Tokar dutse mai aman wuta

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Wikidata.svgTokar dutse mai aman wuta
group or class of chemical substances (en) Fassara
Eyjafjallajokull-April-17.JPG
Bayanai
Ƙaramin ɓangare na Toka da pyroclastic material (en) Fassara

Tokar dutse mai aman wuta wato 'volcanic eruption' wani ɓaɓɓake daga dutse, ma'adanai, da kuma volcanic gilashi, halitta a lokacin volcanic eruptions da kuma aunawa kasa da 2 mm (0,079 inci) a diamita.

Hakanan ana amfani da kalmar tokar aman wuta sau da yawa don nufin duk samfuran fashewar abubuwa (wanda ake kira tephra ), gami da barbashi mafi girma fiye da 2 mm. An samar da tokar ƙanƙara yayin fashewar dutsen mai fashewa lokacin da iskar gas a cikin magma ta faɗaɗa kuma ta tsere cikin yanayi ta faɗaɗa kuma ta tsere cikin yanayi.

Ƙarfin gas ɗin ya farfasa magma kuma ya tura shi cikin sararin samaniya inda ya kakkarye zuwa gutsuttsarin dutse da gilashi. Hakanan ana samar da toka lokacin da magma ta sadu da ruwa yayin fashewar phreatomagmatic, yana haifar da ruwan ya fashe da fashewa zuwa tururi wanda ke haifar da fashewar magma.

Da zarar cikin iska, iskar tana ɗaukar iska zuwa dubban kilomita.

KIRKIRA[gyara sashe | Gyara masomin]

Ana samar da toka mai aman wuta a lokacin fashewar dutsen mai fashewa, fashewar phreatomagmatic da lokacin jigilar abubuwa a cikin guguwa mai yawa.

Fashewar wutar dutsen na faruwa lokacin da magma decompresses matsayin da ta fito, kyale narkar volatiles (dominantly ruwa da carbon dioxide) zuwa exsolve cikin gas kumfa. 

Yayin da ake samar

Lokacin da rarrabuwar kai ke faruwa, kumburin faɗaɗa mai ƙarfi yana yayyafa magma zuwa cikin gutsuttsuran da ake fitar da su cikin sararin samaniya inda suke ƙaruwa cikin barbashi da ƙarin kumfa kumfa, wanda ke rage yawan magma, yana hanzarta shi a cikin bututun. Rarrabawa yana faruwa lokacin da kumfa ke mamaye ~ 70-80 vol% na cakuda mai fashewa.

Manazarta[gyara sashe | Gyara masomin]

Rose, W.I.; Durant, A.J. (2009). "Fine ash content of explosive eruptions". Journal of Volcanology and Geothermal Research. 186 (1–2): 32–39.

Wilson, T.M.; Stewart, C. (2012). "Volcanic Ash". In P, Bobrowsky (ed.). Encyclopaedia of Natural Hazards. Springer. p. 1000.

Parfitt, E.A.; Wilson, L. (2008). Fundamentals of Physical Volcanology. Massachusetts, USA: Blackwell Publishing. p. 256.