Magma mixing origin for the Aolunhua porphyry related to Mo–Cu mineralization, eastern Central Asian Orogenic Belt

Ma, Xinghua; Chen, Bin; Yang, Mingchun

doi:10.1016/j.gr.2013.02.010

Cited by 67 publications

(24 citation statements)

References 117 publications

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“…In addition, the available petrographical observations, significant LILE and LREE enrichment, and enriched Sr‐Nd‐Hf isotopic compositions require a volatile‐rich, K 2 O‐rich, and isotopically enriched mantle source (cf. Guo et al, ; Lu et al, ; Ma et al, ; Yang et al, ).…”

Section: Discussionmentioning

confidence: 99%

Magma Mixing in a Granite and Related Rock Association: Insight From Its Mineralogical, Petrochemical, and “Reversed Isotope” Features

Jiang

Xia

et al. 2018

JGR Solid Earth

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Magma mixing commonly takes place between isotopically depleted mafic and enriched felsic magmas. Here we present isotopic evidence exhibiting the opposite behavior in the Early Cretaceous Siling complex (south China), which is composed of gabbro, quartz diorite, granodiorite, and alkali feldspar granite with locally many mafic microgranular enclaves. Field observations and zircon U‐Pb dating indicate that all of the rock units crystallized contemporaneously at ca. 127–129 Ma. Mineralogical and petrochemical analyses indicate that the Siling quartz diorite and granodiorite crystallized from hybrid magmas of temporally and spatially coexisting gabbroic and granitic melts. The Siling gabbro, characterized by variable yet enriched Sr‐Nd‐Hf isotopic compositions [(87Sr/86Sr)i = 0.70788 to 0.70833; ɛNd(t) = −7.6 to −3.5; ɛHf(t) = −6.8 to −1.9], exhibits Th/Nb, Nb/Nb*, and Sm/Yb versus εNd(t) correlations, indicating that the gabbro represents variable mixing of magmas derived from deep‐level pyroxenite and shallow‐level peridotite sources. The Siling alkali feldspar granite, which has typical A‐type characteristics, exhibits less enriched Sr‐Nd‐Hf isotopic signatures [(87Sr/86Sr)i = 0.70650; εNd(t) = −3.2 to −2.5; ɛHf(t) = −1.3] than the coexisting gabbro, indicating its derivation from the remelting of juvenile lower crust. “Reversed isotope” feature of the Siling gabbro and alkali feldspar granite means that the quartz diorite and granodiorite recorded “reversed isotope” mixing between isotopically enriched mafic and relatively depleted felsic magmas. The results indicate that the injection of mantle‐derived mafic magma does not necessarily imprint relatively depleted isotopic signatures on the host felsic melt and that the vertical growth of the continental crust by the input of isotopically enriched magma should be concerned.

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Section: Discussionmentioning

confidence: 99%

Magma Mixing in a Granite and Related Rock Association: Insight From Its Mineralogical, Petrochemical, and “Reversed Isotope” Features

Jiang

Xia

et al. 2018

JGR Solid Earth

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“…Genesis of porphyry deposits (Cu, Mo) is generally associated with high water content, sulfur-rich, and high oxygen fugacity (fO 2 ) (Oyarzun et al, 2001;Ballard et al, 2002;Mungall, 2002;Ma et al, 2013). Chalcophile and siderophile elements are mainly sequestered in mantle sulfides (Fleet et al, 1996;Sillitoe, 1997;Ballard et al, 2002;Mungall, 2002).…”

Section: Implications For Cu-mo Mineralizationmentioning

confidence: 99%

SIMS zircon U–Pb and molybdenite Re–Os geochronology, Hf isotope, and whole-rock geochemistry of the Wunugetushan porphyry Cu–Mo deposit and granitoids in NE China and their geological significance

Wang

Chun-bo²,

Zhang

et al. 2015

Gondwana Research

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“…Since no arc magma remnants has been found in the MLYB, the possibility of the H 2 O-enriched magma being derived from hydrated mineral (e.g., hornblende) destruction or arc magma remnants may be excluded. Recent studies have revealed that the mixing with a mafic magmas generated from enriched lithospheric mantle may make the porphyry system rich in H 2 O (e.g.,; Ma et al, 2013;Xu Fig. 19.…”

Section: Deep Seated Processesmentioning

confidence: 99%

“…Besides, felsic magmas normally contain lower S and metals (Wallace and Carmichael, 1992;Hattori and Keith, 2001;Mungall, 2002). Thus, S and metals cannot be supplied sufficiently by partial melting of the lower crust alone (e.g., Cu, Au) for ore formation, yet mixing with or underplating of mafic magmas may supply these ore-forming materials (Hou et al, 2013b), as demonstrated in many famous porphyry deposits in the world, e.g., Bingham (Hattori, 1993;Keith et al, 1997;Hattori and Keith, 2001) and in China, e.g., Deqin (Hou et al, 2013b) and Aolunhua (Ma et al, 2013).…”

Section: Deep Seated Processesmentioning

confidence: 99%

A review of the intracontinental porphyry deposits in the Middle-Lower Yangtze River Valley metallogenic belt, Eastern China

Zhou

Wang

Yang

et al. 2015

Ore Geology Reviews

168

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Magma mixing origin for the Aolunhua porphyry related to Mo–Cu mineralization, eastern Central Asian Orogenic Belt

Cited by 67 publications

References 117 publications

Magma Mixing in a Granite and Related Rock Association: Insight From Its Mineralogical, Petrochemical, and “Reversed Isotope” Features

Magma Mixing in a Granite and Related Rock Association: Insight From Its Mineralogical, Petrochemical, and “Reversed Isotope” Features

SIMS zircon U–Pb and molybdenite Re–Os geochronology, Hf isotope, and whole-rock geochemistry of the Wunugetushan porphyry Cu–Mo deposit and granitoids in NE China and their geological significance

A review of the intracontinental porphyry deposits in the Middle-Lower Yangtze River Valley metallogenic belt, Eastern China

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