Heterogeneous mantle sources feeding the volcanic activity of Mt. Karacadaĝ (SE Turkey)

Michele Lustrino; Mehmet Keskin; Michele Mattioli; Orhan Kavak

doi:10.1016/j.jseaes.2011.11.016

Heterogeneous mantle sources feeding the volcanic activity of Mt. Karacadaĝ (SE Turkey)

Michele Lustrino^*, Mehmet Keskin, Michele Mattioli, Orhan Kavak

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

33 Citations (Scopus)

Abstract

The volcanic activity of Mt. Karacadaĝ (SE Anatolia) is divided into three major stages: Siverek Stage (∼11-2.7Ma), Karacadaĝ Stage (∼1.9-1.0Ma) and Ovabaĝ Stage (0.4-0.01Ma). The magmas are mildly alkaline mafic rocks, mostly basanites, hawaiites and alkali basalts. Detailed geochemical investigation indicates a continuous variation of composition with time, with the oldest products (Siverek Stage) being characterized by average lowest HFSE (Ti, Hf, Zr, Nb, Ta), ¹⁴³Nd/ ¹⁴⁴Nd, Nb/U, Ta/Yb, Nb/Nb and the highest ΔQ, La/Nb, Ti/Nb, Zr/Nb, Ba/Nb, Th/Ta, K/La, and the youngest products (Ovabaĝ Stage) at the opposite end of the trend. The overall incompatible element content of the Karacadaĝ volcanic rocks resembles closely average HIMU-OIB compositions, with the oldest samples deviating more strongly from typical compositions of "anorogenic" magmas. We interpret these geochemical variations with a process of partial melting of a chemically and mineralogically heterogeneous mantle source rather than with process of variable crustal contamination at shallow depths. During the first stages of mantle melting the volumes with lowest solidus temperature (e.g., the amphibole and phlogopite-rich metasomes, particularly abundant in the Arabia mantle xenolith suite) contributed significantly to the partial melts. "Average" peridotitic matrix is involved in partial melting processes only when these metasomatic volumes start to be exhausted, producing mantle melts with geochemical composition resembling average "anorogenic" mildly alkaline sodic rocks, common in the circum-Mediterranean area.

Original language	English
Pages (from-to)	120-139
Number of pages	20
Journal	Journal of Asian Earth Sciences
Volume	46
DOIs	https://doi.org/10.1016/j.jseaes.2011.11.016
Publication status	Published - 2 Mar 2012
Externally published	Yes

Funding

We thank the local people for their warm welcome during the fieldwork. Bob Stern (Dallas, USA) is thanked for the help in collecting Arabian Plate lower crustal xenolith data. Samuele Agostini (Pisa, Italy), Brian G.J. Upton (Edinburgh, UK) and an anonymous referee provided constructive reviews that helped to improve the quality of the manuscript. Raffaello Trigila (Rome) is thanked for designing and assembling the equipment to produce the glassy beads. ML thanks, as usual, his three women Enrica, Bianca and Laura for their immense patience during the writing of this manuscript. ML also thanks Rick Wakeman, Bill Bruford, Steve Howe, Jon Anderson and Chris Squire for being so “fragile”. MK thanks the Istanbul University Research Fund (project # ACIP-1282) for their support during the fieldwork in 2007. This work was supported by a joint project TUBITAK-RFBR (TUBITAK Project # 108Y222, Turkey and RFBR project # 09-05-91220-CT) between 2009 and 2010, by research grants from University La Sapienza (AST 2008, 2009) and from PRIN 2008 (Research Grant#: 2008HMHYFP_005). O.K. thanks M. Sefik İmamoğlu for a discussion on field geology.

Funders	Funder number
Istanbul University Research Fund	ACIP-1282
TUBITAK-RFBR	108Y222
University La Sapienza	2008HMHYFP_005, AST 2008
Russian Foundation for Basic Research	09-05-91220-CT

Keywords

Anatolia
Arabia
Basalt
Geochemistry
Mantle
Petrology
Turkey

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.jseaes.2011.11.016

Cite this

@article{4eb5e176f9ce41b89ddf68dc5d7188cc,

title = "Heterogeneous mantle sources feeding the volcanic activity of Mt. Karacadaĝ (SE Turkey)",

abstract = "The volcanic activity of Mt. Karacadaĝ (SE Anatolia) is divided into three major stages: Siverek Stage (∼11-2.7Ma), Karacadaĝ Stage (∼1.9-1.0Ma) and Ovabaĝ Stage (0.4-0.01Ma). The magmas are mildly alkaline mafic rocks, mostly basanites, hawaiites and alkali basalts. Detailed geochemical investigation indicates a continuous variation of composition with time, with the oldest products (Siverek Stage) being characterized by average lowest HFSE (Ti, Hf, Zr, Nb, Ta), 143Nd/ 144Nd, Nb/U, Ta/Yb, Nb/Nb and the highest ΔQ, La/Nb, Ti/Nb, Zr/Nb, Ba/Nb, Th/Ta, K/La, and the youngest products (Ovabaĝ Stage) at the opposite end of the trend. The overall incompatible element content of the Karacadaĝ volcanic rocks resembles closely average HIMU-OIB compositions, with the oldest samples deviating more strongly from typical compositions of {"}anorogenic{"} magmas. We interpret these geochemical variations with a process of partial melting of a chemically and mineralogically heterogeneous mantle source rather than with process of variable crustal contamination at shallow depths. During the first stages of mantle melting the volumes with lowest solidus temperature (e.g., the amphibole and phlogopite-rich metasomes, particularly abundant in the Arabia mantle xenolith suite) contributed significantly to the partial melts. {"}Average{"} peridotitic matrix is involved in partial melting processes only when these metasomatic volumes start to be exhausted, producing mantle melts with geochemical composition resembling average {"}anorogenic{"} mildly alkaline sodic rocks, common in the circum-Mediterranean area.",

keywords = "Anatolia, Arabia, Basalt, Geochemistry, Mantle, Petrology, Turkey",

author = "Michele Lustrino and Mehmet Keskin and Michele Mattioli and Orhan Kavak",

year = "2012",

month = mar,

day = "2",

doi = "10.1016/j.jseaes.2011.11.016",

language = "English",

volume = "46",

pages = "120--139",

journal = "Journal of Asian Earth Sciences",

issn = "1367-9120",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Heterogeneous mantle sources feeding the volcanic activity of Mt. Karacadaĝ (SE Turkey)

AU - Lustrino, Michele

AU - Keskin, Mehmet

AU - Mattioli, Michele

AU - Kavak, Orhan

PY - 2012/3/2

Y1 - 2012/3/2

N2 - The volcanic activity of Mt. Karacadaĝ (SE Anatolia) is divided into three major stages: Siverek Stage (∼11-2.7Ma), Karacadaĝ Stage (∼1.9-1.0Ma) and Ovabaĝ Stage (0.4-0.01Ma). The magmas are mildly alkaline mafic rocks, mostly basanites, hawaiites and alkali basalts. Detailed geochemical investigation indicates a continuous variation of composition with time, with the oldest products (Siverek Stage) being characterized by average lowest HFSE (Ti, Hf, Zr, Nb, Ta), 143Nd/ 144Nd, Nb/U, Ta/Yb, Nb/Nb and the highest ΔQ, La/Nb, Ti/Nb, Zr/Nb, Ba/Nb, Th/Ta, K/La, and the youngest products (Ovabaĝ Stage) at the opposite end of the trend. The overall incompatible element content of the Karacadaĝ volcanic rocks resembles closely average HIMU-OIB compositions, with the oldest samples deviating more strongly from typical compositions of "anorogenic" magmas. We interpret these geochemical variations with a process of partial melting of a chemically and mineralogically heterogeneous mantle source rather than with process of variable crustal contamination at shallow depths. During the first stages of mantle melting the volumes with lowest solidus temperature (e.g., the amphibole and phlogopite-rich metasomes, particularly abundant in the Arabia mantle xenolith suite) contributed significantly to the partial melts. "Average" peridotitic matrix is involved in partial melting processes only when these metasomatic volumes start to be exhausted, producing mantle melts with geochemical composition resembling average "anorogenic" mildly alkaline sodic rocks, common in the circum-Mediterranean area.

AB - The volcanic activity of Mt. Karacadaĝ (SE Anatolia) is divided into three major stages: Siverek Stage (∼11-2.7Ma), Karacadaĝ Stage (∼1.9-1.0Ma) and Ovabaĝ Stage (0.4-0.01Ma). The magmas are mildly alkaline mafic rocks, mostly basanites, hawaiites and alkali basalts. Detailed geochemical investigation indicates a continuous variation of composition with time, with the oldest products (Siverek Stage) being characterized by average lowest HFSE (Ti, Hf, Zr, Nb, Ta), 143Nd/ 144Nd, Nb/U, Ta/Yb, Nb/Nb and the highest ΔQ, La/Nb, Ti/Nb, Zr/Nb, Ba/Nb, Th/Ta, K/La, and the youngest products (Ovabaĝ Stage) at the opposite end of the trend. The overall incompatible element content of the Karacadaĝ volcanic rocks resembles closely average HIMU-OIB compositions, with the oldest samples deviating more strongly from typical compositions of "anorogenic" magmas. We interpret these geochemical variations with a process of partial melting of a chemically and mineralogically heterogeneous mantle source rather than with process of variable crustal contamination at shallow depths. During the first stages of mantle melting the volumes with lowest solidus temperature (e.g., the amphibole and phlogopite-rich metasomes, particularly abundant in the Arabia mantle xenolith suite) contributed significantly to the partial melts. "Average" peridotitic matrix is involved in partial melting processes only when these metasomatic volumes start to be exhausted, producing mantle melts with geochemical composition resembling average "anorogenic" mildly alkaline sodic rocks, common in the circum-Mediterranean area.

KW - Anatolia

KW - Arabia

KW - Basalt

KW - Geochemistry

KW - Mantle

KW - Petrology

KW - Turkey

UR - http://www.scopus.com/inward/record.url?scp=84856342398&partnerID=8YFLogxK

U2 - 10.1016/j.jseaes.2011.11.016

DO - 10.1016/j.jseaes.2011.11.016

M3 - Article

AN - SCOPUS:84856342398

SN - 1367-9120

VL - 46

SP - 120

EP - 139

JO - Journal of Asian Earth Sciences

JF - Journal of Asian Earth Sciences

ER -

Heterogeneous mantle sources feeding the volcanic activity of Mt. Karacadaĝ (SE Turkey)

Abstract

Funding

Keywords

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this