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Fluid inclusion study of the Penjom, Tersang, and Selinsing orogenic gold deposits, Peninsular Malaysia

Citation

Makoundi, C and Zaw, K and Endut, Z, Fluid inclusion study of the Penjom, Tersang, and Selinsing orogenic gold deposits, Peninsular Malaysia, Minerals, 10, (2) Article 111. ISSN 2075-163X (2020) [Refereed Article]


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DOI: doi:10.3390/min10020111

Abstract

Ore-forming fluids in the auriferous district of the Central gold belt in Peninsular Malaysia were studied for their temperature, salinity, and relationship to the surrounding geology. Microthermometric analysis carried out showed homogenisation temperatures range from 210 to 348 C (Tersang), between 194 and 348 C (Selinsing), and from 221 to 346 C (Penjom). Salinities range from 2.41 to 8.95 wt % NaCl equiv (Tersang), between 1.23 and 9.98 wt % NaCl equiv (Selinsing), and from 4.34 to 9.34 wt % NaCl equiv (Penjom). Laser Raman studies indicated that at the Tersang gold deposit, most inclusions are either pure or nearly pure CO2-rich (87100 mol %), except for one inclusion, which contains CH4 gas (13 mol %). In addition, at Selinsing, most inclusions are CO2-rich (100 mol %). However, an inclusion was found containing CO2 (90 mol %), with minor N2 and CH4. Additionally, at the Penjom gold deposit, most fluid inclusions are CO2-rich (91100 mol %), whereas one fluid inclusion is N2-rich (100 mol %) and another one has minor N2 and CH4. At a basin scale, homogenisation temperatures against salinity suggests an isothermal mixing of fluids. Most fluids are CO2-rich and are interpreted to be of metamorphic origin. The evidence further indicates involvement of magmatic fluids that is supported by the association of sandstone and carbonaceous black shales with magmatic rocks, such as rhyolite, rhyolite-dacite, and trachyte-andesite at the Tersang and Penjom orogenic gold deposits.

Item Details

Item Type:Refereed Article
Keywords:Peninsular Malaysia, fluid inclusions, laser Raman, microthermometry, gold deposits, orogenic, geochemistry
Research Division:Earth Sciences
Research Group:Geochemistry
Research Field:Exploration geochemistry
Objective Division:Mineral Resources (Excl. Energy Resources)
Objective Group:Mineral exploration
Objective Field:Mineral exploration not elsewhere classified
UTAS Author:Makoundi, C (Mr Charles Makoundi)
UTAS Author:Zaw, K (Professor Khin Zaw)
ID Code:145195
Year Published:2020
Deposited By:CODES ARC
Deposited On:2021-07-08
Last Modified:2021-07-09
Downloads:0

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