Cambrian ultrapotassic rhyolites from the Lhasa terrane, south Tibet: Evidence for Andean-type magmatism along the northern active margin of Gondwana

Ding, Huixia; Zhang, Zeming; Dong, Xin; Yan, Ruiqi; Lin, Yanhao; Jiang, Hongying

doi:10.1016/j.gr.2014.02.003

Cited by 83 publications

(30 citation statements)

References 137 publications

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“…The Cadomian orogen reflects the subduction that formed the several thousand-kilometers long Cadomian-Avalonian arc along the northern margin of Gondwana (Garfunkel, 2015;Kroner and Romer, 2013). This belt stretches from Iberia through Central and SE Europe into Turkey and Iran (von Raumer et al, 2002); vestiges are found to the east in southern Tibet (e.g., (Ding et al, 2015;Hu et al, 2013)). Cadomian basement is also recently documented in northern Arabia (Stern et al, 2016;Thomas et al, 2015).…”

Section: Source Of Cadomian Zirconsmentioning

confidence: 99%

Early Paleozoic tectonic reconstruction of Iran: Tales from detrital zircon geochronology

Moghadam

Griffin

et al. 2017

Lithos

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In this study we use detrital zircons to probe the Early Paleozoic history of NE Iran and evaluate the link between sediment sources and Gondwanan pre-Cadomian, Cadomian and younger events. U-Pb zircon ages and Hf isotopic compositions are reported for detrital zircons from Ordovician and Early Devonian sedimentary rocks from NE Iran.These clastic rocks are dominated by zircons with major age populations at ~2.5 Ga, ~0.8-0.6 Ga, 0.5 Ga and ~0.5-0.4 Ga as well as a minor broad peak at ~1.0 Ga. The source of 2.5 Ga detrital zircons is enigmatic; they may have been supplied from the Saharan Metacraton (or West African Craton) to the southwest or Afghanistan-Tarim to the east. The detrital zircons with age populations at 0.8-0.6 Ga probably originated from Cryogenian-Ediacaran juvenile igneous rocks of the Arabian-Nubian Shield; this inference is supported by their juvenile Hf isotopes, although some negative εHf (t) values suggest that other sources (such as the West African Craton) were also involved.The age peak at ca 0.

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Section: Source Of Cadomian Zirconsmentioning

confidence: 99%

Early Paleozoic tectonic reconstruction of Iran: Tales from detrital zircon geochronology

Moghadam

Griffin

et al. 2017

Lithos

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“…In contrast, the central part not only develops Mesozoic-Cenozoic geological records, but also possesses an ancient basement and most of the pre-Mesozoic geological records of the Lhasa terrane, including Precambrian granitic rocks (cf. Hu et al, 2005), Paleozoic sedimentary and volcanic rocks (Ding et al, 2014b;Pan et al, 2004;Zhu et al, 2010Zhu et al, , 2012.…”

Section: Geological Background and Samplesmentioning

confidence: 99%

The Gangdese magmatic constraints on a latest Cretaceous lithospheric delamination of the Lhasa terrane, southern Tibet

Chung

et al. 2014

Lithos

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“…The period 268–283 Ma only contain three detrital zircon grains, which correspond to the Permian magmatic event in the Central Uplift Belt (Zhai et al, ). Similarity, the period 446–630 Ma contains 17 detrital zircon grains also correspond to the two most important orogenic events in the Gondwana Land, which are the Pan‐African orogenic event (500–600 Ma; Joseph, ; Trond & Robin, ) and Andean‐type orogenic event (470–530 Ma; Cawood, Johnson, & Nemchin, ; Ding et al, ), respectively. Recently, the 470–580 Ma ages are related to the above two tectonic events that have been obtained from the Central Uplift Belt (Deng, Zhang, Zhang, & Liu, ; Dong et al, ; Peng et al, ; Tan et al, ; Zheng et al, ).…”

Section: Discussionmentioning

confidence: 67%

Provenance and tectonic setting of the Quemoco sandstones in the North Qiangtang Basin, North Tibet: Evidence from geochemistry and detrital zircon geochronology

Wang

et al. 2017

Geological Journal

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The geochemistry and detrital zircon geochronology of the Quemoco sandstones from the Woruo Mountain area, North Qiangtang Basin, are analysed to discriminate their provenance and tectonic setting. The sandstones were classified as litharenite according to their geochemical data. The index of chemical variability and SiO2/Al2O3 ratio values suggest that the compositional maturity and recycling are weak to moderate. The weathering indices, such as chemical index of alteration, plagioclase index of alteration, and chemical index of weathering, and A–CN–K (Al2O3–(CaO* + Na2O)–K2O) ternary plot reflect that the source areas have undergone a weak degree of weathering. The TiO2 versus Zr, La/Th versus Hf, and Co/Th versus La/Sc bivariate diagrams and multimajor elements discrimination diagram of Quemoco sandstones indicate that the provenances were primarily derived from felsic igneous rocks and may also have less intermediate igneous source rocks. The paleocurrent data and low composition and textural maturity of the Quemoco sandstones suggested that the provenances are mainly from the southwest of the study area and with proximal source features. The U–Pb ages studied here could be divided into 8 groups: 206–219 Ma, 268–283 Ma, 446–630 Ma, 700–970 Ma, 1006–1346 Ma, 1457–1843 Ma, 2087–2214 Ma, and 2331–2587 Ma. The provenances are mainly from the Central Uplift Belt and surrounding of the study area according to the detrital zircon ages and rare earth element parameters, which are composed of Late Triassic tuff, Permian basalt, Early Ordovician granite, Cambrian granite gneiss, and Precambrian crystalline basement. Two multidimensional tectonic discrimination diagrams based on major elements show a complicated tectonic setting composed of a collision, rift, and minor arc setting for the Quemoco sandstones, which is consistent with the nature of a rifted margin during the late Late Triassic.

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Cambrian ultrapotassic rhyolites from the Lhasa terrane, south Tibet: Evidence for Andean-type magmatism along the northern active margin of Gondwana

Cited by 83 publications

References 137 publications

Early Paleozoic tectonic reconstruction of Iran: Tales from detrital zircon geochronology

Early Paleozoic tectonic reconstruction of Iran: Tales from detrital zircon geochronology

The Gangdese magmatic constraints on a latest Cretaceous lithospheric delamination of the Lhasa terrane, southern Tibet

Provenance and tectonic setting of the Quemoco sandstones in the North Qiangtang Basin, North Tibet: Evidence from geochemistry and detrital zircon geochronology

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