Discovery of Au–Ag mineralization by stream sediment and soil geochemical exploration in metamorphic terrain in western Turkey

Yılmaz, Hüseyin; Sönmez, Fatma Nuran; Carranza, Emmanuel John M.

doi:10.1016/j.gexplo.2015.07.003

Cited by 34 publications

(4 citation statements)

References 49 publications

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“…Mineralisasi logam tertentu juga sering terjadi pada batuan dengan karakter spesifik, seperti Ni-Co cenderung pada batuan rendah SiO 2 (ultra mafik-mafik) dan Sn-W pada batuan tinggi SiO 2 (felsik) dapat dijelaskan berdasarkan kecenderungan karakter geokimia seperti terdapat pada penelitian terdahulu [8][9][10][11]. Tipikal batuan yang terdapat pada sekitar aliran sungai dapat ditelusuri dengan studi geokimia sedimen aliran [12,13]. Derajat kontaminasi logam berat pada wilayah bekas penambangan dapat ditentukan melalui perbandingan komposisi sedimen terhadap nilai ambang batas yang telah ditetapkan [14,15].…”

Section: Pendahuluanunclassified

Komparasi Geokimia Batuan Gunung Api Kuarter dan Tersier di Tepian Selatan Lampung

Irzon

2020

EKSPLORIUM

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ABSTRAK Keterdapatan batuan gunung api di Sumatra diakibatkan oleh penunjaman Lempeng Samudra India-Australia ke bawah Lempeng West Sumatra sejak Eosen. Tanggamus adalah kabupaten di ujung selatan Lampung dengan keterdapatan beberapa unit batuan gunung api berumur Tersier maupun Kuarter. Studi ini bertujuan untuk membandingkan komposisi geokimia batuan gunung api Tersier Formasi Hulusimpang dengan batuan gunung api Kuarter Gunung Tanggamus. Perangkat XRF dan ICP-MS dimanfaatkan untuk mengetahui kadar oksida utama, unsur jejak, dan unsur tanah jarang pada penelitian ini. Berdasarkan karakter geokimia, sampel dari Formasi Hulusimpang adalah batuan gunung api kalk-alkali, metalumina hingga peralumina, dan dalam rentang trakiandesit basaltik hingga riolit. Sampel batuan gunung api berumur Kuarter berada pada rentang kadar silika yang lebih sempit dan cenderung metalumina. Studi ini membuktikan bahwa kedua kelompok batuan berasal dari magma yang sama, tetapi dengan kontaminasi kerak selama diferensiasi. Proses pembentukan yang berbeda pada kedua kelompok batuan diperjelas oleh derajat kemiringan kurva diagram laba-laba UTJ dan jenis anomali Eu.ABSTRACT The presence of volcanic rocks in Sumatra is due to the subduction of the Indian-Australian Ocean Plate under the West Sumatra Plate since the Eocene. Tanggamus Regency situated at the southern edge of Lampung with the occurrence of several Tertiary and Quaternary volcanic rock units. The aim of this study is to compare the geochemical composition of Tertiary volcanic rocks from the Hulusimpang Formation and Quaternary volcanic rocks from Mount Tanggamus in the Tanggamus Regency. XRF and ICP-MS devices were used to determine the compositions of major oxides, trace elements, and rare earth elements in this study. Based on geochemical characters, samples from the Hulusimpang Formation are calc-alkaline volcanic rocks, metaluminous to peraluminous, and in the basaltic trachyandesite to rhyolite ranges. Quaternary samples are in a narrower range of silica content and tend to be metaluminous. This study proves that the two rock groups originate from the same magma but with crustal contamination during differentiation. The two volcanic should experience through different formation processes based on the slope of the heavy-REE and the type of Eu anomaly.

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Section: Pendahuluanunclassified

Komparasi Geokimia Batuan Gunung Api Kuarter dan Tersier di Tepian Selatan Lampung

Irzon

2020

EKSPLORIUM

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“…Books of foreign scientists translated into Russian are very popular [31,32]. Their early publications on the study of stream sediments for the purpose of ore deposit prospecting can be referred to, for example, in [33][34][35][36][37][38][39][40][41][42] and, more recently, in [43][44][45][46][47][48][49][50][51][52][53][54][55].…”

Section: Introductionmentioning

confidence: 99%

Lithochemical Stream Sediments of the Dukat Gold–Silver Ore-Forming System (North–East of Russia)

2019

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The composition, structure and formation features of the exogenous anomalous geochemical fields (AGFs) identified by lithochemical stream sediments (LSSs) are considered using the examples of the Dukat gold–silver ore-forming system and the deposit with the same name. The research was carried out in the Balygychan–Sugoy trough (Magadan region, north–east of Russia). Areal geochemical surveys on the 1:200,000 and 1:50,000 scales were conducted. Exogenous AGFs of basic element indicators of all known mineralization types were studied. It is shown that the surveys on the 1:200,000 scale are characterized by simplicity, relative depth and the possibility to obtain information operatively about the metallogeny of the area as a whole. At the same time, the anomalies were revealed as a result of surveys often making a relatively poor component composition and low contrast compared with ores. The violation of quantitative and sometimes qualitative relationships can be seen between elements, especially those related to gold–silver mineralization. In this situation, the most informative are surveys of LSSs on the 1:50,000 scale. The AGFs were revealed as a result of their performance to have a richer component composition and high contrast, conforming to different ore types. It is shown that, while prospecting for gold–silver mineralization with LSSs in cryolithogenesis zone conditions, the binding forms study of mineralization element indicators is effective. In watercourse heads, where alluvium is practically absent, mosses are proposed for sampling, as they hold the sandy silt material firmly. The obtained results are recommended for use at all stages of prospecting, not only in the north–east of Russia but also in other similar climatic regions.

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“…In initial stages of exploratory investigations, stream sediment geochemical data are used to determine target areas for detailed exploration of mineral deposits (Afzal et al, 2010a;Arias et al, 2011;Carranza, 2011;Hale, 1997, 2002;Daya, 2015;Parsa et al, 2016bParsa et al, , 2017bParsa et al, , 2017cSadeghi et al, 2015;Wang et al, 2014;Yilmaz, 2003Yilmaz, , 2007Yilmaz et al, 2015;Zuo, 2011aZuo, , 2011bZuo et al, 2009) and differentiation of geochemical anomalies from background concentrations plays a crucial role in regional geochemical prospecting for mineral exploration (Carranza, 2008). Identification of anomaly patterns is influenced by both the frequency and spatial variation of geochemical samples.…”

Section: Introductionmentioning

confidence: 99%

Comparison of U-spatial statistics and C–A fractal models for delineating anomaly patterns of porphyry-type Cu geochemical signatures in the Varzaghan district, NW Iran

Ghezelbash¹,

Maghsoudi²

2018

Comptes Rendus. Géoscience

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Discovery of Au–Ag mineralization by stream sediment and soil geochemical exploration in metamorphic terrain in western Turkey

Cited by 34 publications

References 49 publications

Komparasi Geokimia Batuan Gunung Api Kuarter dan Tersier di Tepian Selatan Lampung

Komparasi Geokimia Batuan Gunung Api Kuarter dan Tersier di Tepian Selatan Lampung

Lithochemical Stream Sediments of the Dukat Gold–Silver Ore-Forming System (North–East of Russia)

Comparison of U-spatial statistics and C–A fractal models for delineating anomaly patterns of porphyry-type Cu geochemical signatures in the Varzaghan district, NW Iran

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