Pb‐isotope compositions of the Tasik Chini volcanic‐hosted massive sulfide deposit, Central Belt of Peninsular Malaysia: Implication for source region and tectonic setting

Abstract

Lead isotope data of sulfides and host volcanic rocks from the Bukit Botol and Bukit Ketaya deposits, the two representative deposits of the Tasik Chini volcanic‐hosted massive sulfide (VHMS) deposit, Central Belt of Peninsular Malaysia, are reported. Lead isotope compositions of the associated sulfide minerals and volcanic rocks from the Bukit Botol deposit exhibit homogeneous and less radiogenic values (206Pb/204Pb showing a range of composition from 18.14 to 18.20, 207Pb/204Pb between 15.52 and 15.59 and 208Pb/204Pb from 37.96 to 38.35). Similarly, the Pb isotopic compositions of the host volcanic rocks from the Bukit Ketaya deposit yielded a narrow range to those of the sulfide samples (206Pb/204Pb from 18.04 to 18.20, 207Pb/204Pb between 15.43 and 15.57 and 208Pb/204Pb of 37.96 to 38.30). The uniform Pb‐isotope compositions of the sulfides in the ore horizon and the host volcanic rocks from both deposits suggest a derivation from a similar source reservoir and mineralization processes. In the framework of the tectonic model for the Central Belt of Peninsular Malaysia, both deposits display a range of lead isotopic compositions originated from mixing of bulk crust/juvenile arc and minor mantle sources, which are typical for VHMS deposits in an island arc–back arc setting.

Data analysis of the U–Pb geochronology and Lu–Hf system in zircon and whole-rock Sr, Sm–Nd and Pb isotopic systems for the granitoids of Thailand

“… εNd (t) against initial Sr (Fig. 5c in [1] ) Sibumasu [37] Indochina [46] , [50] , [51] Sukhothai including Lincang and Chanthaburi [42] , [44] , [48] , [49] , [52] , [53] , [54] , [55] , [56] , [57] Inthanon Zone including Bentong Raub [44] , [47] , [49] Lhasa [58] Truong Son [59] , [60] Lead [41] , [59] , [61] , [62] , [63] . 207 Pb/ 204 Pb (i) against 206 Pb/ 204 Pb (i) (Fig.…”

Geochemical evolution of structure-bedding controlled hydrothermal dolomites of the Kinta Valley, Western Malaysia

“…This event occurred prior to the onset of the dolomitizations resultant from successive thermo-tectonic events. This high-temperature diagenetic event was associated with a distant submarine Permian volcanic event near Central Range (Basori et al 2017) that supplied hydrothermal fluids hot enough to alter REE signatures into positive Eu anomaly (Bau and Dulski 1999;Frimmel 2009;He et al 2006).…”

Geochemistry of Sphalerite from the Permian Volcanic-Hosted Massive Sulphide (VHMS) Deposits in the Tasik Chini Area, Peninsular Malaysia: Constraints for Ore Genesis

“…The Lebir Fault Zone is a suture zone marking the closed back-arc basin developed on the margin of the Permian East Malaya volcanic arc between the Central and Eastern Belts [33,41]. Based on geochemical, geochronological, Pb, and S isotopic characteristics and fluid inclusions data of the Permian VHMS deposits in the Tasik Chini area, the formation could have accompanied this back-arc basin evolution (e.g., [33,38,[42][43][44][45]).…”

“…This result strongly suggests that the mixing of sulphur and metal carrying fluids was a crucial process for ore formation in the Tasik Chini VHMS deposits. The mixing of different fluids (seawater dominant and minor magmatic fluids), based on the S, Pb isotopes of sulphide minerals and pyrite chemistry data, is considered responsible for controlling the chemistry of the sphalerite at both the Bukit Botol and Bukit Ketaya deposits [42][43][44], similar to the Eskay Creek VHMS deposit, Canada, as was suggested by [63]. Furthermore, the complex relationship of Zn/Cd ratios in sphalerite between the Bukit Botol and Bukit Ketaya deposits is also interpreted probably due to the differences in temperature, pH, salinity, pressure, and aFeS (average FeS content) contributions during their deposition as reported in other similar deposits (e.g., [13]).…”