Magma mixing/mingling in the Eocene Horoz (Nigde) granitoids, Central southern Turkey: evidence from mafic microgranular enclaves

Koçak, Kerim; Zedef, Veysel; Kansun, Gürsel

doi:10.1007/s00710-011-0165-7

Cited by 57 publications

(30 citation statements)

References 70 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The needle‐shaped apatite crystals in the MME also suggest an undercooling, which might be due to magma mingling. The occurrence of exotic plagioclase in the MMEs results from the transference of minerals crystallized in the granitic magma to the MME during their mingling (Kocak, Zedef, & Kansun, ; Pesquera & Pons, ). The MMEs display pyrocrystalline texture, a similar primitive‐mantle normalization trace elements spidergram and chondrite‐normalization REE pattern to the host granite, ruling out being a restite of the source rocks or wall rock xenoliths.…”

Section: Discussionmentioning

confidence: 99%

Origin and influence of a Late Mesozoic multistage I‐ and A‐type granitic complex in northern Fujian Province, South China

et al. 2018

View full text Add to dashboard Cite

The Late Mesozoic Pucheng granitic complex in northern Fujian Province is composed of the Chengbu and Shipi peralkaline A-type granitoids, the Pucheng A-type granitoid, and the Yongxing I-type granitoid. The Chengbu and Shipi peralkaline granitoids were dated at 160 and 130 Ma, respectively, and are explained by the melting of meta-igneous rocks with T DM 2 of 1.70 Ga and 2.01 to 2.05 Ga. The Pucheng A-type granitoid was emplaced at 110 and 102 Ma and is divided into two groups. Group 1 comprises the extremely felsic A-type granite (SiO 2 > 73 wt.%), high FeO T /MgO (>16), and low Ga/Al ratios and Zr + Nb + Ce + Y content. Group 2 contains a lessevolved A-type granite with high Zr + Nb + Ce + Y content. Both groups can be explained by dehydration melting of meta-igneous rocks at low pressure. The diversity between the two groups was caused by different physicochemical environments. The Yongxing I-type granite, which is abundant in mafic microgranular enclaves, was emplaced at 106 ± 1 Ma. It can be explained by the mingling of mantle-derived and crustal-derived magmas. Our data along with previously published data demonstrate that the northern Fujian Province was under an extensional environment from 160 to 100 Ma. This was caused by the NW-trending subduction of the palaeo-Pacific Plate. The Jurassic peralkaline granitoids were probably generated in a rift environment as a result of the reactivation of pre-existing faults caused by the initial subduction of the palaeo-Pacific Plate. The Early Cretaceous peralkaline granitoids may represent a rift environment as a tectonic response from low-angle subduction to an increasing subduction dip angle. The 100 Ma granitoids derive from an intraplate extensional environment caused by the roll-back of the palaeo-Pacific Plate.

show abstract

Section: Discussionmentioning

confidence: 99%

Origin and influence of a Late Mesozoic multistage I‐ and A‐type granitic complex in northern Fujian Province, South China

et al. 2018

View full text Add to dashboard Cite

show abstract

“…2b, d). MME is one of the three common enclaves (xenolith, relict and mafic microgranular enclave) and is regarded as a direct evidence for magma mixing and mingling (Perugini and Poli, 2003;Barbarin et al, 2005;Kocak et al, 2011). The dating result of the MME sample from granodiorite is 273 ± 2 Ma, which is coeval with its host rock (283-270 Ma), excluding the possibility of xenolith and relict.…”

Section: Generation Of Intermediate-felsic Rocksmentioning

confidence: 93%

Elemental and Sr–Nd isotopic geochemistry of the Uradzhongqi magmatic complex in western Inner Mongolia, China: A record of early Permian post-collisional magmatism

Qiao

Zhong

et al. 2017

Journal of Asian Earth Sciences

View full text Add to dashboard Cite

“…(1) The presence of abundant MMEs with igneous microtextures advocates a magmatic origin resulting from interactions between basic and acid magmas (Perugini et al, 2003;Mo et al, 2002;Gerdes et al, 2000;Poli et al, 1996;Poli, 1992;Didier and Barbarin, 1991;Didier, 1987Didier, , 1984Holden et al, 1987;Vernon, 1984;Didier and Renouf, 1973), rather than cognate fragments of cumulates or refractory "restite" produced from dehydration melting (Karsli et al, 2012;Kocak et al, 2011). Furthermore, the presence of long prismatic-acicular apatite crystals within the MMEs suggests rapid cooling in a quenched magma, resulting from the incomplete mixing of small mafic magma blobs interacting with cooler acidic melts (Tang et al, 2012;Yang et al, 2006;Bonin, 2004;Barbarin and Didier, 1992;Hibbard, 1991;Wyllie et al, 1962).…”

Section: Mineralogical Evidence For Magma Mixingmentioning

confidence: 97%

“…5). The compositional similarities between the host rocks and the MMEs imply that the host rocks were equilibrated with the MMEs (Kocak et al, 2011). Meanwhile, it cannot be ruled out the possibility that the dioritic magma might trap the early crystallized plagioclase from the host magma during the mingling and/or mixing process.…”

Section: Plagioclasementioning

confidence: 99%

Mineral chemistry and crystallization conditions of the Late Cretaceous Mamba pluton from the eastern Gangdese, Southern Tibetan Plateau

Scheltens

et al. 2016

J. Earth Sci.

View full text Add to dashboard Cite

The Late Cretaceous Mamba granodiorite belongs to a part of the Mesozoic Gangdese continental magmatic belt. No quantitative mineralogical study has been made hitherto, and hence the depth at which it formed is poorly constrained. Here we present mineralogical data for the Mamba pluton, including host rocks and their mafic microgranular enclaves (MMEs), to provide insights into their overall crystallization conditions and information about magma mixing. All amphiboles in the Mamba pluton are calcic, with B (Ca+Na)>1.5, and Si=6.81-7.42 apfu for the host rocks and Si=6.77-7.35 apfu for the MMEs. The paramount cation substitutions in amphibole include edenite type and tschermakite type. Biotites both in the host rocks and the MMEs collectively have high MgO (13.19 wt.%-13.03 wt.%) contents, but define a narrow range of Al apfu (atoms per formula unit) variations (2.44-2.57). The oxygen fugacity estimates are based on the biotite compositions cluster around the NNO buffer. The calculated pressure ranges from 1.2 to 2.1 kbar according to the aluminum-in-hornblende barometer. The computed pressure varies from 0.9 to 1.3 kbar based on the aluminum-in-biotite barometer which corresponds to an average depth of ca. 3.9 km. Besides, the estimates of crystallization pressures vary from 0.8 to 1.4 kbar based on the amphibole barometer proposed by Ridolfi et al. (2010), which can be equivalent to the depths ranging from 3.1 to 5.2 km. The MMEs have plagioclase oscillatory zonings and quartz aggregates, probably indicating the presence of magma mixing. Besides, core-to-rim element variations (Rb, Sr, Ba, and P) for the K-feldspar megacrysts serve as robust evidence to support magma mixing and crystal fractionation. This indicates the significance of the magma mixing that contributes to the formation of K-feldspar megacryst zonings in the Mamba pluton. KEY WORDS: Mamba pluton, Gangdese terrane, MMEs, K-feldspar megacrysts, magma mixing, P-T conditions, oxygen fugacity, in-situ trace element. INTRODUCTIONPrevious studies have demonstrated that the composition and structure of feldspar, biotite and amphibole in felsic rocks can serve as ideal proxies for physico-chemical conditions of magmas, such as crystallization and emplacement temperature, pressure, oxygen fugacity, water activity and compositional variations (Ayati et al.

show abstract

Magma mixing/mingling in the Eocene Horoz (Nigde) granitoids, Central southern Turkey: evidence from mafic microgranular enclaves

Cited by 57 publications

References 70 publications

Origin and influence of a Late Mesozoic multistage I‐ and A‐type granitic complex in northern Fujian Province, South China

Origin and influence of a Late Mesozoic multistage I‐ and A‐type granitic complex in northern Fujian Province, South China

Elemental and Sr–Nd isotopic geochemistry of the Uradzhongqi magmatic complex in western Inner Mongolia, China: A record of early Permian post-collisional magmatism

Mineral chemistry and crystallization conditions of the Late Cretaceous Mamba pluton from the eastern Gangdese, Southern Tibetan Plateau

Contact Info

Product

Resources

About