Tephrochronology of the upper Río Cisnes valley (44°S), southern Chile
Based on their petrography and chemistry, 18 tephra analyzed from two lake and bog cores and one outcrop in the upper Río Cisnes valley are believed to have been derived from nine different eruptions of the Mentolat volcano, four of the Melimoyu volcano, and one from the Hudson volcano. Some of thes...
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Servicio Nacional de Geología y Minería (SERNAGEOMIN)
2015
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oai:scielo:S0718-710620150002000022015-06-26Tephrochronology of the upper Río Cisnes valley (44°S), southern ChileStern,Charles Rde Porras,María EugeniaMaldonado,Antonio Tephra Tephrochronology Tephrostratigraphy Volcanism Andes Chile Based on their petrography and chemistry, 18 tephra analyzed from two lake and bog cores and one outcrop in the upper Río Cisnes valley are believed to have been derived from nine different eruptions of the Mentolat volcano, four of the Melimoyu volcano, and one from the Hudson volcano. Some of these tephra correlate chronologically and petrochemically with previously documented large eruptions of these volcanoes, including the Late-Glacial Ho eruption of Hudson (17,340 cal yrs BP), the mid-Holocene MEN1 eruption of Mentolat (7,710 cal yrs BP), and the Late-Holocene MEL2 eruption of Melimoyu (1,680 cal yrs BP). A Melimoyu-derived tephra from the outcrop occurs in glacial-lacustrine sediments and is considered to pre-date the Last Glacial Maximum (>19,670 cal yrs BP). The data suggest that none of the tephra were produced by explosive eruptions of the Maca, Cay and Yanteles volcanoes.info:eu-repo/semantics/openAccessServicio Nacional de Geología y Minería (SERNAGEOMIN)Andean geology v.42 n.2 20152015-05-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062015000200002en10.5027/andgeoV42n2-a02 |
| institution |
Scielo Chile |
| collection |
Scielo Chile |
| language |
English |
| topic |
Tephra Tephrochronology Tephrostratigraphy Volcanism Andes Chile |
| spellingShingle |
Tephra Tephrochronology Tephrostratigraphy Volcanism Andes Chile Stern,Charles R de Porras,María Eugenia Maldonado,Antonio Tephrochronology of the upper Río Cisnes valley (44°S), southern Chile |
| description |
Based on their petrography and chemistry, 18 tephra analyzed from two lake and bog cores and one outcrop in the upper Río Cisnes valley are believed to have been derived from nine different eruptions of the Mentolat volcano, four of the Melimoyu volcano, and one from the Hudson volcano. Some of these tephra correlate chronologically and petrochemically with previously documented large eruptions of these volcanoes, including the Late-Glacial Ho eruption of Hudson (17,340 cal yrs BP), the mid-Holocene MEN1 eruption of Mentolat (7,710 cal yrs BP), and the Late-Holocene MEL2 eruption of Melimoyu (1,680 cal yrs BP). A Melimoyu-derived tephra from the outcrop occurs in glacial-lacustrine sediments and is considered to pre-date the Last Glacial Maximum (>19,670 cal yrs BP). The data suggest that none of the tephra were produced by explosive eruptions of the Maca, Cay and Yanteles volcanoes. |
| author |
Stern,Charles R de Porras,María Eugenia Maldonado,Antonio |
| author_facet |
Stern,Charles R de Porras,María Eugenia Maldonado,Antonio |
| author_sort |
Stern,Charles R |
| title |
Tephrochronology of the upper Río Cisnes valley (44°S), southern Chile |
| title_short |
Tephrochronology of the upper Río Cisnes valley (44°S), southern Chile |
| title_full |
Tephrochronology of the upper Río Cisnes valley (44°S), southern Chile |
| title_fullStr |
Tephrochronology of the upper Río Cisnes valley (44°S), southern Chile |
| title_full_unstemmed |
Tephrochronology of the upper Río Cisnes valley (44°S), southern Chile |
| title_sort |
tephrochronology of the upper río cisnes valley (44°s), southern chile |
| publisher |
Servicio Nacional de Geología y Minería (SERNAGEOMIN) |
| publishDate |
2015 |
| url |
http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062015000200002 |
| work_keys_str_mv |
AT sterncharlesr tephrochronologyoftheupperriocisnesvalley44ssouthernchile AT deporrasmariaeugenia tephrochronologyoftheupperriocisnesvalley44ssouthernchile AT maldonadoantonio tephrochronologyoftheupperriocisnesvalley44ssouthernchile |
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