Late Cretaceous volcanic rocks in the Sangri area, southern Lhasa Terrane, Tibet: Evidence for oceanic ridge subduction

Zhang, Liangliang; Zhu, Di‐Cheng; Wang, Qing; Zhao, Zhidan; Liu, Dong; Xie, Jin‐Cheng

doi:10.1016/j.lithos.2018.12.023

Cited by 84 publications

(19 citation statements)

References 74 publications

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“…For the nine sandstone samples, both rim and core of detrital zircons as determined by CL imaging were analyzed with 100-140 spots for each sample. All zircon U-Pb isotopes were analyzed via laser ablation-inductively coupled plasma mass spectrometry, following the methods described in Zhang et al (2019). U-Pb data off-line analysis follows Andersen (2002), Ludwig (2003), and Liu et al (2010).…”

Section: Regional Setting Sampling and Analytical Methodsmentioning

confidence: 99%

Reconciling Orogenic Drivers for the Evolution of the Bangong‐Nujiang Tethys During Middle‐Late Jurassic

Wang

Zhu

et al. 2020

Tectonics

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Identifying arc-trench systems along with spatial and temporal variations in their record of tectono-magmatic events is crucial for determining the orogenic divers and evolution of orogenic systems. New geochronological and geochemical data of Jurassic igneous rocks, as well as detrital zircon data from contemporaneous sedimentary units, within the eastern Bangong-Nujiang suture in central Tibet indicate the existence of an approximately 1,200-km Middle-Late Jurassic magmatic arc system. This arc system can be divided into two distinct along-strike segments, which are characterized by magmatic activity extending from 166 to 160 Ma in the east and 170-148 Ma in the west, followed by magmatic gaps at 160-120 and 148-125 Ma, respectively. An accretionary prism, magmatic arc, and retro-arc sedimentary units are identified from south to north in the eastern segment. The 166-160 Ma arc includes high-K calc-alkaline granitoids, and high-Mg andesites, dacites, and rhyolites, which collectively can be interpreted to originate from partial melting of ancient lower crust and mélange diapirs above a north dipping subduction zone. Our analysis reveals the existence of an overall compressional arc-trench system along strike, which overlaps with a phase of 170-160 Ma ophiolite generation and a rock association of 160-148 Ma slab-derived adakites and oceanic island basalt-type rocks, and is followed by an overall magmatic gap during 148-125 Ma with subsequent 125-105 Ma extensive magmatism. We infer that these records may reflect sequential tectonic events, including subparallel ridge-trench collision (170-160 Ma), slab window formation (160-148 Ma), subsequent subduction termination (148-125 Ma), and final Lhasa-Qiangtang amalgamation (125-105 Ma).

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Section: Regional Setting Sampling and Analytical Methodsmentioning

confidence: 99%

Reconciling Orogenic Drivers for the Evolution of the Bangong‐Nujiang Tethys During Middle‐Late Jurassic

Wang

Zhu

et al. 2020

Tectonics

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“…Bu kayaçlar A-tipi granitoid bileşimindedir ve şoşonitik karaktere sahiptir. A-tipi magmaların oluşumu, birkaç farklı mekanizma ile ilişkilidir, (I) manto ve kabuk kaynaklarının kısmi ergimesi [26] (II) manto kaynaklı alkali bazaltik magmaların fraksiyonlaşması [27] (III) manto ve kabuktan türetilmiş magmaların karışımı [28][29], (IV) kıta içi tonalitik I-tipi kayaçların kısmi ergimesi [30][31]. Eby [32] A-tipi granitoidleri jeokimyasal olarak iki gruba ayırmıştır.…”

Section: Discussionunclassified

Petrographic And Geochemical Properties Of The Keban Magmatic Rocks (Keban-Elazığ)

Rizeli

Sar

Ertürk

2021

Mühendislik Bilimleri Ve Araştırmaları Dergisi

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In this study, the petrographic and geochemical characteristics of Late Cretaceous-Middle Eocene Keban magmatic rocks were examined in Keban-Elazığ. Apart from the Keban Magmatic rocks, the other units outcropping around the region are the Late Devonian-Late Triassic Keban Metamorphics, Paleogene-Neogene sedimentary units and Plio-Quaternary alluviums. The investigated rocks are represented by syenite porphyry and quartzmonzonites belonging to Keban Magmatic rocks, which cut the Keban metamorphic rocks. The Keban Magmatic rocks consist of the main minerals are K-feldspar (mega-phenocrystal), plagioclase, amphibole, biotite and quartz minerals, which shows porphyric, porphyric holocrystalline, poikilitic texture in general. All the samples are shoshonitic in composition and fall into the A-type granitoid region. The tectonic environment of the investigated rocks is post-collisional granites.

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“…(3) Lower crustal melting and ascent of K-rich mantle melts at ~95 Ma, followed by emplacement of high-temperature A-type granitoids at 92 Ma, along with the widespread along-strike development of adakitic rocks, charnockites, hightemperature metamorphism, and gradual southward migration of the locus of magmatism across the southern Lhasa terrane are all consistent with an episode of rollback of the Neo-Tethyan subduction system around 95-90 Ma. (Wen et al, 2008;Zhang et al, 2010Zhang et al, , 2019Jiang et al, 2012;Ma et al, 2013;Zheng et al, 2014;Chen et al, 2015aChen et al, , 2015bXu et al, 2015;Meng et al, 2019;Yin et al, 2019;Huang et al, 2020). Petford and Atherton (1996); subducted oceanic slab-derived adakites after Stern and Kilian (1996) (Zheng et al, 2014;Chen et al, 2015aChen et al, , 2015bDai et al, 2018;Wu et al, 2018;Liu et al, 2019;Meng et al, 2019;Tang et al, 2019;Huang et al, 2020;Shi et al, 2020); Miocene adakitic rocks in southern Lhasa terrane (Hou et al, 2004;Li et al, 2011Li et al, , 2017Hu et al, 2017;Sun et al,2018).…”

Section: Discussionmentioning

confidence: 99%

“…4. Wen et al (2008Wen et al ( , 2008a, Zhang et al (2010Zhang et al ( , 2014Zhang et al ( , 2019, Chu et al (2011), Tafti et al (2011), Zhu et al (2011), Jiang et al (2012, 2014, Ma et al (2013Ma et al ( , 2013aMa et al ( , 2013bMa et al ( , 2015, Ji et al (2014), Zheng et al (2014), Chen et al (2015a, Xu et al (2015Xu et al ( , 2019, Ye et al (2015), Gao et al (2017), Dai et al (2018), Wu et al (2018), Liu et al (2019), Meng et al (2019Meng et al ( , 2020…”

Section: Discussionmentioning

confidence: 99%

Late Cretaceous adakitic and A-type granitoids in Chanang, southern Tibet: Implications for Neo-Tethyan slab rollback

Wang

Zhao

et al. 2021

Gondwana Research

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This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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Late Cretaceous volcanic rocks in the Sangri area, southern Lhasa Terrane, Tibet: Evidence for oceanic ridge subduction

Cited by 84 publications

References 74 publications

Reconciling Orogenic Drivers for the Evolution of the Bangong‐Nujiang Tethys During Middle‐Late Jurassic

Reconciling Orogenic Drivers for the Evolution of the Bangong‐Nujiang Tethys During Middle‐Late Jurassic

Petrographic And Geochemical Properties Of The Keban Magmatic Rocks (Keban-Elazığ)

Late Cretaceous adakitic and A-type granitoids in Chanang, southern Tibet: Implications for Neo-Tethyan slab rollback

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