Zobrazeno 1 - 10
of 68
pro vyhledávání: '"James F. Luhr"'
Autor:
Surendra P. Verma, James F. Luhr
Publikováno v:
Geofísica Internacional, Vol 32, Iss 4, Pp 617-631 (1993)
Se reportan los datos de elementos traza y las composiciones isotópicas de Sr, Nd y Pb en andesitas calco-alcalinas del Volcán Colima y se comparará con otros centros volcánicos del Cinturón Volcánico Mexicano. Los patrones de elementos de Tier
Externí odkaz:
https://doaj.org/article/e3d5861d2b2540c19c023a165d0c3fe6
Autor:
James F. Luhr
Publikováno v:
Geofísica Internacional, Vol 32, Iss 4, Pp 591-603 (1993)
Se reportan las concentraciones y modos para 10 lavas andesíticas y dacíticas de la Etapa I del Volcán de Colima. Nueve de estas muestras fueron colectadas en la pared de la caldera que se formó por uno o varios eventos tipo colapso Sta. Helena d
Externí odkaz:
https://doaj.org/article/dfbee7b00ed642df97cc113bec01fb70
Autor:
James F. Luhr, Carlos Navarro-Ochoa, Charles B. Connor, Ivan P. Savov, Costanza Bonadonna, Laura Connor
Publikováno v:
Volcán de Colima ISBN: 9783642259104
Volcán de Colima: Portrait of a Persistently Hazardous Volcano
Volcán de Colima: Portrait of a Persistently Hazardous Volcano pp. 81-110
Volcán de Colima: Portrait of a Persistently Hazardous Volcano
Volcán de Colima: Portrait of a Persistently Hazardous Volcano pp. 81-110
A crucial problem at most volcanoes is reconstructing past eruptions from the geological record. The rapid erosion of many volcanic terrains results in geologically recent eruptions leaving a relatively sparse record of the event. Here we consider th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c9c83af2266d89bcf8e17a70ed0b727e
https://doi.org/10.1007/978-3-642-25911-1_3
https://doi.org/10.1007/978-3-642-25911-1_3
Publikováno v:
Journal of Volcanology and Geothermal Research. 197:85-107
Isla Isabel is a small island (~ 1.06 km2) off the coast of Nayarit where intraplate-type alkali-basaltic volcanic rocks erupted during the Quaternary, and one of two Mexican islands (along with Isla Guadalupe) where it is known that the alkali basal
Autor:
Todd B. Housh, Marco Antonio Rojas-Beltrán, José Jorge Aranda-Gómez, Cristina Noyola-Medrano, James F. Luhr
Publikováno v:
Journal of Volcanology and Geothermal Research. 197:123-132
The term “neck in a basin” (NIB) landform is proposed for volcanic structures characterized by nearly circular to elliptical open basins, located near the headwater of small streams or drainages, which contain small volcanic necks and/or erosion
Autor:
James F. Luhr, Craig A. Chesner
Publikováno v:
Journal of Volcanology and Geothermal Research. 197:259-278
The Toba Caldera in Northern Sumatra, Indonesia is the site of Earth's largest Quaternary volcanic eruption. This eruption, dated at 74 ka, produced the 2800 km3 Youngest Toba Tuff (YTT) and ash-fall. Quartz-bearing silicic pumices ranging from 68 to
Autor:
James F. Luhr, Surendra P. Verma
Publikováno v:
Journal of Volcanology and Geothermal Research. 197:33-51
We report new geochemical and Sr, Nd, and Pb radiogenic isotope data on Pleistocene to Recent subalkaline, basanite–minette, and mixed alkaline magmas from the Cantaro–Colima volcanic chain in the western part of the Mexican Volcanic Belt (MVB).
Publikováno v:
Journal of Volcanology and Geothermal Research. 197:1-32
Volcan de Colima in Western Mexican Volcanic Belt is the most active volcano in North America. We present a detailed tephrochronological study of its Holocene proximal tephra-fall, pyroclastic surge and pyroclastic flow deposits based on 98 new strat
Autor:
James F. Luhr, Anton H. Maria
Publikováno v:
Journal of Petrology. 49:2123-2156
We present geochemical data for Quaternary basalts, basanites, and lamprophyres within the Colima and Mascota volcanic fields at the western end of the Mexican Volcanic Belt. On the basis of data for 11 whole-rock samples plus 124 glass inclusions an
Autor:
James F. Luhr
Publikováno v:
Journal of Volcanology and Geothermal Research. 175:394-407
Primary igneous anhydrite was first identified in 1982 El Chichon pumices. Analysis of the sulfur budget for the eruption provided compelling evidence that the pre-eruptive magma contained a significant gas phase at ∼ 7 km depth in order to account