Petrology of the Jurassic Shah-Kuh granite (eastern Iran), with reference to tin mineralization

Esmaeily, Dariush; Nédélec, Anne; Valizadeh, M V; Moore, Farid; Cotten, Joseph

doi:10.1016/j.jseaes.2004.09.003

Cited by 56 publications

(26 citation statements)

References 51 publications

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“…These evolved peraluminous granites are thought to be the chief source of tin mineralization. They typically contain muscovite, garnet, topaz, and tourmaline, and possess low ε Nd (T) values (<0) and high initial 87 Sr/ 86 Sr ratios (Linnen, 1998;Yokart et al, 2003;Esmaeily et al, 2005). In contrast, the alkaline granites of this study are peralkaline with an A-type affinity, and have high ε Nd (T) values between +5.9 and +6.5: they are quite different from "typical" stanniferous granites with S-type affinities.…”

Section: Org-ocean Ridge Granites Vag-volcanic Arc Granites Syn-cmentioning

confidence: 63%

Petrogenesis of Karamaili alkaline A-type granites from East Junggar, Xinjiang (NW China) and their relationship with tin mineralization

Tang

Sylvester

et al. 2007

Geochem. J.

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Several types of granites including alkaline granites and alkali feldspar granites are distributed in the Karamaili tectonic belt of East Junggar, Xinjiang, China. Some medium-small tin deposits are located within or near the contact zones of the granitic intrusions. The alkaline granites share all the features commonly observed in peralkaline A-type granites. They contain alkalic mafic minerals such as riebeckite and aegirine; have high contents of SiO 2 , alkalis, Rb, Th, Zr, Hf, REE (except Eu), and high ratios of FeO*/MgO and Ga/Al; and show strong depletions in Ba, Sr, Eu in the spidergrams. Laser ablation-ICPMS U-Pb zircon geochronology indicates a crystallization age of ca. 305 Ma for the granites; TIMS analyses of the granites found high ε Nd (T) values of +5.9 to +6.5. Considering their geochemical features, alkaline granites most likely formed by fractional crystallization of granodioritic magmas, which were probably produced by partial melting of lower crustal basaltic to andesitic rocks formed from oceanic crustal materials that were deeply buried during late Paleozoic subduction and accretion. Six molybdenite samples from the Sareshike tin deposit in East Junggar yielded an isochron age of 307 ± 11 Ma (2σ) and a weighted mean model age of 306.5 ± 3.4 Ma, consistent with zircon U-Pb ages of the alkaline granites. Low Re contents (0.323-0.961 ppm) in the molybdenite suggest that they originated from crustal sources related to the alkaline granites. Considering their identical ages, close spatial distribution, and similar sources, we argue that the A-type granites have a genetic relationship with the tin mineralization, and that the same association may be important elsewhere.

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Section: Org-ocean Ridge Granites Vag-volcanic Arc Granites Syn-cmentioning

confidence: 63%

Petrogenesis of Karamaili alkaline A-type granites from East Junggar, Xinjiang (NW China) and their relationship with tin mineralization

Tang

Sylvester

et al. 2007

Geochem. J.

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“…Lut block (Esmaeily et al, 2005;Mahmoodi et al, 2010;Arjmandzadeh et al, 2011;Zarrinkoub et al, 2012). There is also ample evidence emphasizing eastward subduction under the Afghan block (Camp and Griffis, 1982;Tirrul et al, 1983;Fotoohi Rad et al, 2005;Saccani et al, 2010;Angiboust et al, 2013).…”

Section: U R U M I E H -D O K H T a R V O L C A N O -P L U T O N I C mentioning

confidence: 99%

“…The Shah Kuh granitoid, dated at about 162 Ma (Esmaeily et al, 2005), also crops out in the central part of the Lut block (Figure 1a). Conversely, most of the Cretaceous magmatism observed in submarine deposits is associated with the ophiolitic assemblage emplaced in the accretionary prisms and tectonic mélanges occurring BZ-2 BZ-3 BZ-7 Figure 13.…”

Section: Geotectonic Considerationsmentioning

confidence: 99%

Geochemistry, zircon U-Pb age, and tectonic constraints on the Bazman granitoid complex, southeast Iran

Boomeri¹,

Bagheri²,

Ishiyama³

et al. 2016

Turkish J Earth Sci

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The Bazman granitoid complex (BGC), including a large zoned pluton, intrudes into the upper Paleozoic sedimentary cover of the Lut block. It crops out on the southern slope of the Bazman volcano in Baluchestan Province of Iran. The intrusive rocks range from gabbro to various metaluminous to weakly peraluminous granites, and they are classified as I-type magmatic series. They display geochemical characteristics of typical volcanic arc magmatism at continental margins. Major-and trace-element variation diagrams show that fractional crystallization was the major process and crustal contamination, a subordinate process during the evolution of the BGC. The decrease in CaO, MgO, Al 2 O 3 , Fe 2 O 3 , TiO 2 , P 2 O 5 , and Sr, as well as the increase of K 2 O and Rb with increasing silica, are possibly related to the fractionation of plagioclase, hornblende, apatite, and titanite, whereas the increasing K, Rb, Cs, Pb, and light rare earth elements (LREEs) can be explained by crustal contamination. The BGC rocks are enriched by large ion lithophile elements (e.g., Rb, K, Cs) and the LREEs with respect to the high field strength elements (e.g., Zr, Hf, Nb, Ta, Y) and heavy rare earth elements. New ID-TIMS U-Pb dating performed on zircon and titanite extracted from the granitic samples indicates that the BGC was emplaced during the late Cretaceous period at 83-72 Ma by subduction of the Neo-Tethyan oceanic crust beneath the Eurasian continent. Subsequently, the complex became part of the Lut block when it probably rotated counter-clockwise with respect to the Sanandaj-Sirjan zone and the Urumieh-Dokhtar volcano-plutonic belt.

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“…1 Modified geological sketch map of Iran after Berberian and King (1981). The point indicates the location of Dehsalm intrusives, and the box indicates the location of the Lut Block volcanic-plutonic belt flows, volcaniclastic rocks and subvolcanic and plutonic bodies, started in the late Jurassic with the intrusion of ShahKuh batholith and continued into the Quaternary (Esmaeily 2005). Most of the East Iran mineral deposits are related to the Tertiary magmatism (Arjmandzadeh et al 2013).…”

Section: Geological Setting and Mineralizationmentioning

confidence: 99%

Sr–Nd isotope geochemistry and tectonomagmatic setting of the Dehsalm Cu–Mo porphyry mineralizing intrusives from Lut Block, eastern Iran

Arjmandzadeh

Santos

2013

Int J Earth Sci (Geol Rundsch)

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The Dehsalm Cu-Mo-bearing porphyritic granitoids belong to the Lut Block volcanic-plutonic belt (central eastern Iran). These rocks range in composition from gabbro-diorite to granite, with dominance of monzonites and quartz monzonites, and have geochemical features of high-K calc-alkaline to shoshonitic volcanic arc suites. Primitive mantle-normalized trace element spider diagrams display strong enrichment in large-ion lithophile elements such as Rb, Ba and Cs and depletions in some high-field strength elements, e.g., Nb, Ti, Y and HREE. Chondrite-normalized plots display significant LREE enrichments, high La N /Yb N and a lack of Eu anomaly. High Sr/Y and La/Yb ratios of Dehsalm intrusives reveal that, despite their K-rich composition, these granitoids show some resemblances with adakitic rocks. A Rb-Sr whole rock-feldspar-biotite age of 33 ± 1 Ma was obtained in a quartz monzonite sample and coincides, within error, with a previous geochronological result in Chah-Shaljami granitoids, further northwest within the Lut Block. ( 87 Sr/ 86 Sr) i and eNd i isotopic ratios range from 0.70481 to 0.70508 and from

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Petrology of the Jurassic Shah-Kuh granite (eastern Iran), with reference to tin mineralization

Cited by 56 publications

References 51 publications

Petrogenesis of Karamaili alkaline A-type granites from East Junggar, Xinjiang (NW China) and their relationship with tin mineralization

Petrogenesis of Karamaili alkaline A-type granites from East Junggar, Xinjiang (NW China) and their relationship with tin mineralization

Geochemistry, zircon U-Pb age, and tectonic constraints on the Bazman granitoid complex, southeast Iran

Sr–Nd isotope geochemistry and tectonomagmatic setting of the Dehsalm Cu–Mo porphyry mineralizing intrusives from Lut Block, eastern Iran

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