Spatial and temporal evolution of basalts and magnesian andesites (“bajaites”) from Baja California, Mexico: the role of slab melts

详细信息    查看全文

• 作者：Calmus ; T. ; Aguill&oacute ; n-Robles ; A. ; Maury ; R.C. ; Bellon ; H. ; Benoit ; M. ; Cotten ; J. ; Bourgois ; J. ; et. al.
• 关键词：Magnesian andesite ; Slab melt ; Mantle wedge ; Asthenospheric window ; Baja California ; Mexico
• 刊名：Lithos
• 出版年：2003
• 出版时间：January, 2003
• 年：2003
• 卷：66
• 期：1-2
• 页码：77-105
• 全文大小：818 K

文摘

Late Miocene to Quaternary basalts and associated magnesian basaltic andesites and andesites, locally referred to as “bajaites”, occur in the central part of the Baja California (BC) Peninsula. They form five volcanic fields (Jaraguay, San Borja, San Ignacio, Santa Rosalia, La Purisima) delineating a 600-km-long array parallel to the Gulf of California. They range in age from Late Miocene to Pleistocene, and display very specific geochemical characteristics: SiO<sub>2