around 2.45 billion years ago (Ga) and progressed over hundreds of millions of years, as evidenced by multiple redox ...
D. Asael +4 more
semanticscholar +1 more source