minerals Article Impact of Paleosalinity, Paleoredox, Paleoproductivity/Preservation on the Organic Matter Enrichment in Black Shales from Triassic Turbidites of Semanggol Basin, Peninsular Malaysia Zulqarnain Sajid 1,* , Mohd S. Ismail 1, Muhammad Noor Amin Zakariah 1, Haylay Tsegab 1 , José Antonio Gámez Vintaned 1 , Tanzila Hanif 2 and Nisar Ahmed 1 1 Geosciences Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, Perak 32610, Malaysia;
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[email protected]; Tel.: +60-1-6288-3461 Received: 8 August 2020; Accepted: 9 September 2020; Published: 16 October 2020 Abstract: Turbidite-associated black shale of the Semanggol Formation is extensively distributed in the northwestern part of the Western Belt, Peninsular Malaysia. The black shale occurs as a dark grey to black and thick to medium-bedded deposit. It represents the distal part of submarine fan system (outer-fan) overlying interbedded sandstone to shale facies of the mid-fan and conglomeratic pebbly sandstone facies of the inner-fan. Field observations and its widespread occurrence have resulted in the black shale being considered as a potential analog for a source rock in offshore Peninsular Malaysia. The present study includes detailed mineralogical (XRD, SEM, and EDX analysis), inorganic geochemical (major oxides, trace elements TEs, and rare earth elements REEs), and Rock-Eval pyrolysis analyses of the black shale samples, collected from the Gunung Semanggol, Bukit Merah, and Nami areas in northwestern Peninsular Malaysia.