Zircon U-Pb age, trace element and Hf isotope composition of Sepon Au-Cu deposit, Laos: tectonic and metallogenic implications

Wang, Xinyu; Dianhua, Cao; Wang, Zongqi; Wang, Anjian; Wu, Yingliang

doi:10.31035/cg2018006

Cited by 16 publications

(6 citation statements)

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“…Interestingly, there is no 310 Ma peak in detrital zircons from both the SCB and IB (Figure 8), and ca. 300 Ma magmatism is rare as a few granite and diorite with this age have been reported in the southern Sam Nua‐Truong Son belt (Kamvong et al., 2014; Y. Li, 2012; X. Wang, Cao, et al., 2018). These rocks were considered as related to the subduction of Paleo‐Tethys Ocean (Kamvong et al., 2014).…”

Section: Discussionmentioning

confidence: 84%

“…Furthermore, the magmatic rocks with ages ranging from 310 to 245 Ma, interpreted as arc-related rocks have been reported in the Western Ailaoshan and Sam Nua-Truong Son belts (Figure 1; e.g., Fan et al, 2010;Hoa et al, 2008;Hou et al, 2019;Jiang et al, 2020;Kamvong et al, 2014;Y. Li, 2012;Qian et al, 2019;X. Wang, Cao, et al, 2018).…”

Section: Tectonic Implicationsmentioning

confidence: 77%

“…300 Ma magmatism is rare as a few granite and diorite with this age have been reported in the southern Sam Nua-Truong Son belt (Kamvong et al, 2014;Y. Li, 2012;X. Wang, Cao, et al, 2018).…”

Section: Provenance Of the Paleozoic Zirconsmentioning

confidence: 84%

“…Furthermore, the magmatic rocks with ages ranging from 310 to 245 Ma, interpreted as arc‐related rocks have been reported in the Western Ailaoshan and Sam Nua‐Truong Son belts (Figure 1; e.g., Fan et al., 2010; Hieu, Dung, et al., 2016; Hoa et al., 2008; Hou et al., 2019; Jiang et al., 2020; Kamvong et al., 2014; Lai, Meffre, Crawford, Zaw, Halpin, et al., 2014; Y. Li, 2012; Qian et al., 2019; X. Wang, Cao, et al., 2018). In contrast to the widespread Late Permian‐Middle Triassic magmatism, the distribution of Late Carboniferous‐Middle Permian magmatism is relatively limited in this magmatic belt (Hou et al., 2019).…”

Section: Discussionmentioning

confidence: 99%

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Detrital Zircon U‐Pb Age Distribution and Hf Isotopic Constraints From the Terrigenous Sediments of the Song Chay Suture Zone (NE Vietnam) and Their Paleogeographic Implications on the Eastern Paleo‐Tethys Evolution

Wang¹,

Lin²,

Faure

et al. 2021

Tectonics

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The location of the suture zone between the South China Block (SCB) and the Indochina Block (IB) is disputed. Recently, along the Song Chay (Chay river) belt, a mélange zone was proposed as a potential suture zone of the SCB and IB. However, the provenance and age of the Song Chay mélange is poorly known. In order to better constrain the age and provenance of the elements forming the Song Chay mélange, nine samples of detrital material, and one orthogneiss were subjected to zircon U‐Pb and Hf isotope analysis. Detrital zircons from the silty matrix of the Song Chay mélange record three major Neoproterozoic age clusters at 580–650, 700–800, and 900–1,000 Ma, which correspond well to the substratum of the SCB. Two minor Late and Early Paleozoic age groups at 270–330, and 420–500 Ma, with mainly negative εHf(t) values were also recovered. We consider that the zircons in the matrix of the mélange were mainly derived from the subducting plate, namely the SCB. This interpretation is supported by the occurrence of lensoid sandstone blocks, representing the substratum of the SCB, included into the mélange. The deposition age of the Song Chay mélange is between 310 and 250 Ma. Our results demonstrate that in an ophiolitic mélange, the detrital material does not invariably come from the overriding plate, but at the onset of the collision, the subducting continental plate may also supply the terrigenous material.

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Section: Discussionmentioning

confidence: 84%

Section: Tectonic Implicationsmentioning

confidence: 77%

“…300 Ma magmatism is rare as a few granite and diorite with this age have been reported in the southern Sam Nua-Truong Son belt (Kamvong et al, 2014;Y. Li, 2012;X. Wang, Cao, et al, 2018).…”

Section: Provenance Of the Paleozoic Zirconsmentioning

confidence: 84%

Section: Discussionmentioning

confidence: 99%

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Detrital Zircon U‐Pb Age Distribution and Hf Isotopic Constraints From the Terrigenous Sediments of the Song Chay Suture Zone (NE Vietnam) and Their Paleogeographic Implications on the Eastern Paleo‐Tethys Evolution

Wang¹,

Lin²,

Faure

et al. 2021

Tectonics

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“…Older studies on igneous assemblages in the Truong Son Terrane relied on easily re-set K-Ar dates but recent work has included more reliable dates using zircons, 40 Ar-Ar 39 and monazites along with detailed trace element and isotope data. The papers by Sanematsu et al (2011), Liu et al (2012, Kamvong et al (2014), Manaka et al (2014), Nakano et al (2013), Shi et al (2015, Wang et al (2018), andWang et al (2020) are particularly important (Figures 5, 7). These authors find that the granitoids of the Truong Son Terrane are either mainly Ordovician-Silurian or latest Carboniferous to Triassic in age with restricted magmatism in-between (Figures 5, 7).…”

Section: Truong Son Terranementioning

confidence: 99%

The Truong Son, Loei-Phetchabun, and Kontum Terranes in Indochina: Provenance, Rifting, and Collisions

2021

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The three main regions of Indochina are defined as the Truong Son, Loei-Phetchabun, and Kontum terranes. The aim of this review is to integrate numerous petrological studies with sedimentary, palaeontological, and provenance studies in order to construct a preliminary tectonic model which shows the terranes docked in the earliest Carboniferous (Truong Son with Loei-Phetchabun) and in the Permian (Kontum). The Kontum Terrane is characterized by Proterozoic magmatism, mid-Ordovician to Early Devonian granites, and Permian charnockites. Major carbonate platforms developed in the Givetian to earliest Tournaisian on Truong Son and from the Visean to mid-Permian across Truong Son and Loei-Phetchabun terranes. The Truong Son has Silurian granites and a Late Ordovician to Silurian magmatic arc along its southern and western borders caused by subduction of oceanic lithosphere, the remnants of which are now partially preserved in the Loei and Tamky sutures. A region to the east of the Loei Suture in the Loei Foldbelt has a similar-age volcanic arc extending northwards into Laos and is included in Truong Son. A platform-margin coral-stromatoporoid reef developed on Truong Son in the Frasnian and was coincident with a gap in magmatism until the Pennsylvanian with granite magmatism became widespread until the Late Triassic. In the Loei-Phetchabun Terrane, Devonian siliciclastics, volcanics are overlain by Givetian limestones and patch reefs and in turn overlain by Late Devonian to earliest Tournaisian radiolarian cherts and siliciclastics. Tournaisian to early Visean siliciclastic turbidites were coincidental with initial uplift and deformation and were replaced by Visean terrestrial evaporites and coal and marine limestones. Arc magmatism along the Loei-Phetchabun Terrane indicates intermittent eastward subduction from mid-Devonian to mid-Triassic. Carboniferous-Triassic volcanism extends eastward along the northern margin of Cambodia and is probably an extension of Loei-Phetchabun. Ordovician within-plate basalts in Kontum and the transition from shallow marine Ordovician siliciclastics to Silurian deep-marine sediments and a volcanic arc in Truong Son suggest rifting of both terranes from Gondwana in the Late Ordovician. Initial docking of Truong Son with South China was probably in the late Silurian to Early Devonian and docking of Loei-Phetchabun and Truong Son was in the late Tournaisian to early Visean.

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Geology, fluid inclusions, H-O isotope, and hydrothermal zircon U-Pb geochronology of the Daqingshan orogenic gold deposit in Beishan orogenic belt, Xinjiang, NW China

Zhang

et al. 2020

Miner Deposita

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Zircon U-Pb age, trace element and Hf isotope composition of Sepon Au-Cu deposit, Laos: tectonic and metallogenic implications

Cited by 16 publications

References 0 publications

Detrital Zircon U‐Pb Age Distribution and Hf Isotopic Constraints From the Terrigenous Sediments of the Song Chay Suture Zone (NE Vietnam) and Their Paleogeographic Implications on the Eastern Paleo‐Tethys Evolution

Detrital Zircon U‐Pb Age Distribution and Hf Isotopic Constraints From the Terrigenous Sediments of the Song Chay Suture Zone (NE Vietnam) and Their Paleogeographic Implications on the Eastern Paleo‐Tethys Evolution

The Truong Son, Loei-Phetchabun, and Kontum Terranes in Indochina: Provenance, Rifting, and Collisions

Geology, fluid inclusions, H-O isotope, and hydrothermal zircon U-Pb geochronology of the Daqingshan orogenic gold deposit in Beishan orogenic belt, Xinjiang, NW China

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