scholarly journals Influence of biotic vs abiotic processes on the genesis of non‐marine carbonates along the Cameroon Volcanic Line (Cameroon), and palaeofluid provenance

2021 ◽  
Author(s):  
Salomon Bertrant Bisse ◽  
Bokanda Eric Ekoko ◽  
Jacques Gerber ◽  
Emile Ekomane ◽  
Fulvio Franchi
Keyword(s):  
Cameroon Volcanic Line ◽  
Marine Carbonates

MULTIPLE, SHORT-LIVED OCEAN ANOXIC EVENTS ACROSS THE LATE DEVONIAN MASS EXTINCTION DETECTED USING URANIUM ISOTOPES OF MARINE CARBONATES

2016 ◽  
Author(s):  
David A. White ◽  
◽  
Maya Elrick ◽  
Stephen Romaniello ◽  
Feifei Zhang
Keyword(s):  
Mass Extinction ◽  
Uranium Isotopes ◽  
Late Devonian ◽  
Marine Carbonates ◽  
Anoxic Events

SIMULATING METEORIC AND MIXING-ZONE DIAGENESIS OF MARINE CARBONATES VIA A TWO-DIMENSIONAL REACTIVE TRANSPORT MODEL

2017 ◽  
Author(s):  
Mingyu Zhao ◽  
◽  
Noah J. Planavsky ◽  
Guangyi Wei ◽  
Zheng Gong
Keyword(s):  
Reactive Transport ◽  
Transport Model ◽  
Two Dimensional ◽  
Mixing Zone ◽  
Reactive Transport Model ◽  
Marine Carbonates

Fracture network mapping using remote sensing in three crater lakes environments of the Cameroon volcanic line (central Africa)

2021 ◽  
Vol 14 (6) ◽  
Author(s):  
Marthe Mbond Ariane Gweth ◽  
Jorelle Larissa Meli’i ◽  
Valentin Oyoa ◽  
Diab Ahmad Diab ◽  
Daniel Herve Gouet ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Central Africa ◽  
Fracture Network ◽  
Crater Lakes ◽  
Cameroon Volcanic Line ◽  
Network Mapping

Probabilistic seismic hazard assessment for the main cities along the continental section of the Cameroon volcanic line

2021 ◽  
Vol 14 (9) ◽  
Author(s):  
Etoundi Delair Dieudonné Ndibi ◽  
Eddy Ferdinand Mbossi ◽  
Nguet Pauline Wokwenmendam ◽  
Bekoa Ateba ◽  
Théophile Ndougsa-Mbarga
Keyword(s):  
Seismic Hazard ◽  
Hazard Assessment ◽  
Seismic Hazard Assessment ◽  
Probabilistic Seismic Hazard Assessment ◽  
Probabilistic Seismic Hazard ◽  
Cameroon Volcanic Line

scholarly journals Lithospheric mantle refertilization by DMM-derived melts beneath the Cameroon Volcanic Line—a case study of the Befang xenolith suite (Oku Volcanic Group, Cameroon)

2021 ◽  
Vol 176 (5) ◽  
Author(s):  
Sylvin S. T. Tedonkenfack ◽  
Jacek Puziewicz ◽  
Sonja Aulbach ◽  
Theodoros Ntaflos ◽  
Mary-Alix Kaczmarek ◽  
...  
Keyword(s):  
Lithospheric Mantle ◽  
Size Variation ◽  
African Plate ◽  
Cameroon Volcanic Line ◽  
Origin And Evolution ◽  
Volcanic Group ◽  
Cenozoic Volcanism ◽  
Composition Of Minerals ◽  
Ree Patterns

AbstractThe origin and evolution of subcontinental lithospheric mantle (SCLM) are important issues of Earth’s chemical and physical evolution. Here, we report detailed textural and chemical analyses on a mantle xenolith suite from Befang (Oku Volcanic Group, Cameroon Volcanic Line), which represents a major tectono-magmatic structure of the African plate. The samples are sourced from spinel-facies mantle and are dominated by lherzolites. Their texture is cataclastic to porphyroclastic, and foliation defined by grain-size variation and alignment of spinel occurs in part of peridotites. Spinel is interstitial and has amoeboidal shape. Clinopyroxene REE patterns are similar to those of Depleted MORB Mantle (DMM) except LREEs, which vary from depleted to enriched. The A-type olivine fabric occurs in the subset of one harzburgite and 7 lherzolites studied by EBSD. Orthopyroxene shows deformation consistent with olivine. The fabric of LREE-enriched clinopyroxene is equivalent to those of orthopyroxene and olivine, whereas spinel and LREE-depleted clinopyroxene are oriented independently of host rock fabric. The textural, chemical and thermobarometric constraints indicate that the Befang mantle section was refertilised by MORB-like melt at pressures of 1.0–1.4 GPa and temperatures slightly above 1200–1275 °C. The olivine-orthopyroxene framework and LREE-enriched clinopyroxene preserve the protolith fabric. In contrast, the LREE-depleted clinopyroxene, showing discordant deformation relative to the olivine-orthopyroxene protolith framework, and amoeboidal spinel crystallized from the infiltrating melt. The major element and REEs composition of minerals forming the Befang peridotites indicate subsequent reequilibration at temperatures 930–1000 °C. This was followed by the formation of websterite veins in the lithospheric mantle, which can be linked to Cenozoic volcanism in the Cameroon Volcanic Line that also brought the xenoliths to the surface. This study therefore supports the origin of fertile SCLM via refertilization rather than by extraction of small melt fractions, and further emphasizes the involvement of depleted melts in this process.

Architecture and chemostratigraphy of Late Jurassic shallow marine carbonates in NE Japan, western Paleo-Pacific

2009 ◽  
Vol 214 (1-4) ◽  
pp. 49-61 ◽  
Author(s):  
Yoshihiro Kakizaki ◽  
Akihiro Kano
Keyword(s):  
Late Jurassic ◽  
Shallow Marine ◽  
Marine Carbonates ◽  
Ne Japan

Pyroxenite in the mantle source of basanites at the Youkou maar, Adamawa Volcanic Massif (Cameroon Volcanic Line, West Africa)

2021 ◽  
Vol 583 ◽  
pp. 120478
Author(s):  
Patrick Merlin Wagsong Njombie ◽  
Robert Temdjim ◽  
Nicaise Blaise Ngongang Tchuimegnie ◽  
Stephen F. Foley ◽  
François Xavier Onana Mebara
Keyword(s):  
West Africa ◽  
Mantle Source ◽  
Cameroon Volcanic Line

Measurements of low-level radon for the determination of radium in marine carbonates

1973 ◽  
Vol 7 (2) ◽  
pp. 81-88 ◽  
Author(s):  
Masayasu Noguchi ◽  
Hiroshi Wakita
Keyword(s):  
Low Level ◽  
Marine Carbonates
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