FUMAROLIC ACTIVITY OF AVACHINSKY AND KORYAKSKY VOLCANOES, KAMCHATKA, FROM 1993 TO 1994
- DSpace Home
- →
- Геология России
- →
- ELibrary
- →
- View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.
dc.contributor.author | Taran Y.A. | |
dc.contributor.author | Shapar V.N. | |
dc.contributor.author | Ovsyannikov A.A. | |
dc.contributor.author | Bilichenko A.A. | |
dc.contributor.author | Connor C.B. | |
dc.date.accessioned | 2020-12-23T08:31:33Z | |
dc.date.available | 2020-12-23T08:31:33Z | |
dc.date.issued | 1997 | |
dc.identifier | https://elibrary.ru/item.asp?id=13262272 | |
dc.identifier.citation | Bulletin of Volcanology, 1997, , 6, 441-448 | |
dc.identifier.issn | 0258-8900 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/21166 | |
dc.description.abstract | Volcanic gas and condensate samples were collected in 1993–1994 from fumaroles of Koryaksky and Avachinsky, basaltic andesite volcanoes on the Kamchatka Peninsula near Petropavlovsk–Kamchatsky. The highest-temperature fumarolic discharges, 220 °C at Koryaksky and 473 °C at Avachinsky, are water-rich (940–985 mmol/mol of H2O) and have chemical and isotopic characteristics typical of Kamchatka–Kurile, high- and medium-temperature volcanic gases. The temperature and chemical and water isotopic compositions of the Koryaksky gases have not changed during the past 11 years. They represent an approximate 2 : 1 mixture of magmatic and meteoric end members. Low-temperature, near-boiling-point discharges of Avachinsky Volcano are water poor (≈880 mmol/mol); Their compositions have not changed since the 1991 eruption, and are suggested to be derived from partially condensed magmatic gases at shallow depth. Based on a simple model involving mixing and single-step steam separation, low water and high CO2 contents, as well as the observed Cl concentration and water isotopic composition in low-temperature discharges, are the result of near-surface boiling of a brine composed of the almost pure condensed magmatic gas. High methane content in low-temperature Avachinsky gases and the 220 °C Koryaksky fumarole, low C isotopic ratio in CO2 at Koryaksky (–11.8‰), and water isotope data suggest that the "meteoric" end member contains considerable amounts of the regional methane-rich thermal water discovered in the vicinity of both volcanoes. | |
dc.title | FUMAROLIC ACTIVITY OF AVACHINSKY AND KORYAKSKY VOLCANOES, KAMCHATKA, FROM 1993 TO 1994 | |
dc.type | Статья |
Files in this item
This item appears in the following Collection(s)
-
ELibrary
Метаданные публикаций с сайта https://www.elibrary.ru