Contrasting Two Facies of Muncung Granite in Lingga Regency Using Major, Trace, and Rare Earth Element Geochemistry

Irzon, Ronaldo

doi:10.17014/ijog.2.1.23-33

Cited by 6 publications

(9 citation statements)

References 18 publications

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“…These trends are alike other granitoid units in Eastern Granite Province of Peninsular Malaysia, i.e. Endau Rompin (Ghani et al, 2013), Karimun (Irzon, 2017), both groups of Muncung (Irzon, 2015), and Central Terengganu sector (Ahmad et al, 2002). Among trace elements, V, Ga, Sc, Sr, and Ba depict negative correlation to SiO 2 whilst only Rb with a positive one (Figure 6g-h).…”

Section: Magmatic Differentiation Of the High-k Calcalkaline Seriessupporting

confidence: 66%

Petrography and geochemistry of the Pinkish Lagoi Granite, Bintan Island: Implication to magmatic differentiation, classification, and tectonic history

Irzon¹,

Syafri²,

Ghani³

et al. 2020

BGSM

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The combination of geochemistry and petrography analysis is useful in describing the source, evolution, type, and tectonic of granitoids. The closure of Palaeo-Tethys and the collision between Sibumasu and East Malaya are related to granitic magmatism in Southeast Asia which is classified into East Province, Main Range, and West Province with different characteristics. This study tries to characterize the magmatic differentiation, alphabetic classification, and tectonic history of Lagoi granite which is situated on the Eastern Granite Province in Southeast Asia based on the petrography and geochemistry analysis. Eight granitoid samples have been collected from Lagoi area and analyzed for both petrology and geochemistry using a polarized microscope, XRF, and ICP-MS. Petrographically, the granite consists of quartz, alkali feldspar, biotite, hornblende, and plagioclase. The pinkish Lagoi granite ranges from granodiorite to granite and shows metaluminous character. Seven of the samples are classified in high-K calc-alkaline series, whereas the other one is shoshonitic. The SiO 2 content of high-K calc-alkaline group depicts very good negative correlation to TiO 2 , Al 2 O 3 , Fe 2 O 3T , MnO, CaO, MgO, and P 2 O 5 whilst positive one to K 2 O. Plagioclase reduction during magmatic differentiation is evidenced by Ba and Sr contents, Rb/Sr and CaO/Y ratios, and Eu negative anomaly. The rocks are categorized into I-type in relation to the location relative to Southeast Asia granitic belt, mineral content, and geochemistry composition. The pluton shows syn-collision affinity which formed at the time of Sibumasu and East Malaya collision.

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Section: Magmatic Differentiation Of the High-k Calcalkaline Seriessupporting

confidence: 66%

Petrography and geochemistry of the Pinkish Lagoi Granite, Bintan Island: Implication to magmatic differentiation, classification, and tectonic history

Irzon¹,

Syafri²,

Ghani³

et al. 2020

BGSM

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“…The metamorphic complex occupies the most area of the island whilst the quartzite outcrops situated in the north. Two plutons are located in the Island: the S-type Triassic Muncung Granit which was divided into two facies geochemically on the northeast and the I-type Jurassic Tanjungbuku Granit at the southwest (Irzon 2015). The northern coast of Singkep is dominated by Quartenary Swamp Deposit whilst the Alluvium is located at both north and south shores the island.…”

Section: Local Geologymentioning

confidence: 99%

“…Bukit Tumang is located in west Singkep on which huge batholith of S-type granite identified. The Muncung Granite in Singkep is megascopically light grey, holocrystalline, medium-grained, phaneritic and generally consists of quartz, K-feldspar and plagioclase (Irzon 2015). As located in Bukit Tumang, tin wastes of TRE 51 and TRE 59 were originated from primary minings.…”

Section: Tin Mining In Singkepmentioning

confidence: 99%

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Heavy Metals Content and Pollution in Tin Tailings from Singkep Island, Riau, Indonesia

Irzon¹,

Syafri²,

Hutabarat³

et al. 2018

JSM

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Instead of its economic impact, tin mining activities cause environmental problems. The tin occurrence which is related to tin-bearing alteration on S-type Muncung Granite and its mining history in Singkep Island describes in this study. This work assessed the heavy metals concentration in six tin tailings and two soils from Singkep using inductively coupled plasma-mass spectrometry in correlation to environmental hazard. Both primary and placer mining methods applied in tin excavations on the studied area. Concentration tendency of heavy metals in the six studied tailings samples is generally Cr>Pb>As>Ba≈V. The identical heavy metals trend represented by the three samples from Bukit Tumang might reflect a similar primary tailings character. On the other hand, anthropogenic activities and different surrounding rocks caused the dissimilarity of heavy metals pattern on placer wastes. Higher environmental problems are detected on the primary wastes than the placer one, especially arsenic and chrome. Severe arsenic pollution degree is also indicated in the soil sample just outside the mining location at Betong Village. Conservation and amelioration programs are useful in improving the environmental condition on studied locations.

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“…Plagioklas berupa oligoklas, umumnya telah terubah [3]. Selain itu dari data hasil analisis petrografi yang dilakukan oleh peneliti lain terhadap tiga buah sampel granit Muncung yang diambil dari lokasi lain tapi masih di wilayah granit Muncung menunjukkan bahwa hasil ketiga-tiganya adalah granit, juga tidak ditemukan diorit [4].…”

Section: Analisis Petrografi Granitunclassified

Identifikasi Keterdapatan Mineral Radioaktif pada Granit Muncung Sebagai Tahap Awal untuk Penilaian Prospek Uranium dan Thorium di Pulau Singkep

Ngadenin

Karunianto

2016

EKSPLORIUM

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ABSTRAKPulau Singkep adalah bagian dari jalur timah Asia Tenggara, yang salah satu litologinya tersusun oleh granit Muncung. Keberadaan granit tersebut memungkinkan adanya cebakan mineral radioaktif yang prospek terhadap uranium dan thorium. Penelitian ini bertujuan untuk mengidentifikasi keterdapatan mineral radioaktif pada granit Muncung sebagai tahap awal untuk penilaian prospek uranium dan thorium di Pulau Singkep. Metoda yang digunakan adalah pengambilan sampel batuan granit, analisis petrografi sampel granit Muncung, analisis kadar uranium dan thorium serta analisis butir sampel konsentrat dulang yang diambil di wilayah granit Muncung. Mineral radioaktif pada granit Muncung adalah monasit dan zirkon sedangkan pada konsentrat dulang adalah monasit, zirkon, dan senotim. Persentase monasit dalam konsentrat dulang adalah 1,1 – 59,53 %, zirkon 0,68 –55,07 % dan senotim 0,39 – 3,54 %. Kadar uranium dalam konsentrat dulang adalah 30 – 1.346 ppm dan kadar thorium 557 – 13.200 ppm. Disimpulkan bahwa daerah di sekitar granit Muncung dianggap cukup prospek uranium dan thorium dan dapat dikembangkan ke tahapan eksplorasi lebih detail. ABSTRACTSingkep Island is part of Southeast Asia tin belt, which is one of the lithologies, composed of granite Muncung. Existence of granite allows formed deposits of radioactive minerals that prospect of the uranium and thorium. This research goal is to identify radioactive minerals occurrences on granit Muncung in the initial stage for prospect assessment of uranium and thorium in Singkep Island. The Methodologies are granite sampling, petrography analysis of Muncung granite samples, uranium and thorium content analysis and grain size analysis of pan concentrate samples. Radioactive minerals in Muncung granite are monazite and zircon, while in pan concentrate they are monazite, zircon, and xenotime. The percentage of monazite, zircon, and xenotime in the pan concentrate are 1.1–59.53 %, 0.68–55.07 %, and 0.3–3.54 % respectively. The uranium and thorium content in the pan concentrate are 30–1,346 ppm and 557–13,200 ppm respectively. It concluded that the area around the Muncung granite considered prospect for uranium and thorium, and possibly developed into more detailed exploration stage.

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Contrasting Two Facies of Muncung Granite in Lingga Regency Using Major, Trace, and Rare Earth Element Geochemistry

Cited by 6 publications

References 18 publications

Petrography and geochemistry of the Pinkish Lagoi Granite, Bintan Island: Implication to magmatic differentiation, classification, and tectonic history

Petrography and geochemistry of the Pinkish Lagoi Granite, Bintan Island: Implication to magmatic differentiation, classification, and tectonic history

Heavy Metals Content and Pollution in Tin Tailings from Singkep Island, Riau, Indonesia

Identifikasi Keterdapatan Mineral Radioaktif pada Granit Muncung Sebagai Tahap Awal untuk Penilaian Prospek Uranium dan Thorium di Pulau Singkep

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