Structure of the Northern Altar Pull-Apart Basin Revealed by a 2D Reflection Seismic Survey: Evolution of the Gulf of California Shear Zone in Northwest Mexico
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F22%3A00560716" target="_blank" >RIV/67985530:_____/22:00560716 - isvavai.cz</a>
Výsledek na webu
<a href="https://link.springer.com/article/10.1007/s00024-022-03138-1" target="_blank" >https://link.springer.com/article/10.1007/s00024-022-03138-1</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s00024-022-03138-1" target="_blank" >10.1007/s00024-022-03138-1</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Structure of the Northern Altar Pull-Apart Basin Revealed by a 2D Reflection Seismic Survey: Evolution of the Gulf of California Shear Zone in Northwest Mexico
Popis výsledku v původním jazyce
The northern Gulf of California and Salton Trough contain segmented marginal basins abandoned during the oblique rift system's evolution during Late Miocene-Early Pliocene. The Altar basin, in northwestern Sonora, Mexico, contains a > 5 km-thick sedimentary record representing the first marine incursion (Late Miocene) of the Gulf of California seaway followed by the first deltaic deposits of the Colorado River. 2D reflection seismic lines were processed and interpreted to characterize tectonostrati-graphic features of the transtensional Pacific-North America plate boundary in the northern Altar basin (deep structure, faults controlling the subsidence and accumulation of deltaic deposits). The results show the acoustic basement becoming increasingly shallow toward the northeast, new NW-trending faults, and three major seismic reflectors defining the base of three units: A (oldest), B, and C (youngest). Through similarities in sequence stratigraphy and fauna, we correlate Unit A with the Bouse Formation (SW Arizona and SE California), implying its presence in northwest Mexico. The Altar fault strikes similar to N45 degrees W and aligns with the Dunas fault (SE California), suggesting that these faults are the same continuous structure. Seismic horizons above horizon C are less affected by faults. In contrast, horizons A, B and C are cut by faults, have steeper dips, and are laterally discontinuous. We propose the deposition of unfaulted strata occurred after the latest Pliocene abandonment of the Altar basin. Cessation of major transtensional activity in the Altar basin is coincident with a regional westward shift of transtensional plate boundary deformation, preserving a record of the evolving Gulf of California shear zone in northwest Mexico.
Název v anglickém jazyce
Structure of the Northern Altar Pull-Apart Basin Revealed by a 2D Reflection Seismic Survey: Evolution of the Gulf of California Shear Zone in Northwest Mexico
Popis výsledku anglicky
The northern Gulf of California and Salton Trough contain segmented marginal basins abandoned during the oblique rift system's evolution during Late Miocene-Early Pliocene. The Altar basin, in northwestern Sonora, Mexico, contains a > 5 km-thick sedimentary record representing the first marine incursion (Late Miocene) of the Gulf of California seaway followed by the first deltaic deposits of the Colorado River. 2D reflection seismic lines were processed and interpreted to characterize tectonostrati-graphic features of the transtensional Pacific-North America plate boundary in the northern Altar basin (deep structure, faults controlling the subsidence and accumulation of deltaic deposits). The results show the acoustic basement becoming increasingly shallow toward the northeast, new NW-trending faults, and three major seismic reflectors defining the base of three units: A (oldest), B, and C (youngest). Through similarities in sequence stratigraphy and fauna, we correlate Unit A with the Bouse Formation (SW Arizona and SE California), implying its presence in northwest Mexico. The Altar fault strikes similar to N45 degrees W and aligns with the Dunas fault (SE California), suggesting that these faults are the same continuous structure. Seismic horizons above horizon C are less affected by faults. In contrast, horizons A, B and C are cut by faults, have steeper dips, and are laterally discontinuous. We propose the deposition of unfaulted strata occurred after the latest Pliocene abandonment of the Altar basin. Cessation of major transtensional activity in the Altar basin is coincident with a regional westward shift of transtensional plate boundary deformation, preserving a record of the evolving Gulf of California shear zone in northwest Mexico.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10507 - Volcanology
Návaznosti výsledku
Projekt
—
Návaznosti
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2022
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Pure and Applied Geophysics
ISSN
0033-4553
e-ISSN
1420-9136
Svazek periodika
179
Číslo periodika v rámci svazku
9
Stát vydavatele periodika
CH - Švýcarská konfederace
Počet stran výsledku
26
Strana od-do
3191-3126
Kód UT WoS článku
000849301400001
EID výsledku v databázi Scopus
2-s2.0-85137200868