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Balchit Obsidian (Upper Awash, Ethiopia)

hal.structure.identifierDe la Préhistoire à l'Actuel : Culture, Environnement et Anthropologie [PACEA]
dc.contributor.authorRAYNAL, Jean-Paul
hal.structure.identifierInstitut de Recherches sur les Archéomatériaux [IRAMAT]
dc.contributor.authorPOUPEAU, Gérard
hal.structure.identifierLaboratoire de Géographie Physique et Environnementale [GEOLAB]
dc.contributor.authorKIEFFER, Guy
hal.structure.identifierDipartimento di Scienze Storiche, Archeologiche e Antropologiche dell'Antichità
dc.contributor.authorPIPERNO, Marcello
hal.structure.identifierOcean and Earth Science [Southampton]
dc.contributor.authorANDY MILTON, J.
hal.structure.identifierInstitut de Recherches sur les Archéomatériaux [IRAMAT]
dc.contributor.authorDELERUE, Sarah
hal.structure.identifierInstitut de Recherches sur les Archéomatériaux [IRAMAT]
dc.contributor.authorLE BOURDONNEC, François-Xavier
dc.date.accessioned2023-06-28T08:41:42Z
dc.date.available2023-06-28T08:41:42Z
dc.date.issued2005
dc.date.conference2005
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/183046
dc.description.abstractEnThe small volcanic massif of Balchit is one of the Pliocene silicic centers of the Wechecha Formation (Addis Ababa Rift Embayment). It is located some 25 km SE of Addis Ababa and 7 km NE of Melka Kunture, on the left interfluve of the Awash river. and has recently been dated at 4.37±0.07 Ma by K-Ar. It constitutes a major obsidian source-area. In the vicinity of Melka Kunture, obsidian is a major component of lithic series since the Oldowayan. Since 1999, new investigations have been undertaken on the prehistory and volcano-sedimentary environments of Melka Kunture and a special attention was paid to obsidian artefacts and its primary and secondary sources. Analyses were performed on several obsidian samples from various locations, both in situ from a lava flow of Balchit and reworked debris or pebbles from different alluvial formations of the Awash river and its tributaries. The trace element contents of two Balchit samples from the main obsidianbearing lava flow and of nine obsidian pebbles from alluvial deposits were determined by ICP-MS at LGCA (Grenoble) and at SOCFAC (Southampton), using the same experimental procedure. Six obsidians pebbles were found to present the same (type A) elemental composition as the two Balchit obsidians and therefore might come from this mother-rock. The three other obsidians present specific trace element systematics dubbed respectively as types B, C and D.
dc.language.isoen
dc.source.titleColloque du GMPCA "Archéométrie 2005". INSTN-CEA, Saclay, 19-22 avril 2005.
dc.title.enBalchit Obsidian (Upper Awash, Ethiopia)
dc.typeCommunication dans un congrès avec actes
dc.subject.halSciences de l'Homme et Société/Archéologie et Préhistoire
dc.subject.halSciences de l'Homme et Société/Etudes de l'environnement
bordeaux.journalColloque du GMPCA "Archéométrie 2005". INSTN-CEA, Saclay, 19-22 avril 2005
bordeaux.hal.laboratoriesPACEA - UMR 5199*
bordeaux.peerReviewedoui
hal.identifierhalshs-00004023
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//halshs-00004023v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.btitle=Colloque%20du%20GMPCA%20%22Arch%C3%A9om%C3%A9trie%202005%22.%20INSTN-CEA,%20Saclay,%2019-22%20avril%202005.&rft.jtitle=Colloque%20du%20GMPCA%20%22Arch%C3%A9om%C3%A9trie%202005%22.%20INSTN-CEA,%20Saclay,%2019-22%20avril%202005&rft.date=2005&rft.au=RAYNAL,%20Jean-Paul&POUPEAU,%20G%C3%A9rard&KIEFFER,%20Guy&PIPERNO,%20Marcello&ANDY%20MILTON,%20J.&rft.genre=proceeding


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