Bulletin of the Geological Society of Malaysia最新文献

{"title":"Peat Soil Engineering And Mechanical Properties Improvement Under The Effect Of EKS Technique At Parit Kuari, Batu Pahat, Johor, West Malaysia","authors":"Abdul Wahab, Zaidi Embong, M. Hasan, H. Musa, Q. Zaman, H. Ullah","doi":"10.7186/bgsm70202011","DOIUrl":"https://doi.org/10.7186/bgsm70202011","url":null,"abstract":"This study focused on the stabilization of peat soil and its engineering and mechanical properties improvement such as shear strength, moisture content, liquid limit and shear wave velocity. Peat is considered as weak foundation soil as they have low shear strength, high compressibility and high moisture content. One of the major problems for the construction industries in Malaysia is slope instability, bearing capacity failure and excessive settlement foundation for the development of highways and buildings when its undertaken-on peatland. Malaysia contains about 3 million hectares peatland which cover 8% of its total land. Therefore, it is essential to find an appropriate way to enhance its properties and to ensure the reduction and solution of these problems can finally solve by applying the electrokinetic stabilization (EKS) method. The peat soil samples were collected from Parit Kuari, Batu Pahat, Johor, Malaysia. In the proposed technique, the voltage gradient of 110 and 150 V was applied for the period of 3 and 6 hours. Some laboratory parameters such as shear strength, moisture content (MC), liquid limit, and shear wave velocity were observed for pre as well as for post-EK. It was observed that strength was found significantly improved from 11.66 to 70 kPa, MC was reduced from 613.989 to 270.294%, liquid limit was increased from 159.261 to 217.603%, and shear wave velocity was improved from 68.5 to 110.5 m/s. A significant improvement has been observed in the physical properties of the peat soil by applying the progressive approach showing the robustness of the methodology.","PeriodicalId":39503,"journal":{"name":"Bulletin of the Geological Society of Malaysia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43564493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A contemporary review of sedimentological and stratigraphic framework of the Late Paleogene deep marine sedimentary successions of West Sabah, North-West Borneo","authors":"Muhammad Jamil, A. Rahman, N. Siddiqui, Noor Azahar Ibrahim, N. Ahmed","doi":"10.7186/bgsm69202005","DOIUrl":"https://doi.org/10.7186/bgsm69202005","url":null,"abstract":"","PeriodicalId":39503,"journal":{"name":"Bulletin of the Geological Society of Malaysia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49050663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Distribution of ground motion seismic surface wave of the 2015 shallow strong earthquake at Ranau central zone seismically active region, Sabah, Malaysia","authors":"Bailon Golutin, Sabah Locked Bag Kota Kinabalu Sabah Malaysia Geoscience Malaysia","doi":"10.7186/bgsm69202006","DOIUrl":"https://doi.org/10.7186/bgsm69202006","url":null,"abstract":"","PeriodicalId":39503,"journal":{"name":"Bulletin of the Geological Society of Malaysia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43369048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"“Fractured basement” play in the Sabah Basin? – the Crocker and Kudat formations as hydrocarbon reservoirs and their risk factors","authors":"M. Madon, F. Kessler, J. Jong, M. Amin, G. GoldbachGeoconsultantsO, One Residences Jalan Satu Chan Sow Lin Kl Malaysia A","doi":"10.7186/bgsm69202014","DOIUrl":"https://doi.org/10.7186/bgsm69202014","url":null,"abstract":"Exploration activities in the Sabah Basin, offshore western Sabah, had increased tremendously since the discovery of oil and gas fields in the deepwater area during the early 2000s. However, the discovery rates in the shelfal area have decreased over the years, indicating that the Inboard Belt of the Sabah Basin may be approaching exploration maturity. Thus, investigation of new play concepts is needed to spur new exploration activity on the Sabah shelf. The sedimentary formations below the Deep Regional Unconformity in the Sabah Basin are generally considered part of the economic basement which is seismically opaque in seismic sections. Stratigraphically, they are assigned to the offshore Sabah “Stages” I, II, and III which are believed to be the lateral equivalents of the pre-Middle Miocene clastic formations outcropping in western Sabah, such as the Crocker and Kudat formations and some surface hydrocarbon seeps have been reported from Klias and Kudat peninsulas. A number of wells in the inboard area have found hydrocarbons, indicating that these rocks are viable drilling targets if the charge and trapping mechanisms are properly understood. This study assesses the potential and risks of a conceptual “basement” hydrocarbon play in the Crocker and equivalent formations in the Sabah Basin.","PeriodicalId":39503,"journal":{"name":"Bulletin of the Geological Society of Malaysia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43860410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Geomorphological assessment of past landslides in tropical highlands – Case studies from Cameron Highlands and Kundasang, Malaysia","authors":"T. Jamaluddin, N. Sulaiman, N. S. M. Nazer","doi":"10.7186/bgsm69202010","DOIUrl":"https://doi.org/10.7186/bgsm69202010","url":null,"abstract":"Past landslides are old landslides, probably decades or hundreds of years ago that could be reactivated by their original causes or other causes. Their occurrences are often overshadowed by topographic complexity and dense vegetation cover in the hilly tropical terrain. Basic skills in geomorphology and experience is needed to recognize and identify this type of landslide because the associated geomorphic features tend to be mollified by intense tropical weathering, erosion and rapid sedimentation of the tropical region. Infrastructural developments encroached into the hilly terrains of Malaysia recently has indirectly expose various geotechnical problems and geodisaster risks due to reactivation of the past landslides. Landslides often produced visible signs and can be identified through detailed observation on the morphology and hill slope topography. The aid from new and advanced remote sensing technology and drone photogrammetry making geomorphological observation of past landslide in remote natural terrains easier and more convincing. A landslide, whether new or past, is often characterized by an assemblage of distinct geomorphic features depending on its type, size, age and scale of observation. Features like arcuate crown and main head scarp, side scarps, concave upper slope, convex lower slope and followed by undulating hummocky topography near toe are amongst the main signature to identify the existence of landslides geohazard. Other signs inclusive of colluvial deposit at the foot of the slope or in the downstream floor valey, Y-shaped bifurcating streamlets in the upstream, the existence of stepped terraces, different vegetation cover to the slope counterparts, can also be used to identify and to estimate the relative age of past landslides, either young, mature or old. Geomorphological assessment from Cameron Highlands and Kundasang areas are presented herein as a guide to recognize and identify the existence of past geohazard and mapped into landslide inventory as part of fundamental information for geohazard.","PeriodicalId":39503,"journal":{"name":"Bulletin of the Geological Society of Malaysia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48273620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sand injectites in the West Crocker Formation, Kota Kinabalu, Sabah","authors":"M. Madon","doi":"10.7186/bgsm69202002","DOIUrl":"https://doi.org/10.7186/bgsm69202002","url":null,"abstract":"","PeriodicalId":39503,"journal":{"name":"Bulletin of the Geological Society of Malaysia","volume":"45 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141201787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mineralogical and geochemical properties of bricks from Sungai Batu monuments","authors":"Ratnah Wati Mohd Rapi, Ahmad Fadly Jusoh, M. Saidin","doi":"10.7186/bgsm69202013","DOIUrl":"https://doi.org/10.7186/bgsm69202013","url":null,"abstract":"","PeriodicalId":39503,"journal":{"name":"Bulletin of the Geological Society of Malaysia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49613133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Ukay Perdana Shear Zone in Kuala Lumpur: A crustal-scale marker of early Jurassic orogenic deformation in Peninsular Malaysia","authors":"A. Leslie, M. Dobbs, T. Ng, Q. A. Rosle, Muhammad Ramzanee Mohd Noh, Thomas J. H. Dodd, M. Gillespie","doi":"10.7186/bgsm69202012","DOIUrl":"https://doi.org/10.7186/bgsm69202012","url":null,"abstract":": A ‘top-to-the-east’ ultramylonite zone is identified in north-eastern Kuala Lumpur and named here as the ‘Ukay Perdana Shear Zone (UPSZ). The UPSZ is at least 250–300 m thick, east-verging, and superimposed on the later stages of assembly of the c. 200 Ma S-type ‘Western Belt’ granite plutons generated by crustal thickening and assigned to the Main Range Granite Province. Younger bodies of S-type granitic rocks cut the shear zone. These intensely deformed quartzofeldspathic rocks contain distinctive relict porphyroclasts of perthitic K-feldspar (microcline), oligoclase and quartz, entrained within the ultramylonitic fabric. Migrating sub-grain boundaries in quartz indicate deformation occurred under moderate to high temperature conditions during ductile deformation ( c. 500–600°C); undulose extinction suggests down-temperature evolution of the deformation history. This deformation event implies that the final stages of collisional interaction between Sibumasu and the Sukhothai Arc would have involved now east-directed (080°N, then generally northward) over-thrusting of the leading edge of Sibumasu onto the granitic aligned foliated granitic mylonite, K-feldspar; lineated granitic mylonite, dips 60°","PeriodicalId":39503,"journal":{"name":"Bulletin of the Geological Society of Malaysia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49338936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Integration of field mapping, lineament interpretation and electrical resistivity tomography survey to characterize granitic rock mass lining by shotcrete","authors":"H. Hussin, M. H. Arifin, T. Jamaluddin, Muhammad Fahmi Abdul Ghani, N. Ismail, Abdul Manan Abdullah","doi":"10.7186/bgsm69202004","DOIUrl":"https://doi.org/10.7186/bgsm69202004","url":null,"abstract":"Rock mass characterization is important to identify the condition of rock especially in major infrastructure like a tunnel. Rock mass characterization can be done either before, during or after construction completed. In this case study, this characterization was done after almost 20 years of tunnel operation. Characterization could not be done directly to the field as half of the rock mass along tunnel was covered by shotcrete layer. To overcome this problem, three integration methods which are field mapping, satellite image interpretation and geoelectrical tomography resistivity survey been approached. Satellite image interpretation is to emphasise negative lineament structure tracing while field mapping is to emphasis the location of groundwater intrusion and major tectonic structures like fault, joint and shear zone. Geoelectrical tomography resistivity survey was conducted using ABEM SAS 400 system and dipole-dipole array while raw data were processed using Res2DINV software. Data analysis showed three difference resistivity values which are high resistivity (> 1500 Ω.m), moderate (100-500 Ω.m) and low (<25 Ω.m). Findings from field mapping and lineament interpretation were used to interpret pseudosection. All three resistivity values were interpreted as high water content zone (low resistivity), lineament effected and highly fractured granitic rock mass (moderate resistivity) and low fractured granitic rock (high resistivity).","PeriodicalId":39503,"journal":{"name":"Bulletin of the Geological Society of Malaysia","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43067382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization and genesis of soils derived from sedimentary rocks in the Crocker Formation, Sabah, Malaysia","authors":"Wong Mum Keng, Paramananthan Selliah, Ng Tham Fatt, M. A. Hassan","doi":"10.7186/bgsm69202011","DOIUrl":"https://doi.org/10.7186/bgsm69202011","url":null,"abstract":"Soil properties in three rain forest types and six different elevations (921, 1173, 1317, 1556, 1727 and 1932 m above sea level) were studied at Mount Alab, Sabah. The chosen study site consisted of soils derived from sedimentary rocks of the Crocker Formation aged from Late Eocene to Early Miocene. Results of this study showed that soils with difference in elevation demonstrated considerable variations in term of morphological and physicochemical properties depending on the nature of the parent materials. At the highest elevation, the soil profile presented with a thin surface organic layer. On the other hand, the soils changed from Inceptisols to Ultisols with decreasing elevation. All soils were moderately acidic with an abundance of sand in these soil profiles due to the dominance of sandstones in their parent materials. Clay fraction of these soil profiles was dominated by clay-sized quartz while illite, kaolinite, interstratified illite-vermiculite, gibbsite and vermiculite were present in low or minor amounts. The chemical properties of the soils were significantly affected by topographical positions. The highest value of total organic carbon and total nitrogen were obtained at the summit, whereas, toeslope had relatively more exchangeable calcium and aluminium. Therefore, soil quality was better at higher topographical positions in this study.","PeriodicalId":39503,"journal":{"name":"Bulletin of the Geological Society of Malaysia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45709493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}