Wan Mastura Wan Ibrahim
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Preferred name
Wan Mastura Wan Ibrahim
Official Name
Wan Mastura, Wan Ibrahim
Alternative Name
Mastura Wan Ibrahim, Wan
Ibrahim, W. M.H.W.
Ibrahim, Wan Mastura Wan
Main Affiliation
Scopus Author ID
56526451500
Researcher ID
AGI-2890-2022

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  • Publication
    Buffalo reef mesothermal gold mineralization mineralogy and geochemistry in Kuala Lipis, Pahang, Malaysia
    (Springer, 2023)
    Siti Hasanah Osman
    ;
    Afikah Rahim
    ;
    Wan Mastura Wan Ibrahim
    In Pahang, the East Coast of Peninsular Malaysia, Buffalo Reef remains active as a gold mine among the main gold deposits at the North of Selinsing Gold Mine. Mineralization of gold is possible when stibnite occurs in quartz veins. The main purpose of this study is to examine the geological condition governing the mineralization of ore and the origin of gold mineralization of Buffalo Reef. The XRD result shows the quartz stage (SiO2) while quartz, sillimanite and stibnite are identified. Ten samples were tested with XRF geochemical studies showing SiO2 contents of 24.98–70.67 wt%, and the overall Na2O + K2O diagram versus SiO2 alkaline diagram showed varies basaltic andesite, andesite and dacite series with favourable and random distribution. The deposits region consists of the thick Permian rock sequences especially tuff volcanic rock that is intertwined by clay (argillite, phyllite) and carbonate rocks. Mineralization of volcanic rock and pyroclastic tuff supporting and regulating the orogenic gold deposit under the Raub–Bentong framework. The region epizoic and mesonic with a mesothermal deposit characterized by the presence of gold, stibnite and arsenopyrite with the grade of gold is 4.01 g/t Au from AAS.
  • Publication
    Petrographical analysis on microcracks and Delayed Ettringite Formation (DEF) of saltwater intruded concrete
    (Springer, 2023)
    Muhammad Noor Hisyam Jusoh
    ;
    Afikah Rahim
    ;
    Karthigeyan Ramanathan
    ;
    Rini Asnida Abdullah
    ;
    Goh Thian Lai
    ;
    Wan Mastura Wan Ibrahim
    The purpose of this study is to analyze deteriorated concrete samples from a port that located at southwest of Johor. The structure is exposed to aggressive environment which is seawater. Seawater contains chloride and sulfate which can promote to the concrete and structure deterioration due to chemical and mechanical reactions. Microstructural study which is petrographic analysis is aimed to examine the presence of microcrack and delayed ettringite formation (DEF) in micro-sized scale. Microcrack and DEF images are identified under polarizing microscope. The other method is used X-ray diffraction method as to determine the mineral content while rebound hammer test validates the mechanical strength of the port’s structure. Microcracks and zonal boundaries are obviously observed in relation to the DEF content to samples with low mechanical strength. DEF is proven its growth with the 5.7–10.4% of mineral composition, especially ettringite caused the material strength reduced.
      5  4
  • Publication
    Experimental analysis of geological structure to the water intrusion into tunnel
    (Springer, 2023-07)
    M. I. Zalrusli
    ;
    Afikah Rahim
    ;
    Karthigeyan Ramanathan
    ;
    Rini Asnida Abdullah
    ;
    Thian Lai Goh
    ;
    Wan Mastura Wan Ibrahim
    This paper presents a geological characteristic in Karak for water transfer tunnel. A dense population that exists year by year in the urban area created a problem which is high demand water consumption. In order to avoid running out of water in the future, the government has planned to make a water transfer tunnel that connects from catchment area from Karak to Langat. The objectives of this study are to study the joint pattern and overburden at NATM-2 and to investigate the relationship between joint pattern, overburden, and water inrush. Fieldwork has been carried out to collect the data from the site. The data collected is tunnel face mapping. From the data, we can accomplish the objective needed. Analysis for this study involved the analysis of the structural map, geological map, tunnel face mapping along 1927 m of total length at NATM-2. The geological structures especially in the strength and water inrush that presents within meta-sedimentary rock have affected the excavation process and decreased the tunnel performance. Three types of joints orientations observed are parallel with the main lineament orientation, perpendicular to the tunnel, and crossing random voids. Most water inrush occurrences are seen as in line with the joint sets orientation which are parallel orientations, perpendicular to the tunnel drive direction and 1 most least is cross voids that crossing with random pocket water zones.
      4  1