The Cinder Cones of Michoac n-Guanajuato, Central Mexico: Petrology and Chemistry

Hasenaka, Toshiaki; Carmichael, I. S. E.

doi:10.1093/petrology/28.2.241

Cited by 140 publications

(58 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Hornblende andesites at Alberca contain titanomagnetite in groundmass Fig. 1 Geographic setting of the Valle the Santiago: coring positions at Hoya La Alberca and Hoya Rincón de Parangueo (respective asterisks), geographic setting within the Trans-Mexican Volcanic Belt, and in relation to the temporally relevant volcanoes and plagioclase crystals (Hasenaka and Carmichael 1987).…”

Section: Introductionmentioning

confidence: 99%

First lacustrine varve chronologies from Mexico: impact of droughts, ENSO and human activity since AD 1840 as recorded in maar sediments from Valle de Santiago

et al. 2009

View full text Add to dashboard Cite

We present varve chronologies for sediments from two maar lakes in the Valle de Santiago region (Central Mexico): Hoya La Alberca (AD 1852(AD -1973 and Hoya Rincón de Parangueo (AD 1839(AD -1943. These are the first varve chronologies for Mexican lakes. The varved sections were anchored with tephras from Colima (1913) and Paricutín (1943Paricutín ( /1944 and 210 Pb ages. We compare the sequences using the thickness of seasonal laminae and element counts (Al, Si, S, Cl, K, Ti, Mn, Fe, and Sr) determined by micro X-ray fluorescence spectrometry. The formation of the varve sublaminae is attributed to the strongly seasonal climate regime. Limited rainfall and high evaporation rates in winter and spring induce precipitation of carbonates (high Ca, Sr) enriched in 13 C and 18 O, whereas rainfall in summer increases organic and clastic input (plagioclase, quartz) with high counts of lithogenic elements (K, Al, Ti, and Si). Eolian input of Ti occurs also in the dry season. Moving correlations (5-yr windows) of the Ca and Ti counts show similar development in both sequences until the 1930s. Positive correlations indicate mixing of allochthonous Ti and autochthonous Ca, while negative correlations indicate their separation in sublaminae. Negative excursions in the correlations correspond with historic and reconstructed droughts, El Niño events, and This paper is dedicated to our colleague and friend Jim Luhr,

show abstract

Section: Introductionmentioning

confidence: 99%

First lacustrine varve chronologies from Mexico: impact of droughts, ENSO and human activity since AD 1840 as recorded in maar sediments from Valle de Santiago

et al. 2009

View full text Add to dashboard Cite

show abstract

“…Many highresolution studies have been carried out on monogenetic volcanoes in central Mexico. The principal outcome of these studies is the brief (less than 100 years or so) duration of volcanic activities (Hasenaka and Carmichael, 1987;Luhr and Carmichael, 1985;Luhr and Siminik, 1993;Hasenaka, 1994). While it cannot be ascertained whether the Toluquilla volcano first emitted lava or ashes, the duration between these two events may vary from several years to 100 years.…”

Section: Discussionmentioning

confidence: 99%

Paleomagnetic and rock-magnetic study on volcanic units of the Valsequillo Basin: implications for early human occupation in central Mexico

et al. 2009

View full text Add to dashboard Cite

Alleged human and animal footprints were found within the upper bedding surfaces of the Xalnene volcanic ash layer that outcrops in the Valsequillo Basin, south of Puebla, Mexico (Gonzalez et al., 2005). The ash has been dated at 40 ka by optically stimulated luminescence analysis, thereby providing new evidence that America was colonized earlier than the Clovis culture (about 13.5 Ma). We carried out paleomagnetic and rock magnetic analysis on 18 Xalnene ash block and core samples collected at two distinct localities and 19 standard paleomagnetic cores belonging to nearby monogenetic volcanoes. Our data provide evidence that both the volcanic lava flow and Xalnene ash were emplaced during the Laschamp geomagnetic event spanning from about 45 to 39 ka.

show abstract

“…Se sitúa en la parte centro-occidental del mismo y comprende cerca de 400 volcanes de tamaño medio (2-12 km de diáme-tro basal y 100-1000 m de altura; Hasenaka, 1994) y alrededor de 1000 afloramientos de menor entidad producidos por actividad monogenética, incluyendo maares, domos y conos de ceniza (Hasenaka & Carmichael, 1987), entre los cuales pueden encontrarse ~377 pequeños volcanes en escudo andesíticos (Hasenaka, 1994) y más raramente estratovolcanes (e.g. Tancítaro, Patamban), distribuidos en una orthopyroxene (1147-1027 °C) and clinopyroxene (1147-1018 °C).…”

Section: Contexto Geológicounclassified

“…1). Produjo en torno a quince coladas de lavas de las que apenas existe información petrológica ni geoquímica (una única muestra de afinidad calcoalcalina descrita en Hasenaka & Carmichael, 1987). La edad de este volcán tampoco está bien definida, ya que solo existe una determinación radiomé-trica, basada en 14 C, de 4700 ± 200 años (Hasenaka & Carmichael, 1985).…”

Section: Contexto Geológicounclassified

Condiciones de cristalización y diferenciación de las lavas del volcán El Metate (Campo Volcánico de Michoacán-Guanajuato, México)

Losantos¹,

Cebriá²,

Morán-Zenteno³

et al. 2014

Estud. geol.

View full text Add to dashboard Cite

The Cinder Cones of Michoac n-Guanajuato, Central Mexico: Petrology and Chemistry

Cited by 140 publications

References 0 publications

First lacustrine varve chronologies from Mexico: impact of droughts, ENSO and human activity since AD 1840 as recorded in maar sediments from Valle de Santiago

First lacustrine varve chronologies from Mexico: impact of droughts, ENSO and human activity since AD 1840 as recorded in maar sediments from Valle de Santiago

Paleomagnetic and rock-magnetic study on volcanic units of the Valsequillo Basin: implications for early human occupation in central Mexico

Condiciones de cristalización y diferenciación de las lavas del volcán El Metate (Campo Volcánico de Michoacán-Guanajuato, México)

Contact Info

Product

Resources

About