Composition, Provenance, and Tectonic Setting of the Southern Kangurtag Accretionary Complex in the Eastern Tianshan, NW China: Implications for the Late Paleozoic Evolution of the North Tianshan Ocean

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F19%3A10425616" target="_blank" >RIV/00216208:11310/19:10425616 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=koKKwUyaFh" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=koKKwUyaFh</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1029/2018TC005385" target="_blank" >10.1029/2018TC005385</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Composition, Provenance, and Tectonic Setting of the Southern Kangurtag Accretionary Complex in the Eastern Tianshan, NW China: Implications for the Late Paleozoic Evolution of the North Tianshan Ocean

Popis výsledku v původním jazyce

The Kangurtag belt in the Eastern Tianshan, connecting the Dananhu Arc with the Central Tianshan Arc, contains diagnostic rocks of accretionary origin, and thus provides key information about the evolution of the North Tianshan Ocean. The Southern Kangurtag belt is composed of two types of melange. Type I melange consists of Enriched Mid-Ocean Ridge Basalt-type pillow basalts, draped by biohermal limestones and carbonate-siliceous sediments of a slope facies, and siliceous argillites from a hemipelagic-pelagic environment that together make up a seamount assemblage. In Type II melange, Normal Mid-Ocean Ridge Basalt and ribbon cherts were dismembered and entrained in a clastic matrix, showing a &quot;block-in-matrix&quot; structure. Detrital zircons of four sandstones from Devonian and Carboniferous strata within the melanges have a predominant age population of 410-430 Ma and a distinct Proterozoic cluster around 1.4-1.6 Ga. The epsilon Hf(t) values of Phanerozoic zircons range from -25.1 to +8.6. Such age patterns, typical of the Central Tianshan Arc, and the Hf isotopic data indicate that these sedimentary successions were deposited on the northern margin of the Central Tianshan Arc. The youngest detrital zircon age of 317 Ma provides an upper limit for the time of formation of the Southern Kangurtag accretionary complex. Therefore, we suggest that the Southern Kangurtag belt comprises an accretionary complex that developed during southward subduction of the North Tianshan Ocean beneath the Central Tianshan Arc. This subduction began in the Early Ordovician and may have lasted until the Late Carboniferous-Permian.

Název v anglickém jazyce

Composition, Provenance, and Tectonic Setting of the Southern Kangurtag Accretionary Complex in the Eastern Tianshan, NW China: Implications for the Late Paleozoic Evolution of the North Tianshan Ocean

Popis výsledku anglicky

The Kangurtag belt in the Eastern Tianshan, connecting the Dananhu Arc with the Central Tianshan Arc, contains diagnostic rocks of accretionary origin, and thus provides key information about the evolution of the North Tianshan Ocean. The Southern Kangurtag belt is composed of two types of melange. Type I melange consists of Enriched Mid-Ocean Ridge Basalt-type pillow basalts, draped by biohermal limestones and carbonate-siliceous sediments of a slope facies, and siliceous argillites from a hemipelagic-pelagic environment that together make up a seamount assemblage. In Type II melange, Normal Mid-Ocean Ridge Basalt and ribbon cherts were dismembered and entrained in a clastic matrix, showing a &quot;block-in-matrix&quot; structure. Detrital zircons of four sandstones from Devonian and Carboniferous strata within the melanges have a predominant age population of 410-430 Ma and a distinct Proterozoic cluster around 1.4-1.6 Ga. The epsilon Hf(t) values of Phanerozoic zircons range from -25.1 to +8.6. Such age patterns, typical of the Central Tianshan Arc, and the Hf isotopic data indicate that these sedimentary successions were deposited on the northern margin of the Central Tianshan Arc. The youngest detrital zircon age of 317 Ma provides an upper limit for the time of formation of the Southern Kangurtag accretionary complex. Therefore, we suggest that the Southern Kangurtag belt comprises an accretionary complex that developed during southward subduction of the North Tianshan Ocean beneath the Central Tianshan Arc. This subduction began in the Early Ordovician and may have lasted until the Late Carboniferous-Permian.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Tectonics

ISSN

0278-7407

e-ISSN

—

Svazek periodika

38

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

24

Strana od-do

2779-2802

Kód UT WoS článku

000497850300010

EID výsledku v databázi Scopus

2-s2.0-85070493609