Highly siderophile element and Os isotope systematics of the Cenozoic volcanic rocks from the Eastern Pontides, NE Turkey: Constraints on the origin and evolution of subcontinental mantle-derived magmas

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F22%3A00000156" target="_blank" >RIV/00025798:_____/22:00000156 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985831:_____/22:00550787

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/abs/pii/S0024493721006186?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S0024493721006186?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.lithos.2021.106575" target="_blank" >10.1016/j.lithos.2021.106575</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Highly siderophile element and Os isotope systematics of the Cenozoic volcanic rocks from the Eastern Pontides, NE Turkey: Constraints on the origin and evolution of subcontinental mantle-derived magmas

Popis výsledku v původním jazyce

The Cenozoic subalkaline to alkaline volcanic rocks from the Eastern Pontides Orogenic Belt (EPOB) in NETurkey exhibit wide range of highly siderophile element (HSE) contents and Os isotope compositions that can berelated to their mantle sources and parental melt evolution. Although some Eocene rocks show signs of late-stagemodification, most of the studied volcanic rocks possess primary HSE and Os systematics. The Eocene volcanicrocks have largely variable PdN/IrN (~0.25–751), PdN/PtN (~0.25–87) and (187Os/188Os)i ratios (~0.113 to0.51). The Miocene volcanic rocks have high PdN/IrN (~2.6–441), low PdN/PtN (~0.11–1.7) and radiogenic(187Os/188Os)i ratios ranging from ~0.166 to 0.52 while the Mio-Pliocene volcanic rocks show high PdN/IrN of~7.2–29, low PdN/PtN (~1.2–2.7), and only mildly radiogenic (187Os/188Os)i values between ~0.132 and 0.177.Finally, the Quaternary volcanic rocks have low PdN/IrN (~2.3–3.6), PdN/PtN (~0.9–1.6) and radiogenic(187Os/188Os)i values ranging from ~0.133 to 0.194. Overall, the primitive mantle-normalized HSE patterns ofthe studied volcanic rocks are characterized by PPGE (Pt, Pd) and Re enrichment with respect to IPGE (Os, Ir,Ru). The variations in HSE and radiogenic Os isotope compositions of the relatively differentiated volcanic rocksindicate that crustal assimilation played active role in their parental melt evolution, especially in the Eocene andMiocene period. Besides, the obtained HSE data also suggest that the parental magmas of all the studied volcanicrocks were generated mainly in the S-saturated conditions. The temporal and spatial HSE and Os isotope variationsobserved in the studied Cenozoic volcanic rocks reflect the heterogeneity of the mantle source beneath theEPOB, which could be attributed to variations in response of different fluid/melt metasomatism of the underlyingSCLM.

Název v anglickém jazyce

Highly siderophile element and Os isotope systematics of the Cenozoic volcanic rocks from the Eastern Pontides, NE Turkey: Constraints on the origin and evolution of subcontinental mantle-derived magmas

Popis výsledku anglicky

The Cenozoic subalkaline to alkaline volcanic rocks from the Eastern Pontides Orogenic Belt (EPOB) in NETurkey exhibit wide range of highly siderophile element (HSE) contents and Os isotope compositions that can berelated to their mantle sources and parental melt evolution. Although some Eocene rocks show signs of late-stagemodification, most of the studied volcanic rocks possess primary HSE and Os systematics. The Eocene volcanicrocks have largely variable PdN/IrN (~0.25–751), PdN/PtN (~0.25–87) and (187Os/188Os)i ratios (~0.113 to0.51). The Miocene volcanic rocks have high PdN/IrN (~2.6–441), low PdN/PtN (~0.11–1.7) and radiogenic(187Os/188Os)i ratios ranging from ~0.166 to 0.52 while the Mio-Pliocene volcanic rocks show high PdN/IrN of~7.2–29, low PdN/PtN (~1.2–2.7), and only mildly radiogenic (187Os/188Os)i values between ~0.132 and 0.177.Finally, the Quaternary volcanic rocks have low PdN/IrN (~2.3–3.6), PdN/PtN (~0.9–1.6) and radiogenic(187Os/188Os)i values ranging from ~0.133 to 0.194. Overall, the primitive mantle-normalized HSE patterns ofthe studied volcanic rocks are characterized by PPGE (Pt, Pd) and Re enrichment with respect to IPGE (Os, Ir,Ru). The variations in HSE and radiogenic Os isotope compositions of the relatively differentiated volcanic rocksindicate that crustal assimilation played active role in their parental melt evolution, especially in the Eocene andMiocene period. Besides, the obtained HSE data also suggest that the parental magmas of all the studied volcanicrocks were generated mainly in the S-saturated conditions. The temporal and spatial HSE and Os isotope variationsobserved in the studied Cenozoic volcanic rocks reflect the heterogeneity of the mantle source beneath theEPOB, which could be attributed to variations in response of different fluid/melt metasomatism of the underlyingSCLM.

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

2022

Kód důvěrnosti údajů

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

Název periodika

Lithos

ISSN

0024-4937

e-ISSN

—

Svazek periodika

410-411

Číslo periodika v rámci svazku

February : 106575

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

19

Strana od-do

nestránkováno

Kód UT WoS článku

000762362700001

EID výsledku v databázi Scopus

2-s2.0-85121855708