High Ba igneous rocks from the Central Belt of Peninsular Malaysia and its implication

Ghani, Azman A.; Ramesh, V.; Yong, B.T.; Ghani, Ramesh T. T. Azman A.; Muda, Shafari

doi:10.7186/bgsm45200207

Cited by 3 publications

(6 citation statements)

References 12 publications

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“…The Benom complex is composed of alkaline series with intermediate to mafic igneous rocks and calc-alkaline series made of granitic rocks (Jaafar Ahmad, 1979). The igneous complex has prompted the interest of researchers on the occurrences and the origin of the alkaline series (Hutchison, 1971;Jaafar Ahmad, 1979;Mohd Rozi Umor & Syed Sheikh Almashoor, 2000;Ghani et al, 2002;Ghani et al, 2006), which mostly appear to be located along the western and northwestern flanks of Gunung Benom (Figure 2). The petrogenesis and magmatic source origin of the alkaline and calc-alkaline series are considered different based on previous petrological and geochemical studies (Mohd Rozi Umor, 2008).…”

Section: Benom Complexmentioning

confidence: 99%

“…The alkaline series are characterized by a high potash content, very high large ion lithophile elements (LILE), i.e. Ba and Sr, and the concentration of the Ba has recorded >10,000ppm (Ghani et al, 2002;Ghani et al, 2006). The geodynamic origin of these igneous bodies has been debated, given the small volume of mantle material being enriched in LILE (i.e.…”

Section: Alkaline Seriesmentioning

confidence: 99%

“…The geodynamic origin of these igneous bodies has been debated, given the small volume of mantle material being enriched in LILE (i.e. Ba and Sr in this case) that penetrated the lower lithosphere (Ghani et al, 2002). The upwelled mantle material might be associated with the partial melting of eclogite (Mohd Rozi Umor & Syed Sheikh Almashoor, 2000) possibly resulting from a slab break-off (Mustaffa Kamal Shuib & Ghani, 2003;Mohd Rozi Umor, 2008).…”

Section: Alkaline Seriesmentioning

confidence: 99%

“…The alkaline series of the Benom Complex were emplaced in the vicinity of Raub around 226.6-221.8 Ma and their chemical signature indicates partial enrichment in LILE from the mantle (Ghani et al, 2002). The LILE enrichment fluids were derived from the partial melting of (probably metasomatised) peridotite and later migrated to the lower crust (Ghani et al, 2006) during slab break-off (Mohd Rozi Umor, 2008;Mustaffa Kamal Shuib & Ghani, 2003) (Figure 6A).…”

Section: Late Triassic Uplift: Termination Of Deep Marine Sedimentation Red Beds Deposition and Benom Complex Emplacementmentioning

confidence: 99%

See 3 more Smart Citations

Zircon U-Pb ages of the Benom Complex: Implications for a Late Triassic uplift event in Central Peninsular Malaysia

Choong¹,

Pubellier²,

Sautter³

et al. 2021

BGSM

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Over two decades, analysis of seismic attributes had been an integral part of seismic reflection interpretation. Seismic attributes are an influential assistance to seismic interpretation, delivering geoscientists with alternative images of structural (faults) and stratigraphic features (channels), which can be utilised as mechanisms to identify prospects, ascertain depositional environment and structural deformation history more rapidly even provide direct hydrocarbon indicators. The additional steps are obligatory to compute and interpret the attributes of faults and channels from seismic images, which are often sensitive to noise due to the characteristically computed as discontinuities of seismic reflections. Furthermore, on a conventional seismic profile or poor quality data, faults and channels are hard to visible. The current research review these geological structures through a case study of 3D seismic data from N-field in the viewpoint of Malay Basin. This study aimed to characterise the structure and stratigraphic features by using seismic attributes on the N-field below seismic resolution. Also, two different methods are proposed to improve seismic reflections, i.e., faults and channels that are hard to see on the conventional 3D data set. The first method, to detect faults in seismic data, which this paper employs the ant tracking attribute as a unique algorithm to be an advanced forwarding that introduces a new tool in the interpretation of fault. The effective implementation of ant tracking can be achieved when the output of other faults sensitive attributes are used as input data. In this work, the seismic data used are carefully conditioned using a signal. Chaos and variance that are sensitive to faults are applied to the seismic data set, and the output from these processes are used as input data that run the ant tracking attribute, which the faults were seen difficult to display on the raw seismic data. Meanwhile, for the second method, spectral decomposition was adopted to deliberate the way its method could be utilised to augment stratigraphic features (channels) of the N-field, where the channel is ultimately considered being one of the largest formations of the petroleum entrapment. The spectral decomposition analysis method is an alternative practice concentrated on processing S-transform that can offer better results. Spectral decomposition has been completed over the Pleistocene channels, and results propose that application of its methods directs to dependable implications. Respective channel in this area stands out more obviously within the specific frequency range. The thinner layer demonstrates higher amplitude reading at a higher frequency, and the thicker channel displays higher amplitude reading at a lower frequency. Implementation of spectral decomposition assists in deciding the channels that were placed within incised valleys and helps in recognising the orientation and the relative thickness of each channel. By doing this, the ant tracking attribute and spectral decomposition approach have generated the details of subsurface geologic features through attributes by obtaining enhanced reflections and channels and sharpened faults, respectively.

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Section: Benom Complexmentioning

confidence: 99%

Section: Alkaline Seriesmentioning

confidence: 99%

Section: Alkaline Seriesmentioning

confidence: 99%

Section: Late Triassic Uplift: Termination Of Deep Marine Sedimentation Red Beds Deposition and Benom Complex Emplacementmentioning

confidence: 99%

See 2 more Smart Citations

Zircon U-Pb ages of the Benom Complex: Implications for a Late Triassic uplift event in Central Peninsular Malaysia

Choong¹,

Pubellier²,

Sautter³

et al. 2021

BGSM

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show abstract

“…The complex occurs very close to the Bentong-Raub line, which may suggest an underlying structural control for its emplacement. Geochemical study shows that the alkalic series rocks of the complex contain very high contents of large ion lithophile elements (Ba and Sr) (Azman et al 2002(Azman et al , 2003Mustaffa Kamal & Azrnan 2003;Azman & Mustaffa Kamal 2004). This paper describes the outcrop of the new road cut that by-passes Benta town, built in 2004.…”

Section: General Geologymentioning

confidence: 99%

Field Evidence of Magma Mixing in Plutonic Rock from the Benom Complex, Central Belt of Peninsular Malaysia

Ghani¹

2006

BGSM

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The a lka li c seri es of th e Benom Co mpl ex, Pahang, consists of monzonite, syenite and ga bbro ic rock. The contact between mon zonite and gabbroi c rock suggest th at both magmas are mi xed. Ev idence of th e mi x ing ca n be seen at th e new roadcut outcrop a long the Benta town ship bypass such as dispersion of K-fe ld spar from monzonite in the gabbroic rock. The end stage of this dispersion is the free sw imming of K-fe ld spa r indi vidual crystals in the gabbroic material. Thi s stru cture is interp reted as th e result of mechanical tra nsfer durin g the ma fi c-fe lsic magma interaction and mix ing event. A ll these fea tu res suggest an ori gin for the alka li c in termedi ate rocks of the Benom Complex invo lvi ng a magma mi x ing process ..

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Distribution of natural radioactivity in different geological formations and their environmental risk assessment in Malaysia

Seow,

Mohan Viswanathan,

Dodge-Wan

2024

Environ Sci Pollut Res

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Labuan, Miri, Kundasang and Raub regions of Malaysia have very different geological formations and settings that could result in different levels of natural radioactivity. Hence, this study determines the influence of different geological formations on radioactivity in these locations using field measurements, petrology and geochemistry. A total of 141 gamma dose rates and 227 beta flux measurements were collected using Polimaster survey meters (PM1405) in these four regions. The gamma dose rate values range from 0.37 to 0.05 µSv/h with a mean value of 0.11 µSv/h. Beta flux values range from 3.46 to 0.12 CPS with a mean value of 0.57 CPS. Mineralogy and elemental composition of the different rock types were analysed using thin-section petrography, XRD, ICP and pXRF methods. Felsic igneous rocks such as syenite and granite have higher natural radioactivity and contain more radionuclide-bearing minerals such as apatite, zircon, allanite, K-feldspar, titanite, muscovite and biotite. Metamorphic rocks have the second highest natural radioactivity and contain fewer radioactive minerals. The natural radioactivity of sedimentary rocks mostly depends on their clay content. The gamma dose rate maps show that igneous and metamorphic regions around Raub have higher radioactivity compared to the sedimentary-dominated regions around Miri and Labuan. Annual effective dose (AED) and excess lifetime cancer risk (ELCR) were calculated to evaluate the potential health risk for inhabitants of these regions. Labuan and Miri are considered to be safe zones with respect to natural radioactivity as the results show little to no risk for the public, compared with the Raub region, which is medium to high risk.

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High Ba igneous rocks from the Central Belt of Peninsular Malaysia and its implication

Cited by 3 publications

References 12 publications

Zircon U-Pb ages of the Benom Complex: Implications for a Late Triassic uplift event in Central Peninsular Malaysia

Zircon U-Pb ages of the Benom Complex: Implications for a Late Triassic uplift event in Central Peninsular Malaysia

Field Evidence of Magma Mixing in Plutonic Rock from the Benom Complex, Central Belt of Peninsular Malaysia

Distribution of natural radioactivity in different geological formations and their environmental risk assessment in Malaysia

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