シリア北部における新生代後期アルカリ玄武岩マグマの活動

DOI 機関リポジトリ HANDLE Web Site オープンアクセス

書誌事項

タイトル別名
  • Late Cenozoic volcanic activity of alkaline basalt in northern Syria
  • シリア ホクブ ニ オケル シンセイダイ コウキ アルカリ ゲンブガン マグマ ノ カツドウ

この論文をさがす

抄録

The northeastern part of the Bishri area, Syria consists of Neogene sedimentary rocks, Neogene- Quaternary volcanic rocks and Quaternary sediments of fluviatile and aeolian in origin. Volcanic eruptions took place in the area and lava flows and pyroclastic deposits covered the Bishri basement rocks in four places: the Al Treb, Zenobia-Halabiye, Mankhar Gharbi and Mankhar Sharqi volcanoes. The following ages were obtained from K-Ar dating performed on three basaltic lavas: 2.72±0.09 Ma B.P. for Al Treb, 2.60 ±0.08 Ma B.P. for Zenobia-Halabiye and 1.38±0.08 Ma B.P. for Mankhar Gharbi. Petrographical and petrochemical analyses indicate that the rocks from the older volcanoes are identified as basanite of the per-alkaline variety, whereas those of the younger volcano are identified as foidite of the hyper-alkaline variety. Foidite lava, terrestrially very rare in occurrence, characteristically contains phenocrystic nepheline crystals in which groundmass crystals of clinopyroxene and opaque minerals are embedded poikilitically. Identification of the basaltic rocks is significantly useful for Archaeological investigation, and this study could offer some petrographical and petrochemical parameters for that kind of identification.

収録刊行物

詳細情報 詳細情報について

問題の指摘

ページトップへ