6533b7d7fe1ef96bd126905b

RESEARCH PRODUCT

Biogeochemical Cycle of Silica in an Apolyhaline Interdunal Holocene Lake (Chad, N'Guigmi Region, Niger)

David SebagAlain DurandEric P. Verrecchia

subject

chemistry.chemical_classificationBiogeochemical cycleEcologyEphemeral keyGeochemistrySodium silicateGeneral MedicineDiagenesischemistry.chemical_compoundchemistryOrganic matterPrecipitationLithificationEcology Evolution Behavior and SystematicsHoloceneGeology

description

During the Holocene, the apolyhaline conditions in interdunal ephemeral lakes in the Lake Chad region led to various diagenetic processes, which resulted in: (a) clay authigenesis, (b) organic matter lithification (plants and cyanobacterial mats), (c) precipitation of sodium silicate (magadiite, kenyaite, zeolite), and (d) chert neoformation. Each step in this diagenetic process involves silica, which can be highly mobile under such conditions. Therefore, the paleoenvironmental variations can be investigated using the Si cycle.http://link.springer. de/link/service/journals/00114/bibs/9086010/90860475.htm</HEA

yearjournalcountryeditionlanguage
1999-10-01Naturwissenschaften
https://doi.org/10.1007/s001140050657