Petrochemistry of Granitoids Along the Loei Fold Belt, Northeastern Thailand

Nualkhao, Patchawee; Takahashi, Ryohei; Imai, Atsushi; Charusiri, Punya

doi:10.1111/rge.12176

Cited by 18 publications

(18 citation statements)

References 46 publications

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“…The ages of the first group correspond to magmatic activity in the Loei Fold Belt (260–170 Ma) or Truong Son Fold Belt (290–190 Ma) ( Zaw et al., 2009 , 2014 ; Sanematsu et al., 2011 ; Kawakami et al., 2014 ; Manaka et al., 2014 ; Nualkhao et al., 2018 ). Based on their locations, the plutonic rocks of Phnom Daek, Phnom Koy Rmeas, Svay Leu, Oyadav South, and Phnom Soporkaley were likely formed by magmatic activity in the Loei Fold Belt, which likely extended north of the Mae Ping Fault in Thailand ( Nualkhao et al., 2018 ) ( Figure 6 ). This inference is supported by measurements of magnetic susceptibility and whole-rock chemistry ( Cheng et al., 2019 ).…”

Section: Discussionmentioning

confidence: 99%

“…In the Loei Fold Belt in Thailand, located north of the Mae Ping Fault, Au, Cu, Fe, and Sb deposits were formed in association with igneous rocks ( Salam et al., 2014 ; Kamvong et al., 2014 ; Zaw et al., 2014 ; Nualkhao et al., 2018 ). Fe deposits are accompanied by plutonic rocks in Phnom Daek and Svay Leu.…”

Section: Discussionmentioning

confidence: 99%

“…These rocks formed as a result of collisions of the terranes and the subduction of the Paleo-Tethys, Meso-Tethys, and Ceno-Tethys Oceans, which existed between these terranes. Important metal deposits were also formed as a result of the movement of these terranes ( Kamvong et al., 2014 ; Zaw et al., 2014 ; Gardiner et al., 2016 ; Nualkhao et al., 2018 ). Among the countries that make up Mainland Southeast Asia, research on plutonic rocks in Cambodia is lagging behind.…”

Section: Introductionmentioning

confidence: 99%

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Zircon U–Pb chronology on plutonic rocks from northeastern Cambodia

Kasahara

Niki

Uchida

et al. 2021

Heliyon

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Zircon U–Pb geochronology was carried out on plutonic rocks from Phnom Daek, Phnom Koy Rmeas, Svay Chras, Kon Mom, Koh Nheak, Andong Meas, Oyadav South, Svay Leu, and Phnom Soporkaley. The zircon U–Pb ages from the plutonic rocks determined in this study can be roughly divided into two groups. One is the Late Permian to Triassic ages of 278–202 Ma for the Phnom Daek, Phnom Koy Rmeas, Oyadav South, Svay Leu, and Phnom Soporkaley, and the other is the early Cretaceous ages of 118–98 Ma for the Svay Chras, Kon Mom, Koh Nheak, and Andong Meas samples. The plutonic rocks from Phnom Daek, Phnom Koy Rmeas, Svay Leu, Oyadav South, and Phnom Soporkaley were likely formed by magmatic activity in the Loei Fold Belt. These plutonic rocks were likely formed in an extensional setting and/or a region where the continental crust was thin. The plutonic rocks of Svay Chras, Kon Mom, Koh Nheak, and Andong Meas were likely formed by magmatic activity in the Dalat-Kratie Fold Belt, related to the NW-directed subduction of the Paleo-Pacific Ocean plate. These plutonic rocks are thought to correspond to the Dinhquan suite in southern Vietnam. The Kon Mom and Koh Nheak plutonic rocks fall within the alkaline series, which suggests that the magma genesis was deep and far from the western Paleo-Pacific Ocean plate. Magmatic activity in the Dalat-Kratie Fold Belt migrated oceanward as a whole during the Cretaceous.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Zircon U–Pb chronology on plutonic rocks from northeastern Cambodia

Kasahara

Niki

Uchida

et al. 2021

Heliyon

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“…Subsequently, in Middle Triassic, the arc magmatism related to subduction of Palaeo-Tethys and Indochina Terrane ( Figure 9C) had still proceeded along with the formation of Middle Triassic biotite-hornblende granite (zircon U-Pb ages of 237.6 ± 3.8 Ma from Fanka et al, 2018) (Figure 8) and continued colliding until the Late Triassic (Sone and Metcalfe, 2008;Ridd, 2012;Kamvong et al, 2014;Salam et al, 2014) or Middle Jurassic (Nualkhao et al, 2018). This magmatic event is supported by the occurrence of the plutonic rocks in Pak Chong area (zircon U-Pb ages of 241 ± 6 Ma in Morley et al, 2013 andArboit et al, 2016), Phetchabun area (zircon U-Pb ages of 249.2-245.9 Ma from Salam et al, 2014), Loei area (zircon U-Pb ages of 230 ± 4 Ma, from Khositanont et al, 2008), and volcanic rocks in Loei area [zircon U-Pb ages of 245.9-241 Ma from Kamvong et al (2014)] along LFB (Figure 9).…”

Section: Tectonic Implicationsmentioning

confidence: 99%

Magma Genesis and Arc Evolution at the Indochina Terrane Subduction: Petrological and Geochemical Constraints From the Volcanic Rocks in Wang Nam Khiao Area, Nakhon Ratchasima, Thailand

2020

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Volcanic rocks and associated dikes have been exposed in Wang Nam Khiao area, Nakhon Ratchasima Province, northeastern Thailand where complex tectonic setting was reported. These volcanic rocks are classified as rhyolite, dacite, and andesite whereas dikes are also characterized by andesitic composition. These dikes clearly cut into the volcanic rocks and Late Permian hornblende granite in the adjacent area. Rhyolite and dacite are composed of abundant plagioclase and quartz whereas andesite and andesitic dike contain mainly plagioclase and hornblende with minor quartz. The volcanic rocks typically show plagioclase and hornblende phenocrysts embedded in fine-grained quartz and glass groundmass whereas dike rocks contain less glass matrix with more albitic laths. P-T conditions of crystallization are estimated, on the basis of Alin-hornblende geobarometry and hornblende geothermometry, at about 4.5-5.5 kbar, 861-927 • C and 4.8-5.5 kbar, 873-890 • C for the magma intrusions that fed volcanic rocks and andesitic dikes, respectively. Whole-rock geochemistry indicates that these rock suites are related to calc-alkaline hydrous magma. The enriched large-ion lithophile elements (LILE; e.g., Rb, Sr) and depleted high-field-strength elements (HFSE; e.g., Nb, Ce, Ti), with similar rare earth element (REE) patterns indicate arc magmatism. The results of this study are comparable with the continental arc magmatism along the Loei Fold Belt (LFB) as a consequence of the Late Permian Palaeo-Tethys subducted beneath Indochina Terrane.

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“…Northern Thailand comprises the Indochina and Sibumasu Terranes and two tectonic belts, namely, the Sukhothai Fold Belt and the Loei‐Phetchabun Fold Belt (Figure 1a; Barr and Macdonald, 1991; Barr et al ., 2000; Ueno and Hisada, 2001; Sone and Metcalfe, 2008; Searle et al ., 2012; Nualkhao et al ., 2018). The geology of the Sukhothai Fold Belt is interpreted as an accretionary complex formed by subduction and collision between the Shibumasu and Indochina Terranes (Singharajwarapan and Berry, 2000; Hara et al ., 2017).…”

Section: Regional Geologic Settingmentioning

confidence: 99%

Geochemical characteristics of gold mineralization of the Huai Kham On deposit, Sukhothai Fold Belt, Northern Thailand

2020

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The Huai Kham On gold deposit is located in the central part of the Sukhothai Fold Belt, northern Thailand. The Sukhothai Fold Belt represents an accretionary complex formed by subduction and collision between the Indochina and Sibumasu Terranes. There are many small gold deposits in the Sukhothai Fold Belt; however, the styles and formation environments of those gold deposits are not clear. The geology of the Huai Kham On deposit consists of volcanic and volcanosedimentary rocks, limestone, and low‐grade metamorphic rocks of Carboniferous to Triassic age. Gold‐bearing quartz veins are hosted by volcanic and volcanosedimentary rocks. The quartz veins can be divided into four stages. The mineral assemblage of the gold‐bearing quartz veins of Stages I and II comprises quartz, calcite, illite, pyrite, native gold, galena, chalcopyrite, and sphalerite. Quartz veins of Stage III consist of microcrystalline quartz, dolomite, calcite, pyrite, native gold, and chalcopyrite. Veins of Stage IV consist of calcite, dolomite, chlorite, and quartz. Fluid inclusions in quartz veins are classified into liquid‐rich two‐phase (Types IA and IB), carbonic‐aqueous (Type II), and carbonic (Type III) fluid inclusions. The homogenization temperatures of Types IA and II fluid inclusions that are related to the gold‐bearing quartz veins from Stages I to III ranged from 240° to 280°C. The δ18O values of quartz veins of Stages I to III range from +12.9 to +13.4‰, suggesting the presence of a homogeneous hydrothermal solution without temperature variation such as a decrease of temperature during the formation of gold‐bearing quartz veins from Stages I to III in the Huai Kham On gold deposit. Based on the calculated formation temperature of 280°C, the δ18O values of the hydrothermal solution that formed the gold‐bearing quartz veins range from +3.2 to +3.7‰, which falls into the range of metamorphic waters. The gold‐bearing quartz veins of the Huai Kham On deposit are interpreted to be the products of metamorphic water.

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Petrochemistry of Granitoids Along the Loei Fold Belt, Northeastern Thailand

Cited by 18 publications

References 46 publications

Zircon U–Pb chronology on plutonic rocks from northeastern Cambodia

Zircon U–Pb chronology on plutonic rocks from northeastern Cambodia

Magma Genesis and Arc Evolution at the Indochina Terrane Subduction: Petrological and Geochemical Constraints From the Volcanic Rocks in Wang Nam Khiao Area, Nakhon Ratchasima, Thailand

Geochemical characteristics of gold mineralization of the Huai Kham On deposit, Sukhothai Fold Belt, Northern Thailand

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