Paleoseismology of a Major Crustal Seismogenic Source Near Mexico City: The Southern Border of the Acambay Graben

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985891%3A_____%2F23%3A00574021" target="_blank" >RIV/67985891:_____/23:00574021 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1029/2022TC007610" target="_blank" >https://doi.org/10.1029/2022TC007610</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1029/2022TC007610" target="_blank" >10.1029/2022TC007610</a>

Result language

angličtina

Original language name

Paleoseismology of a Major Crustal Seismogenic Source Near Mexico City: The Southern Border of the Acambay Graben

Original language description

The Trans-Mexican Volcanic Belt is an active continental volcanic arc related to subduction along the Middle America trench. It is characterized by intra-arc extension resulting into several major arc-parallel active fault systems and tectonic basins. The Acambay graben, one of the largest of these basins, is located near Mexico City, in the central part of this province. In 1912, a M 6.9 earthquake ruptured the surface along the northern border of the graben together with at least two other faults. In this paper, we analyze the paleoseismic history of the southern border of the Acambay Graben, with new observations made in one natural outcrop and four paleoseismological trenches excavated across branches of the Venta de Bravo Fault at the site where it overlaps with the Pastores Fault. We present evidence of at least two paleo-earthquakes that occurred between 12,190 ± 175 and 5,822 ± 87 cal year BP and between 647 ± 77 and 250 cal year BP. On one of these branches, we estimate a minimum slip-rate value between 0.1 and 0.23 mm/year for the last 12 ka and a mean recurrence interval of 8.5 ± 3 ka. By considering several likely rupture lengths along the Venta de Bravo and Pastores faults, we calculated a maximum possible magnitude of Mw 7.01 ± 0.27. Finally, by correlating events recorded along different faults within the Acambay Graben, we discuss several possible rupture coalescent scenarios and related consequences for Mexico City.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10505 - Geology

Project

<a href="/en/project/GAP210%2F12%2F0573" target="_blank" >GAP210/12/0573: Late Quaternary seismogenic faulting and evolution of fault-controlled sedimentary basins in the eastern Bohemian Massif</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Tectonics

ISSN

0278-7407

e-ISSN

1944-9194

Volume of the periodical

42

Issue of the periodical within the volume

6

Country of publishing house

US - UNITED STATES

Number of pages

19

Pages from-to

e2022TC007610

UT code for WoS article

001006922400001

EID of the result in the Scopus database

2-s2.0-85162178523