Results 241 to 250 of about 299,036 (394)

Biogeochemical characterization of micritized carbonate grains in the shallow‐marine Al‐Kharrar Lagoon (Red Sea, Saudi Arabia)

open access: yesSedimentology, EarlyView.
ABSTRACT Micritization of marine carbonate grains is an early diagenetic process involving the alteration of the original carbonate fabric and the formation of cryptocrystalline textures through cycles of dissolution and reprecipitation. Microorganisms play a significant role in this process, actively contributing to the formation of constructive and ...
Camila Areias   +8 more
wiley   +1 more source

Zeolite Facies Metamorphism, Geochemistry and Some Aspects of Trace Element Redistribution in Altered Basalts of DSDP, Leg 37

open access: bronze, 1977
A. J. Andrews   +6 more
openalex   +1 more source

The Chamrousse Ophiolite (Western Alps, France): Relict of a Devono‐Carboniferous Ocean

open access: yesTerra Nova, EarlyView.
ABSTRACT The Chamrousse ophiolite (Western Alps, France) is one of the best‐preserved Variscan relicts of Cambro‐Ordovician oceanisation within the northern Gondwana margin. This study presents new in situ U–Pb isotope analyses on zircon grains from that ophiolite, revealing that the oceanic stage in Chamrousse has occurred 150 Ma later than estimated.
Maureen Gunia   +6 more
wiley   +1 more source

Schist Belts of the Benin‐Nigeria Shield Reveal a Neoproterozoic History

open access: yesTerra Nova, EarlyView.
ABSTRACT Belts of metasedimentary rocks (schist belts) in the Benin‐Nigeria Shield (BNS) are investigated for the first time using U–Pb dating and Lu‐Hf isotope analysis of detrital zircons. We report maximum depositional ages that place their deposition firmly in the Neoproterozoic and link them with strata in the Dahomey Belt, the central African ...
Axel Hofmann   +6 more
wiley   +1 more source

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