Paleo-environmental and Geological Controls on Late Pleistocene Phreatomagmatism in the Lacustrine Zacapu Basin(Michoacán,Mexico)
The active Mexican Volcanic Belt (MVB) stretches across central Mexico for ～1200 km in an E-W direction from the Gulf of Mexico to the Pacific Ocean. This volcanic arc is related to the subduction of the oceanic Cocos and Rivera Plates underneath the continental North American Plate. It consists of Late Tertiary to Quaternary volcanoes and traverses the southern part of theMexican Altiplano, a highland characterized by normal faulting and horst-and-graben structures. The basins resulting from this extensional regime are/were often occupied by extensive (but shallow) lakes. Another particularity of the MVB is the abundance of scoria cones and other types of monogenetic volcanoes, which outnumber by several orders of magnitude the much larger strato-volcanoes. Although the exact causes responsible for their great number (＞3000) are still unknown, their high frequency of occurrence must be sought in the peculiar geometric configuration of the subduction zone, namely, the relatively low subduction angle and its consequences on the physical-chemical conditions prevailing in the mantle wedge.
maars Michoacan phreatomagmatism
Claus Siebe Pooja Kshirsagar Marie-No(e)lle Guilbaud Sergio Salinas
Departamento de Vulcanología, Instituto de Geofísica, Universidad Nacional Autónoma de México, Ciudad de México, México
国际会议
The 6th International Maar Conference(IMC)(第六届国际玛珥会议)
长春
英文
85-86
2016-07-30（万方平台首次上网日期，不代表论文的发表时间）