Sedimentary characteristics of Ediacaran-Cambrian drastic global climate changes in the Proto-Tethys/Panthalassic Ocean: Insights from the Hormuz Complex, southern Iran

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F25%3A00617453" target="_blank" >RIV/67985530:_____/25:00617453 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11310/25:10497137

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S003101822400659X?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S003101822400659X?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.palaeo.2024.112670" target="_blank" >10.1016/j.palaeo.2024.112670</a>

Result language

angličtina

Original language name

Sedimentary characteristics of Ediacaran-Cambrian drastic global climate changes in the Proto-Tethys/Panthalassic Ocean: Insights from the Hormuz Complex, southern Iran

Original language description

The late Ediacaran was marked by significant global warming events, coinciding with global icehousegreenhouse episodes, the oxygenation of the atmosphere-ocean system, the emergence of post-glaciogenic structures, Ediacaran biota, and a pronounced negative carbon isotope excursion known as the 'Shuram Excursion'. This event has been documented across numerous paleocontinents worldwide during this transition. We report evidence of possible late Ediacaran (ca. 560 Ma) syn-glaciogenic and post-glaciogenic deposits from the late Neoproterozoic Hormuz Complex, found in the megaclasts me<acute accent>lange within the Paskhand salt diapir caprock of the Zagros Mountains in southern Iran. Investigations of the sedimentary characteristics of the megaclasts of Hormuz carbonate reveal layers of massive dolomitic diamictites, stratified diamictite, dolomitic cap carbonate, stromatolitic-oolitic carbonate, and minor siliciclastic deposits, which were originally overlain by a 2-km-thick sequence of Hormuz salt. These sedimentary successions not only highlight a distinct progression in the sedimentary evolution from subglacial to periglacial, glaciomarine, and shallow marine settings, but also demonstrate unique 'Snowball Earth' sedimentary structures such as tepee-like structures, crack sheets, and giant ooids within the Hormuz cap carbonates, which affirm shallow marine sedimentation conditions during the post-Shuram Excursion (SE). Moreover, isotopic analysis show that the carbon isotope ratios in these cap carbonate samples range from5.5 to +2 parts per thousand, which is similar to those found in late Ediacaran cap carbonates deposited during the post-glaciation global warming Shuram event. Radiogenic Sr isotopes of the cap carbonates, in combination with 143Nd/144Nd isotopic data indicate increased terrestrial input related to Gondwana's assembly during late Ediacaran to Cambrian transition. Our findings offer new insight into the relationship between sedimentary evolution, climatic conditions, and tectonics in the late Ediacaran period within shallow Proto-Tethys/Panthalassic Ocean. This significant period in Earth's history culminated in the development of complex multicellular life forms (Metazoa).

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/GC20-18647J" target="_blank" >GC20-18647J: Influence of caprock on the growth dynamics of salt diapirs in Iran</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

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

Name of the periodical

Palaeogeography, Palaeoclimatology, Palaeoecology

ISSN

0031-0182

e-ISSN

1872-616X

Volume of the periodical

660

Issue of the periodical within the volume

Febr.

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

26

Pages from-to

112670

UT code for WoS article

001420544900001

EID of the result in the Scopus database

2-s2.0-85213575754