Geochemistry of Pyritic Mudstones from the Singa Formation, Malaysia: Insights into Gold Potential, Source of Sulfur and Organic Matter

Major trace element analyses, including pyrite chemistry of pyritic mudstones shallow-marine Singa Formation Pennsylvanian–Early Permian age have been carried out to assess gold potential, the source sulfur and organic matter. Regionally, spatially correlates with Bohorok (Sumatra, Indonesia), Kaeng Krachang group (Thailand), Lebyin (Burma or Myanmar). In Southeast Asia, this formation is important because it has a record glacial processes that occurred along northern margin Gondwana in Late Paleozoic age. This study revealed Formation, which contain lonestones origin, deposited under suboxic–oxic conditions shallow marine environment during time. The black total carbon ranges from 0.1 0.7 wt.%, content varying 40 62 ppb, making them rocks. diagenetic presence early generations (pyrites 1, 2, 3) these ranging up 1.6 ppm Au indicative enrichment gold. Conversely, late 4, 5, 6) low 0.5 Au. δ34S values for grains range −24.6‰ +6.2‰ likely indicate combination magmatic biogenic sulfur. Organic isotope composition pebbly mudstone samples shows wide −23.9‰ −5.8‰ indicating mixed terrestrial source.