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Reologia magm

Reologia magm

Brahim Ouargaga

71,90 €
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Editorial:
KS OmniScriptum Publishing
Año de edición:
2026
Materia
Geología y la litosfera
ISBN:
9786630415377
71,90 €
IVA incluido
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Zachowanie reologiczne magm opisują równania Einsteina-Roscoe’a. Istnieje kilka czynników, które mogą wpływać na tę reologię poprzez regulację jej lepkości; najważniejsze z nich to temperatura i krystaliczność. Według Fernandeza i in. magmy wykazują trzy rodzaje zachowań reologicznych: i. zachowanie newtonowskie, charakteryzujące się stałą lepkością dla frakcji krystaliczności w zakresie od 0,1 do 0,3, ii. zachowanie binghamowskie lub pseudoplastyczne (φ = 0,3-0,65), a wreszcie zachowanie sztywne dla wartości φ ≈ 0,65-0,70. Skały magmowe stanowią uderzające przykłady wpływu zmian właściwości reologicznych magmy na struktury, które powstają w różnych momentach ich historii. Schliereny, uwarstwienia i pasmowania są charakterystyczne dla zachowania newtonowskiego, OPF (preferencyjna orientacja kształtu) dla drugiego typu zachowania, a pęknięcia i żyły postmagmowe dla trzeciego i ostatniego typu zachowania.

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