文章基本信息

标题：Geology of the late Pleistocene Tres Vírgenes Volcanic Complex, Baja California Sur (México)
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作者：Denis Ramón Avellán ; José Luis Macías ; José Luis Arce 等
期刊名称：Journal of Maps
印刷版ISSN：1744-5647
出版年度：2019
卷号：15
期号：2
页码：227-237
DOI：10.1080/17445647.2019.1576552
出版社：Journal of Maps
摘要：The geological map of the Tres Vírgenes Volcanic Complex (TVVC) Baja California Sur, México consists of three northeast-southwest aligned stratovolcanoes named from older to younger, El Viejo, El Azufre, and La Virgen. The map (scale 1:20,000) comprises an area of 856 km 2 edited on an ArcMap data set. The map compiles previous studies combined with new mapping and stratigraphy supported by 5 new 230 Th/U geochronology in zircons. The TVVC sits on top of Cretaceous granite, Cenozoic volcaniclastics, the Esperanza basalt (7.64 Ma), and the Aguajito ignimbrite (1.17 Ma). The TVVC commenced its activity around 300 ka by constructing El Viejo volcano, followed by El Azufre volcano (∼173–128 ka), la Virgen scoria cones (∼128–112 ka), and La Virgen stratovolcano (∼112–22 ka). The La Virgen volcano emplaced the La Virgen rhyolitic tephra (∼31 ka), and the Upper Andesite lavas (∼22 ka).
关键词：Geology ; Volcanic stratigraphy ; Tres Vírgenes Volcanic Complex ; Baja California