Geochemistry, Sr–Nd–Pb–Hf isotopes systematics and geochronological constrains on petrogenesis of the Xishan A-type granite and associated W–Sn mineralization in Guangdong Province, South China

Zheng, Wei; Mao, Jingwen; Zhao, Hongying; Ouyang, Hegen; Zhao, Chao; Yu, Xiaofei

doi:10.1016/j.oregeorev.2016.12.021

Cited by 33 publications

(12 citation statements)

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“…The different Re and Os geochemical characteristics make the Re–Os isotope system a sensitive tracer for the source of ore‐forming materials, especially the metal components in Mo‐bearing deposits (Stein et al, ; Mao et al, ; Wang et al, ; Zheng et al, ). Mao et al () suggested that the Re contents in molybdenite increase from a crust source via mixtures between mantle and crust to mantle.…”

Section: Discussionmentioning

confidence: 99%

Geochronological and Geochemical Constraints on the Petrogenesis and Geodynamic Setting of the Daheishan Porphyry Mo Deposit, Northeast China

Zheng

2017

Resource Geology

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The Daheishan Mo deposit of the Lesser Xing'an-Zhangguangcai Range metallogenic belt in northeast China is a super-large molybdenum deposit with Mo reserves of 1.09 Mt. The Mo mineralization occurs mainly in a granodiorite porphyry. Zircon SIMS U-Pb dating yields a crystallization age of 168.3 ± 1.4 Ma for the granodiorite porphyry. Molybdenite Re-Os dating indicates that Mo mineralization occurred at 169.2 ± 1.2 Ma. These geochronological data indicate that these magmatic and hydrothermal activities occurred during the Middle Jurassic. The granodiorite porphyry can be classified as high-K calc-alkaline series, and the rare earth elements (REE) are characterized by a significant fractionation between light REE (LREE) and heavy REE (HREE) with slightly positive Eu anomalies (Eu/Eu * = 1.08-1.12). Large ion lithophile elements (e.g., Rb, U, K, and Pb) are enriched, whereas high field strength elements (e.g., Nb, Ta, Ti, HREEs, and Yb) are strongly depleted. The granodiorite porphyry is also characterized by initial strontium isotope ratios ( 87 Sr/ 86 Sr) i of 0.70460-0.70482 and magmatic zircon δ 18 O values of 5.2-6.5 ‰ that are similar to those of the mantle. Zircon ɛ Hf (t) and whole-rock ε Nd (t) values range from 5.6 to 9.9 and 0.8 to 1.1, respectively. The two-stage Nd model ages (T DM2 ) are in the range of 868-894 Ma, similar to Hf model ages, indicating that the parent magma has a uniform source and primarily originated from a juvenile crustal source. Combined with the regional geological history, geochemistry of the Daheishan granodiorite porphyry, and new isotopic age data, we propose that the formation of the Daheishan porphyry Mo deposit is likely related to the subduction of the Paleo-Pacific Plate.

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Section: Discussionmentioning

confidence: 99%

Geochronological and Geochemical Constraints on the Petrogenesis and Geodynamic Setting of the Daheishan Porphyry Mo Deposit, Northeast China

Zheng

2017

Resource Geology

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“…Sr, Eu, and Ba are all highly compatible within plagioclase and K-feldspar, with depletions in these elements (Figure 6e,f), indicating fractional crystallization of these minerals. The presence of negative P and Ti anomalies also implies fractional crystallization of P and Ti-bearing minerals such as apatite, rutile, and ilmenite (Zheng, Mao, Zhao, Ouyang, et al, 2017 9c). In contrast, the WB porphyritic granite and YZGN K-feldspar granite samples all plot in the metagreywacke source field (Figure 9c), which is consistent with their peraluminous characteristics (Kaygusuz, Siebel, Sen, & Satir, 2008) [Colour figure can be viewed at wileyonlinelibrary.com] (Figure 5c).…”

Section: Late Triassic Granitoidsmentioning

confidence: 99%

Middle to Late Triassic granitic magmatism in the East Kunlun Orogenic Belt, NW China: Petrogenesis and implications for a transition from subduction to post‐collision setting of the Palaeo‐Tethys Ocean

Gao

Sun

2021

Geological Journal

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In this study, we present new geochronological and petrogenetic data for the Triassic granitoids of the East Kunlun Orogenic Belt (EKOB), in order to constrain their precise ages, petrogenesis, and tectonic settings. LA-ICP-MS zircon U-Pb data indicate that the Triassic granitoids were emplaced in two stages: (a) Middle Triassic (247-240 Ma), represented by a suite of porphyritic granites and granodiorites; and (b) Late Triassic (234-227 Ma), forming an intrusive rock association of K-feldspar granites, granodiorites, and porphyritic granites. Geochemical analyses and mineral associations suggest that all the Triassic granitoids belong to I-type granites but have different origins. The Middle Triassic granitoids have high SiO 2 , low to moderate Mg # values (25-37 for XSG porphyritic granite; 45-47 for DB granodiorite), low Sr/Y ratios (2.2-4.6 for XSG porphyritic granite; 17.8-20.8 for DB granodiorite), and rela-tively restricted zircon εHf(t) values (+2.4 − +4.6 for the ca. 247 Ma porphyritic granite, and − 8.0 to −1.5 for the ca. 240 Ma granodiorite), indicating that they were dominantly generated from partial melting of different crust sources (either juvenile or ancient) in a normal lower crust level. In contrast, the Late Triassic granitoids have high SiO 2 , K 2 O, and Y contents, low MgO and HREE contents, and variable zircon εHf(t) values (from negative to positive, −4.9 to +3.3), implying a strong crustal-mantle interaction that occurred during the Late Triassic, and this stage of granitoids were derived from a complex magma source possibly a mixture of mantle-derived and ancient crustal-derived materials. By combining these new data with the previous data, we conclude that the two stages of Triassic granitoids were emplaced in an active continental margin setting and a post-collisional extension setting, respectively. Moreover, this study suggests a tectonic shift of the Palaeo-Tethys Ocean in the EKOB from subduction during the Middle Triassic to a post-collision during the Late Triassic.

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“…During the early Neoproterozoic period, the amalgamation of the Cathaysia Block, located to the southeast of the Jiangshan-Shaoxing and Pingxiang-Yushan faults, and the Yangtze Block in the northwest made up the South China Block (Figure 1b) [5,[44][45][46]. The Nanling mountain region is mainly situated at the west central portion of the inland region in the western Zhenghe-Dapu fault of the Cathaysia Block (Figure 1b).…”

Section: Geological Backgroundmentioning

confidence: 99%

“…Mountain building in the Nanling mountains region, in the Cathaysia block of South China (Figure 1a, b), was accompanied by extensive magmatic activities, which resulted in the widespread emplacement of plutons during the Caledonian, Indosinian and Yanshanian tectonic events [1][2][3][4][5]. Among these, the Yanshanian magmatism was the most active and largest event (Figure 1b), producing numerous highly fractionated granitoids [6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Petrogenesis and Tectonic Setting of the Highly Fractionated Junye Granitic Intrusion in the Yiliu Tungsten Polymetallic Deposit, Guangdong Province, South China: Constraints from Geochemistry and Sr-Nd-Pb-Hf Isotopes

Huang

Yang

et al. 2020

Minerals

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The Yiliu tungsten polymetallic deposit, located in the south central portion of the Nanling nonferrous metal metallogenic province in South China, is an area with common Yanshanian tectonothermal events. Early Yanshanian magmatism leads to the emplacement of voluminous tungsten-bearing granite intrusions, such as the Baoshan, Benggangling and Junye plutons, which are considered temporally and spatially associated with W-polymetallic mineralization in the Yiliu region. Here, we investigate the basic geological and petrological characteristics of the Junye granites, and present major and trace element geochemical data and bulk-rock Sr-Nd-Pb-Hf isotopic data to gain insight into the petrogenesis and tectonic setting of granitic intrusions in the region. The Junye granites are high-K calc-alkaline and metaluminous to weakly peraluminous [A/CNK = molar ratios of Al2O3/(CaO + Na2O + K2O) = 0.97–1.02] with enrichment in SiO2 (75.68–76.44 wt.%), relatively high total alkalis (K2O + Na2O = 8.06–8.45 wt.%) with K2O/Na2O ratios ranging from 1.12 to 1.42, and moderate Al2O3 (12.62–13.00 wt.%), but low in P2O5 (<0.01 wt.%), MgO (0.02–0.04 wt.%), CaO (0.78–0.95 wt.%) and Fe2O3T (0.93–1.07 wt.%). They show spectacular tetrad effect REE (rare earth element) patterns with low ΣREE content (53.2–145.3 ppm), negative Eu anomalies (δEu = 0.09–0.17) and slight enrichment of LREEs (light rare earth elements) relative to HREEs (heavy rare earth elements). The granites are enriched in Rb (481–860 ppm), Th (16.2–46.1 ppm) and U (25.4–40.8 ppm) but depleted in Ba (1.0–5.8 ppm), Sr (11.1–23.4 ppm), P (9.5–26.7 ppm) and Ti (241–393 ppm). All geochemical features lead us to interpret the Junye granites as highly fractionated I-type granites. These granites underwent intense interaction between highly evolved magma and volatile-rich hydrothermal fluids during the late stage of formation, and accompanied fractional crystallization of biotite, plagioclase and accessory minerals, such as apatite, monazite and allanite. Additionally, the granites show uniform Nd isotopic ratios with calculated εNd (152 Ma) values of −8.28 to −8.91 and Nd model age (TDM2) of 1645 to 1698 Ma, stable age-corrected initial Pb isotopic compositions with (206Pb/204Pb)i of 18.646–19.010, (207Pb/204Pb)i of 15.767–15.786 and (208Pb/204Pb)i of 39.113–39.159, respectively, and homogeneous Hf isotopic values yielding εHf (152 Ma) values from −6.9 to −9.5 with TDM2 ages of 1680 to 2214 Ma, collectively suggesting that the granitic magma was probably derived from the remelting of ancient infracrustal materials in the basement of the Nanling region. Consequently, we consider that the Junye granites are the products of partial melting of Paleoproterozoic infracrustal medium- to high-K metamorphic basaltic rocks in the Cathaysia Block, which was caused by the underplating of coeval mantle basaltic magmas that provided abundant heat energy for melting in a tectonic setting, with lithospheric extension and thinning during the late Jurassic period.

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Geochemistry, Sr–Nd–Pb–Hf isotopes systematics and geochronological constrains on petrogenesis of the Xishan A-type granite and associated W–Sn mineralization in Guangdong Province, South China

Cited by 33 publications

References 94 publications

Geochronological and Geochemical Constraints on the Petrogenesis and Geodynamic Setting of the Daheishan Porphyry Mo Deposit, Northeast China

Geochronological and Geochemical Constraints on the Petrogenesis and Geodynamic Setting of the Daheishan Porphyry Mo Deposit, Northeast China

Middle to Late Triassic granitic magmatism in the East Kunlun Orogenic Belt, NW China: Petrogenesis and implications for a transition from subduction to post‐collision setting of the Palaeo‐Tethys Ocean

Petrogenesis and Tectonic Setting of the Highly Fractionated Junye Granitic Intrusion in the Yiliu Tungsten Polymetallic Deposit, Guangdong Province, South China: Constraints from Geochemistry and Sr-Nd-Pb-Hf Isotopes

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