National audienceDuring the Plio-Quaternary, numerous volcanic centres of contrasted compositions were emplaced in the Baja California Peninsula and adjacent Gulf of California. The 43 km2 Isla San Esteban (28o 42 N and 112o 34' W), located in the central part of the gulf near the Pliocene extinct spreading centre of Lower Tiburón basin, is mostly made of andesitic, dacitic and rhyolitic subaerial lava flows, domes, and pyroclastic deposits. A new geological sketch map of the island is presented, as well as new K-Ar ages ranging from 4.5 to 2.5 Ma. Isla San Esteban lavas belong to two nearly contemporaneous magmatic series emplaced within an extensional tectonic framework related to the continental breakoff followed by the progressive ocean...
International audienceNeogene magmatic activity in Central Baja California underwent a major change ...
International audienceNeogene magmatic activity in Central Baja California underwent a major change ...
International audienceNeogene magmatic activity in Central Baja California underwent a major change ...
National audienceDuring the Plio-Quaternary, numerous volcanic centres of contrasted compositions we...
National audienceDuring the Plio-Quaternary, numerous volcanic centres of contrasted compositions we...
National audienceDuring the Plio-Quaternary, numerous volcanic centres of contrasted compositions we...
National audienceDuring the Plio-Quaternary, numerous volcanic centres of contrasted compositions we...
National audienceDuring the Plio-Quaternary, numerous volcanic centres of contrasted compositions we...
Abstract?The study of the geochemical compositions and K-Ar or Ar-Ar ages of ca. 350 Neogene and Qua...
International audienceThe study of the geochemical compositions and K-Ar or Ar-Ar ages of ca. 350 Ne...
International audienceThe study of the geochemical compositions and K-Ar or Ar-Ar ages of ca. 350 Ne...
International audienceThe study of the geochemical compositions and K-Ar or Ar-Ar ages of ca. 350 Ne...
Abstract: The composition of the lithosphere can be fundamentally altered by long-lived subduc-tion ...
International audienceNeogene magmatic activity in Central Baja California underwent a major change ...
International audienceNeogene magmatic activity in Central Baja California underwent a major change ...
International audienceNeogene magmatic activity in Central Baja California underwent a major change ...
International audienceNeogene magmatic activity in Central Baja California underwent a major change ...
International audienceNeogene magmatic activity in Central Baja California underwent a major change ...
National audienceDuring the Plio-Quaternary, numerous volcanic centres of contrasted compositions we...
National audienceDuring the Plio-Quaternary, numerous volcanic centres of contrasted compositions we...
National audienceDuring the Plio-Quaternary, numerous volcanic centres of contrasted compositions we...
National audienceDuring the Plio-Quaternary, numerous volcanic centres of contrasted compositions we...
National audienceDuring the Plio-Quaternary, numerous volcanic centres of contrasted compositions we...
Abstract?The study of the geochemical compositions and K-Ar or Ar-Ar ages of ca. 350 Neogene and Qua...
International audienceThe study of the geochemical compositions and K-Ar or Ar-Ar ages of ca. 350 Ne...
International audienceThe study of the geochemical compositions and K-Ar or Ar-Ar ages of ca. 350 Ne...
International audienceThe study of the geochemical compositions and K-Ar or Ar-Ar ages of ca. 350 Ne...
Abstract: The composition of the lithosphere can be fundamentally altered by long-lived subduc-tion ...
International audienceNeogene magmatic activity in Central Baja California underwent a major change ...
International audienceNeogene magmatic activity in Central Baja California underwent a major change ...
International audienceNeogene magmatic activity in Central Baja California underwent a major change ...
International audienceNeogene magmatic activity in Central Baja California underwent a major change ...
International audienceNeogene magmatic activity in Central Baja California underwent a major change ...