Origin of the late Early Cretaceous granodiorite and associated dioritic dikes in the Hongqilafu pluton, northwestern Tibetan Plateau: A case for crust–mantle interaction

Li, Jiyong; Niu, Yaoling; Hu, Yan; Chen, Shuo; Zhang, Yu; Duan, Meng; Sun, Pu

doi:10.1016/j.lithos.2016.05.028

Cited by 22 publications

(13 citation statements)

References 75 publications

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“…The samples are calc-alkaline to high-K calc-alkaline, metaluminous (aluminum saturation index (ASI) [Al 2 O 3 /(CaO +Na 2 O +K 2 O) mol %] = 1.0 to 1.1), and have Mg# of 38-50 ( Fig. 3), consistent with other analyses of igneous rocks from the South Pamir batholith (Schwab et al, 2004;Jiang et al, 2014;Li, J., et al, 2016).…”

Section: The Rushan-pshart Arc and South Pamir Batholithsupporting

confidence: 86%

“…The largest age peak in the entire dataset occurs in the middle Cretaceous (~104 Ma) and is consistent with igneous rock ages from the South Pamir batholith (Schwab et al, 2004;Jiang et al, 2014;Stearns et al, 2015;Li, J., et al, 2016; this study) ( Fig. 2).…”

Section: Detrital Zircon U-pb and Hf Isotopic Datasupporting

confidence: 86%

“…Other sources of data are denoted by superscripts and come from: 1) Stearns et al 2015; 2) Schwab et al 2004 Major and trace element data for samples analyzed in this study and from literature sources. Early Cretaceous literature data are from the South Pamir batholith in the southeastern Pamir (China) (Jiang et al, 2014;Li, J., et al, 2016). Eocene literature data are from the northern Qiangtang terrane in Tibet (Wang et al, 2008;Chen et al, 2013;Lai and Qin, 2013;Long et al, 2015;Ou et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

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Mesozoic to Cenozoic magmatic history of the Pamir

Chapman

Scoggin

Kapp

et al. 2018

Earth and Planetary Science Letters

101

130

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New geochronologic, geochemical, and isotopic data for Mesozoic to Cenozoic igneous rocks and detrital minerals from the Pamir Mountains help to distinguish major regional magmatic episodes and constrain the tectonic evolution of the Pamir orogenic system. After final accretion of the Central and South Pamir terranes during the Late Triassic to Early Jurassic, the Pamir was largely amagmatic until the emplacement of the intermediate (SiO 2 > 60 wt. %), calcalkaline, and isotopically evolved (-13 to-5 zircon εHf (t)) South Pamir batholith between 120-100 Ma, which is the most volumetrically significant magmatic complex in the Pamir and includes a high flux magmatic event at ~105 Ma. The South Pamir batholith is interpreted as the northern (inboard) equivalent of the Cretaceous Karakoram batholith and the along-strike equivalent of an Early Cretaceous magmatic belt in the northern Lhasa terrane in Tibet. The northern Lhasa terrane is characterized by a similar high-flux event at ~110 Ma. Migration of continental arc magmatism into the South Pamir terrane during the mid-Cretaceous is interpreted to reflect northward directed, low-angle to flat-slab subduction of the Neo-Tethyan oceanic lithosphere. Late Cretaceous magmatism (80-70 Ma) in the Pamir is scarce, but concentrated in the Central and northern South Pamir terranes where it is comparatively more mafic (SiO 2 < 60 wt. %), alkaline, and isotopically juvenile (-2 to +2 zircon εHf (t)) than the South Pamir batholith. Late Cretaceous magmatism in the Pamir is interpreted here to be the result of extension *Manuscript Click here to view linked References directly south of the Tanymas-Jinsha suture zone, an important lithospheric and rheological boundary that focused mantle lithosphere deformation after India-Asia collision. Miocene magmatism (20-10 Ma) in the Pamir includes:1) isotopically evolved migmatite and leucogranite related to crustal anataxis and decompression melting within extensional gneiss domes, and; 2) localized intra-continental magmatism in the Dunkeldik/Taxkorgan complex. Bangong suture zone (Fig. 1) (Yin and Harrison, 2000). The Qiangtang terrane is laterally equivalent to (from north to south) the Central Pamir terrane, the South Pamir terrane, and the Karakoram terrane, whereas there is no direct equivalent of the Lhasa terrane in the Pamir (Fig. 1 and 2) (Robinson et al., 2012). The Central Pamir terrane was accreted to the Triassic Karakul-Mazar arc-accretionary complex along the Tanymas suture (Fig. 2) (Burtman and Molnar, 1993) and the Qiangtang terrane was accreted to the Triassic Songpan-Ganzi turbidite complex along the Jinsha suture in Tibet during Late Triassic-Early Jurassic time (Yin and Harrison, 2000). The Karakul-Mazar complex in the Pamir consists of relatively undeformed Late Triassic intermediate intrusive rocks that were emplaced into a Triassic accretionary complex (Schwab et al., 2004; Robinson et al., 2012). The Karakul-Mazar magmatic rocks are believed to have originated above a north-dipping subduction zone (Schwab et al...

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Section: The Rushan-pshart Arc and South Pamir Batholithsupporting

confidence: 86%

Section: Detrital Zircon U-pb and Hf Isotopic Datasupporting

confidence: 86%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Mesozoic to Cenozoic magmatic history of the Pamir

Chapman

Scoggin

Kapp

et al. 2018

Earth and Planetary Science Letters

101

130

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“…, ; Li et al . , ). Research on temperature and pressure is mainly performed through high‐pressure and high‐temperature petrological experiments, and different mineralogical geothermometers and thermobarometers have been adopted (Boehnke, Watson, Trail, Harrison, & Schmitt, ; Miller, McDowell, & Mapes, ; René, Holtz, Luo, Beermann, & Stelling, ; Watson & Harrison, ).…”

Section: Discussionmentioning

confidence: 97%

Mineralogy, zircon U–Pb–Hf isotopes, and whole‐rock geochemistry of Late Cretaceous–Eocene granites from the Tengchong terrane, western Yunnan, China: Record of the closure of the Neo‐Tethyan Ocean

et al. 2017

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New data from mineralogy, geochemistry, zircon U–Pb dating, and Hf isotopes have revealed Late Cretaceous to Eocene magmatic intrusions in the Tengchong terrane and constrained the origin, tectonic setting, and characteristics of tin‐bearing and barren granitoids. We divide the studied granitoids into two groups: (a) the Late Cretaceous Zhinaxiang (70 Ma) and Early Paleocene Dazhupeng (65 Ma) S‐type barren granites and (b) the Eocene Lailishan A2‐type tin‐bearing granite (50 Ma). All these granitoids display Si‐ and K‐rich and calc‐alkaline characteristics and have similar chondrite‐normalized rare earth element patterns. However, geochemical differences do exist between the two groups of granites. The Zhinaxiang and Dazhupeng S‐type granites are slightly peraluminous, enriched in large‐ion lithophile elements (e.g., Rb and K), and depleted in high‐field‐strength elements (e.g., Nb, Ta, Zr, and Hf), whereas the Lailishan A2‐type granite has higher TFe2O3, high‐field‐strength element content, and Ga/Al ratios. The geochemical and Hf isotopic data indicate that the granites in this study were generated by partial melting of Paleoproterozoic metasedimentary rocks. Due to the subduction of the Neo‐Tethyan Ocean beneath the Eurasian plate, the Zhinaxiang and Dazhupeng S‐type granites were formed in a thickened‐crustal environment, whereas the Lailishan A2‐type granite was emplaced in a post‐collisional extensional setting attributed to slab break‐off. By comparison between tin‐bearing and barren granites, we propose that the Sn mineralization could be related to relatively high‐temperature and low‐pressure crystallization conditions.

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“…38°F igure 1: (a) Simplified tectonic map of the Himalayan-Tibetan Orogen showing major tectonic terranes and sutures (modified after [15]). (b) Geological map of the Western Kunlun-Pamir-Karakorum (WKPK) showing the major tectonic terranes and related granitoids (modified from Li et al, [16]). The so-called basement of Tashkorgan terrane and South Kunlun terrane, locally known as the Bulunkuole Group and Saitula Group, are an early Paleozoic accretionary wedge.…”

mentioning

confidence: 99%

Triassic-Jurassic Granitoids and Pegmatites from Western Kunlun-Pamir Syntax: Implications for the Paleo-Tethys Evolution at the Northern Margin of the Tibetan Plateau

et al. 2020

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The Western Kunlun-Pamir-Karakorum (WKPK) at the northwestern Tibetan Plateau underwent long-term terrane accretion from the Paleozoic to the Cenozoic. Within this time span, four phases of magmatism occurred in WKPK during the Early Paleozoic, Triassic-Jurassic, Early Cretaceous, and Cenozoic. These voluminous magmatic rocks contain critical information on the evolution of the Tethys Oceans. In this contribution, we provide field observations, petrography, ages, whole-rock elemental and Sr-Nd isotopic compositions, and zircon in situ Lu-Hf isotopes of the Triassic-Jurassic granitoids and pegmatites from the Dahongliutan in Western Kunlun and Turuke area at the Pamir Plateau, in an attempt to constrain their petrogenesis and to decipher a more detailed Paleo-Tethys evolution process. The Dahongliutan pluton is composed of diorites (ca. 210 Ma) and monzogranite (ca. 200 Ma). The diorites have moderate SiO2 (56.77–62.22 wt. %), variable Mg# (46–49), and low Cr (34.4–50.6 ppm) and Ni contents (7.0–14.5 ppm). They show LREE-enriched patterns (LaN/YbN=4.3–17), with variable negative Eu anomalies (0.63–0.91) and variable ratios of Nb/La (0.27–0.97). Isotopically, the diorites display enriched whole-rock εNdt (-5.43 to -7.67) and negative to positive zircon εHft values (-6.6 to 0.4). They were most likely generated by melting of a subduction-modified mantle source with subsequent assimilation and fractional crystallization. The Turuke monzogranites (ca. 202–197 Ma) have S-type granite characteristics and are characterized by high SiO2 (70.36–76.12 wt. %) and A/CNK values (1.19–1.36), variable LREE-enriched patterns (LaN/YbN=8.87–14.40), negative Eu anomaly (0.07–0.56), relatively uniform whole-rock εNdt (-10.49 to -11.22), and variable negative zircon εHft values (-10.7 to -1.3). They were probably generated by muscovite-dehydration melting of dominantly metapelitic sources. The widespread pegmatites (ca. 195 Ma) at the Dahongliutan area record an extensional setting after the collision of Karakorum with the South Kunlun-Tianshuihai terrane. Combining our new data with the previous studies, we propose a divergent double-sided subduction of the Paleo-Tethys Ocean (243–208 Ma) and a gradual closure of the Paleo-Tethys Ocean from east (ca. 200 Ma) to west (ca. 180 Ma) to explain the Triassic-Jurassic tectono-magmatism in the WKPK.

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Origin of the late Early Cretaceous granodiorite and associated dioritic dikes in the Hongqilafu pluton, northwestern Tibetan Plateau: A case for crust–mantle interaction

Cited by 22 publications

References 75 publications

Mesozoic to Cenozoic magmatic history of the Pamir

Mesozoic to Cenozoic magmatic history of the Pamir

Mineralogy, zircon U–Pb–Hf isotopes, and whole‐rock geochemistry of Late Cretaceous–Eocene granites from the Tengchong terrane, western Yunnan, China: Record of the closure of the Neo‐Tethyan Ocean

Triassic-Jurassic Granitoids and Pegmatites from Western Kunlun-Pamir Syntax: Implications for the Paleo-Tethys Evolution at the Northern Margin of the Tibetan Plateau

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