Peraluminous I-type granites

Chappell, B. W.; Bryant, Colleen J.; Wyborn, D.

doi:10.1016/j.lithos.2012.07.008

Cited by 403 publications

(118 citation statements)

References 52 publications

(86 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Based on the compositional similarity between migmatitic leucosomes and crosscutting granites we believe that the granites are a result of in situ melting of mafic to intermediate igneous protoliths under specific melting conditions during crustal thickening as discussed for peraluminous I-type granites (cf. Chappell et al, 2012). A similar protolithdependent origin was already suggested for several magmatic post-collisional granite series in the Tien Shan .…”

Section: Nd Isotopic Compositions Of the Garm Rockssupporting

confidence: 68%

See 1 more Smart Citation

Permian age of orogenic thickening and crustal melting in the Garm Block, South Tien Shan, Tajikistan

Konopelko

Klemd

Mamadjanov

et al. 2015

Journal of Asian Earth Sciences

View full text Add to dashboard Cite

Section: Nd Isotopic Compositions Of the Garm Rockssupporting

confidence: 68%

“…5). They may be classified as peraluminous I-type granites similar to those described in the Lachlan Fold Belt representing an active continental magmatic arc environment (Chappell et al, 2012 and references therein).…”

Section: Geochemistry Of Granitoid Rocks In the Garm Blockmentioning

confidence: 99%

Permian age of orogenic thickening and crustal melting in the Garm Block, South Tien Shan, Tajikistan

Konopelko

Klemd

Mamadjanov

et al. 2015

Journal of Asian Earth Sciences

View full text Add to dashboard Cite

“…The Early Jurassic intrusive rocks in the Helong area are dominated by granitoids, with only minor mafic–intermediate lithologies. It is possible for granitoid melts to be formed by fractional crystallization of basaltic magmas, but the volume problem works against this as a possible means for the production of widespread and volumetrically significant granitoids (Chappell, Bryant, & Wyborn, ; Zen, ). The high SiO 2 and Al 2 O 3 and low MgO and TFe 2 O 3 concentrations of the Early Jurassic granitoids, together with their high‐K calc‐alkaline characteristics, LREE and LILE enrichment, and HREE and HFSE depletion (Figure c), suggest that these rocks were derived from parental magma generated by the partial melting of lower crustal material (Xu et al, ).…”

Section: Discussionmentioning

confidence: 99%

Geochronology and geochemistry of late Carboniferous–Middle Jurassic magmatism in the Helong area, NE China: Implications for the tectonic transition from the Paleo‐Asian oceanic to circum‐Pacific regime

Tang

2019

Geological Journal

View full text Add to dashboard Cite

In this study, we present new U–Pb zircon ages and whole‐rock major and trace element data for the late Carboniferous–Middle Jurassic intrusive rocks in the Helong area, NE China. These data constrain the timing of tectonic transition from the Paleo‐Asian oceanic regime to the circum‐Pacific regime. U–Pb zircon dating indicates that the late Carboniferous–Middle Jurassic magmatic events in the Helong area can be subdivided into late Carboniferous, middle Permian, Early–Middle Triassic, Late Triassic, Early Jurassic, and early Middle Jurassic. The late Carboniferous granodiorites and middle Permian monzogranites belong to the calc‐alkaline series and have an affinity to I‐type granitoids, suggesting that they formed in a typical Andean‐type continental arc setting due to the southward subduction of the Paleo‐Asian oceanic plate beneath the NCC. The Middle Triassic granodiorites and monzogranites in the Helong area exhibit an affinity to adakitic rocks with their parental magma derived by the partial melting of thickened lower continental crust. The Late Triassic I‐type monzogranites and coeval ultramafic–mafic rocks constitute a bimodal igneous rock association, together with coeval A‐type granites and rhyolites, signifying an extensional environment. Combined with the absence of 240‐ to 225‐Ma sedimentation, the study area experienced a change from Early–Middle Triassic compression to Late Triassic extension related to the final closure of the Paleo‐Asian Ocean. The Early–early Middle Jurassic gabbros, diorites, granodiorites, and monzogranites are calc‐alkaline in nature and enriched in LREE and LILE but depleted in HREE and HFSE. Combined with the spatial variations in K contents of Early Jurassic igneous rocks in NE China from the continental margin to intracontinental region, and the presence of an Early Jurassic accretionary complex, we suggest that Early–early Middle Jurassic magmatism in the Helong area formed in an active continental margin setting related to the subduction of the Paleo‐Pacific Plate beneath Eurasia. We conclude that the tectonic transition from the Paleo‐Asian oceanic regime to the circum‐Pacific regime occurred in the Late Triassic–Early Jurassic.

show abstract

“…The issue on the classification of the granitic rocks has been a hot topic for decades, and many types of granitic rocks are proposed based on the different standards, among which the classification of I-, S-, M-, and A-type granite are well accepted all over the world [41][42][43][44][45][46][47][48][49][50][51]. The term of A-type granite was first proposed by [45] and defined by their alkaline, anhydrous and anorogenic nature.…”

Section: Genetic Type Of the Granitic Rocks: An A-type Affinitymentioning

confidence: 99%

Geochronology, Petrology, and Genesis of Two Granitic Plutons of the Xianghualing Ore Field in South Hunan Province: Constraints from Zircon U–Pb Dating, Geochemistry, and Lu–Hf Isotopic Compositions

Yang

Cao

et al. 2018

Minerals

View full text Add to dashboard Cite

Two small-sized granitic plutons, outcropped in Xianghualing ore field, South Hunan (South China), have a close relationship with the super large-scale Sn-W polymetallic mineralization in this ore field. The Laiziling and Jianfengling plutons are composed of medium-to coarse-grained two-mica and coarse-grained biotite granites, respectively, and have zircon U-Pb ages of 156.4 ± 1.4 Ma and 165.2 ± 1.4 Ma, respectively. Both of the Laiziling and Jianfengling granites are characterized by extremely similar elemental and Lu-Hf isotopic compositions with high contents of SiO 2 , Al 2 O 3 , Na 2 O, K 2 O, high A/CNK ratios, negative ε Hf (t) values (ranging from −3.86 to −1.38 and from −5.44 to −3.71, respectively), and old T DMC ages (ranging from 1.30 to 1.47 Ga and from 1.32 to 1.56 Ga, respectively). These features indicate that they both belong to highly fractionated A-type granites, and were formed in an extensional setting and from the same magma chamber originated from the Paleoproterozoic metamorphic basement of South China with a certain amount of mantle-derived magma involved with temperatures of ca. 730 • C and low oxygen fugacity.

show abstract

Peraluminous I-type granites

Cited by 403 publications

References 52 publications

Permian age of orogenic thickening and crustal melting in the Garm Block, South Tien Shan, Tajikistan

Permian age of orogenic thickening and crustal melting in the Garm Block, South Tien Shan, Tajikistan

Geochronology and geochemistry of late Carboniferous–Middle Jurassic magmatism in the Helong area, NE China: Implications for the tectonic transition from the Paleo‐Asian oceanic to circum‐Pacific regime

Geochronology, Petrology, and Genesis of Two Granitic Plutons of the Xianghualing Ore Field in South Hunan Province: Constraints from Zircon U–Pb Dating, Geochemistry, and Lu–Hf Isotopic Compositions

Contact Info

Product

Resources

About