Gas Hydrate Indications on the Southwest African Continental Margin

Zvi Ben-Avraham*, Moshe Reshef, Uri Schattner

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review


A widespread occurrence of bottom-simulating reflectors has been detected in multichannel seismic profiles on the upper continental slope in the southern periphery of the Orange River delta, probably indicating the presence of large quantities of gas hydrates along the Atlantic margin of South Africa. A cluster of mud volcanos trending in a N-to-N/NW direction intersects the shallowest part of the BSR and associated gas hydrate zone. This article presents an overview of the spatial distribution between these two features and discusses their possible relationship to subsurface faulting. While gas from this area has not yet been sampled or analyzed, we suggest that gas hydrates in this region may consist of a mixture of microbial and thermogenic gas, as much of the gas flowing through the mud volcanoes has probably originated from deep-seated Aptian source shales.

Original languageEnglish
Title of host publicationWorld Atlas of Submarine Gas Hydrates in Continental Margins
PublisherSpringer International Publishing
Number of pages6
ISBN (Electronic)9783030811860
ISBN (Print)9783030811853
StatePublished - 1 Jan 2022


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