Utilization of rock dust to produce roof tiles and its effects on properties tiles, mixed with red clay collected from Naogaon district Bangladesh were investigated. After proper characterization the raw materials, prepared different percentages (10-50%) sintered 850-1100 °C temperature. Rock has been found good for using as fluxing material after XRF study. The samples tested such water absorption, porosity, mechanical strength, linear shrinkage, bulk density. strength values have exceeded...

Sand mining using dredging technology from channel bars is a common technique worldwide. To minimize adverse effects of dredging, geo-engineering nature the soil should be evaluated before mining. Therefore, present study deals with potential risks associated for mineral sand extraction by analyzing engineering geological properties Brahmaputra River bar and surrounding areas, Bangladesh. A detailed analysis was conducted field laboratory testing methods, including Standard Penetration Tests...

Background: Penetrating corneal injury is a full thickness penetration of the cornea. Early management can regain useful final visual acuity and prevent blindness by reducing complications. Objective: To evaluate relationship between presenting & in penetrating patients. Methods: This prospective observational study was aimed to (VA) patients, where 104 eyes were studied National Institute Ophthalmology Hospital (NIO&H) from year 2021 2023. Detailed ophthalmic examinations patients...

Zircon is always found in association with Ti-rich minerals; therefore, it produced mainly as a co-product the production of ilmenite and rutile from placer mining operations. In Cox's Bazar beach sands, they contain at 2.8, 12.1 2.7 wt% (average) respectively heavies. order to scrutinize mineralogical geochemical variability among Zr- Ti- rich minerals, XRF, XRD, SEM EPMA were implemented. Petrogenesis manifests nature impurities mineral concentrates where included through cationic...

Abstract We report the first record of Great Himalayan leaf-nosed bat, Hipposideros armiger from a cave in Chittagong Hill Tracts Bangladesh. confirmed its identity using morphometric measurements and visual observations supplemented with photographs. This steps up number national bat fauna, suggesting countrywide surveys for comprehensive inventory bats

The sands of Bangladesh's rivers are potentially economically important hosts for heavy mineral (HM) resources. Characterisation tests carried out by the authors on 50 sand samples collected from bars Brahmaputra River in northern Bangladesh revealed that HM assemblage predominantly quartz-rich ranged 4.5 to 17.0% (by weight) HM. tested comprised amphibole, epidote, garnet, kyanite and feldspars along with minor amounts valuable (VHM) components ilmenite, magnetite, rutile zircon. HMs were...

Sediments from stable sand bars along a 40 km section of the Brahmaputra River in northern Bangladesh were analyzed for their major, trace and rare earth element contents to determine provenance, compositional maturity, source area weathering tectonic setting. Geochemically, sediments classified as litharenites Index Compositional Variability (ICV) varied between 1.4 2.0, indicating low mineralogical maturity. A high mean SiO2 concentration (72.9 wt.%) Al2O3 (11.1 consistent with abundance...

Alluvial mineral sands rank among the most complex subjects for characterization due to diverse range of minerals present in sediments, which may collectively contain a daunting number elements (>20) major or minor concentrations (>1 wt%). To comprehensively characterize phase abundance and chemistry these specimens, method was developed using hyperspectral x-ray cathodoluminescence mapping an electron probe microanalyser (EPMA), coupled with automated cluster analysis quantitative...

Hatiya is the second largest island of Bangladesh and situated near Meghna River estuary in central coastal zone Bangladesh. This hosts a few scenic beaches with huge deposit mineral sands. Representative sand samples from various this were collected during year 2019, analyzed for different mineralogical contents using state-of-the-art techniques, such as WD-XRF, XRD, SEM EDX. study determined contents, SiO2 (73.58%), micas (40.30%), Al2O3 (12.13%), TiO2 (0.56%), MgO (1.31%), Fe2O3 (4.71%),...

Bangladesh (a low-income country) has a significant number of people dependent on alms for daily survival. These people, who we address as extremely impoverished (EIP) are deprived even basic healthcare. Their extreme levels poverty, coupled with low literacy skills, and complete lack access to technology means that they unaware existing low-cost/free healthcare services (as arranged by local hospitals) available EIPs. In this paper, gap carefully-crafted solution, Dakter Bari term in...

Surface and borehole sampling along a ∼80 km section of the lower Tista river, northwestern Bangladesh, indicated that river sands offer significant potential as heavy mineral (HM) resource. Characterisation sediments from surface to 15 m depth showed sand-sized component was dominated by quartz, feldspar, mica, lithic fragments, amphibole pyroxene group minerals. The most common particle size between +125–500 μm with 84 wt-% all material reporting this range. Laterally spaced slight grain...

A study into the possible separation of feldspar from quartz in a Bangladesh river sand sample was undertaken with aim producing high-grade product for potential use glassmaking. Flotation used to upgrade two concentrates, sizings +250 µm and −250 µm, Brahmaputra River. Feldspar floated using dodecylamine as collector an acidic circuit at pH 2–2.5 after mica prefloat. For fraction, best quality assayed 96.8 wt% SiO2 1.95 Al2O3 46.7 feed recovered content 89.1 quartz. test on which firstly...

This study focuses on mineralogical and chemical characterization of clay Sitakunda anticline, Bangladesh potential suitability this shale as raw materials in ceramic industries. The which is texture composed chlorite kaolinite with common illite, smectite, quartz, mica feldspar. There are two types samples color, grey red. Chemical compositions analyzed by XRF composition sample XRD. Clay contain significant amount SiO2, Al2O3 Fe2O3 other minor compounds. plasticity index (12.08 16.37)...

The Tista River originates from the Himalaya Mountain, flows through Bangladesh and makes itself as largest tributary of Brahmaputra-Jamuna River, having huge sand deposits with valuable minerals. present work implies economic viability measuring heavy mineral concentration comparing other established marking cut-off grade prices these study shows that average content minerals is 8.26%, containing garnet, ilmenite, magnetite, rutile, zircon micas. selected oxides in form are SiO2, MgO, K2O...

The present investigation deals with the glass sand potentiality of barsediments Tista and Dharla rivers from different locations Nilfamari,Lalmonirhat Kurigram districts, Bangladesh. Accordingly, fourteen sampleswere selected for grain size distributions separation magnetic minerals.Magnetic mineral content ranges about trace amount to 0.06 wt%. Lightminerals separated by tetrabromoethane technique ranging 88 98 Moreover, as final products flotation process evaluationranges 58 80 wt%, which...

The research focuses on the utilization of hard rock dust for formulating ceramic glazes. was collected from Maddhapara Granite Mining area, Dinajpur, Bangladesh. Chemical compositions raw materials were analyzed by XRF. Rock is characterized high SiO2, K2O, and Na2O with low content ferromagnesian element. For minor amounts components may be presents, which will mostly affect color fired product (Fe2O3, MnO, TiO2, Cr2O3).Others (MgO, Na2O) act as fluxes have a strong effect during...