@article{scholars10632,
            year = {2018},
       publisher = {Slovnaft VURUP a.s},
         journal = {Petroleum and Coal},
           pages = {446--452},
          number = {3},
            note = {cited By 0},
          volume = {60},
           title = {Lithological variations in black shales and mudstone formations of central Sarawak, Malaysia},
             url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85087787011&partnerID=40&md5=53f0e10555d31352fcbe23eeb9463467},
        abstract = {This paper examines the Cretaceous-Upper Pliocene shale and mudstone outcrops in Central Sarawak. Related geological studies focused basically on sandstone and coals of Sarawak Basin, with no comprehensive outcrop study on lithological variations in the black shales and mudstone formations. Detailed lithological variations of these formations will allow us discretize potential shale gas intervals. Therefore, the aim of this study is to investigate the field geological characteristics of the Black shales and mudstone formations of Central Sarawak by using outcrop description, sedimentary log analysis, spectral gamma ray (SGR) data and geochemical characteristics (TOC ) of the selected mudstones and black shales. The study covers Nyalau, Tatau, Begrih, Liang and Belaga formations. Representative samples of the formations were subjected to detailed description in terms of lithology, structures and stratigraphy. Features such as laminations, sandstone intercalations, coal lenses, iron nodules, phyllite inclusions and fault structures were identified in the black shale and mudstone. The lowest U (ppm) was recorded for Belaga Formation, which can be attributed to the low grade metamorphism of the Formation, whereas the higher U (ppm) in Tatau and other formations is possibly due to their relatively higher clay content. The TOC values for all formations varied from 0.8 to 3.17, suggesting they have fair to good hydrocarbon generative potential. {\^A}{\copyright} 2018 Slovnaft VURUP a.s.},
            issn = {13377027},
          author = {Ibrahim, W. E. and MD Rafek, A. G. and Salim, A. M. A.}
}