Breakup of the last layer during lithospheric separation recorded by crust first-mantle second and mantle first-crust second breakup scenarios at East and West Indian margins.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27350%2F22%3A10250950" target="_blank" >RIV/61989100:27350/22:10250950 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.lyellcollection.org/doi/10.1144/SP524-2021-109" target="_blank" >https://www.lyellcollection.org/doi/10.1144/SP524-2021-109</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1144/SP524-2021-109" target="_blank" >10.1144/SP524-2021-109</a>

Jazyk výsledku

čeština

Název v původním jazyce

Breakup of the last layer during lithospheric separation recorded by crust first-mantle second and mantle first-crust second breakup scenarios at East and West Indian margins.

Popis výsledku v původním jazyce

Compared segments of East and West Indian passive margins have different evolution and crustal architecture. The East Indian margin is less magmatic. It results from a crust first/mantle second breakup scenario of a continent experiencing two rift events. The West Indian margin is more magmatic. It results from a mantle first/crust second breakup scenario of a continent experiencing four rift events. The architecture across both margins can be divided into stretching, thinning and hyperextension zones. The East Indian margin is characterized by oceanward-dipping listric normal faults accommodating thinning in the thinning and hyperextension zones and a zone of the exhumed mantle separating continental and oceanic crusts. The West Indian margin in contrast is characterized by landward-dipping listric faults accommodating magma-assisted thinning in the thinning and hyperextension zones and no exhumed mantle. The final breakup affects the lithospheric mantle layer in the East Indian case and the crustal layer in the West Indian case. Although the temperature-dependent rheologies of these two last unbroken layers are rather different, seismic interpretation suggests that they are both broken by upward-convex normal faults, which succeed the development of listric faults. They appear to be the first spontaneously formed faults in the breakup-delivering process, although their nucleation may be magma-assisted. The main difference between controlling factors of the aforementioned breakup scenarios affecting similar lithospheres at similar extension rates is the cumulative time length of pre-breakup rift events, being 62 and 115 Ma at East and West Indian margins.

Název v anglickém jazyce

Breakup of the last layer during lithospheric separation recorded by crust first-mantle second and mantle first-crust second breakup scenarios at East and West Indian margins.

Popis výsledku anglicky

Compared segments of East and West Indian passive margins have different evolution and crustal architecture. The East Indian margin is less magmatic. It results from a crust first/mantle second breakup scenario of a continent experiencing two rift events. The West Indian margin is more magmatic. It results from a mantle first/crust second breakup scenario of a continent experiencing four rift events. The architecture across both margins can be divided into stretching, thinning and hyperextension zones. The East Indian margin is characterized by oceanward-dipping listric normal faults accommodating thinning in the thinning and hyperextension zones and a zone of the exhumed mantle separating continental and oceanic crusts. The West Indian margin in contrast is characterized by landward-dipping listric faults accommodating magma-assisted thinning in the thinning and hyperextension zones and no exhumed mantle. The final breakup affects the lithospheric mantle layer in the East Indian case and the crustal layer in the West Indian case. Although the temperature-dependent rheologies of these two last unbroken layers are rather different, seismic interpretation suggests that they are both broken by upward-convex normal faults, which succeed the development of listric faults. They appear to be the first spontaneously formed faults in the breakup-delivering process, although their nucleation may be magma-assisted. The main difference between controlling factors of the aforementioned breakup scenarios affecting similar lithospheres at similar extension rates is the cumulative time length of pre-breakup rift events, being 62 and 115 Ma at East and West Indian margins.

Druh

C - Kapitola v odborné knize

CEP obor

—

OECD FORD obor

10500 - Earth and related environmental sciences

Projekt

—

Návaznosti

N - Vyzkumna aktivita podporovana z neverejnych zdroju

Rok uplatnění

2022

Kód důvěrnosti údajů

C - Předmět řešení projektu podléhá obchodnímu tajemství (§ 504 Občanského zákoníku), ale název projektu, cíle projektu a u ukončeného nebo zastaveného projektu zhodnocení výsledku řešení projektu (údaje P03, P04, P15, P19, P29, PN8) dodané do CEP, jsou upraveny tak, aby byly zveřejnitelné.

Název knihy nebo sborníku

Geological Society Special Publication. Volume 524

ISBN

978-1-78620-571-1

Počet stran výsledku

47

Strana od-do

1-47

Počet stran knihy

256

Název nakladatele

Geological Society of London

Místo vydání

Londýn

Kód UT WoS kapitoly

—