Surface and borehole sampling along a ∼80 km section of the lower Tista river, northwestern Bangladesh, indicated that the river sands offer significant potential as a heavy mineral (HM) resource. Characterisation of sediments from the surface to 15 m depth showed that the sand-sized component was dominated by quartz, feldspar, mica, lithic fragments, amphibole and pyroxene group minerals. The most common particle size was between +125–500 μm with 84 wt-% of all material reporting to this size range. Laterally spaced sampling indicated slight grain size coarsening upstream. Heavy liquid separation studies revealed that HMs such as amphiboles, micas, garnets, aluminosilicate (Al2SiO5) phases, ilmenite and zircon made up ∼10.99% (on average). The percentage of valuable HMs (ilmenite, rutile, zircon, monazite, garnet) was 2.47% (average). Detailed borehole sampling and resource mapping of a large, mid-channel sand bar showed that placer-style HM accumulations occur upstream and along the margins of the bar.
AhmedSS, MiahMY, QumruzzamanC, ZamanMN, BadrulAAKM, BiswasPK.2010. Alteration and exsolution characteristics of ilmenites of Moheskhali Island, Chittagong, Bangladesh.Bangladesh J Sci Ind Res. 45(1):17–26.
2.
BestJL, BrayshawAC.1985. Flow separation - a physical process for the concentration of heavy minerals within alluvial channels.J Geol Soc London. 142:747–755. doi: 10.1144/gsjgs.142.5.0747
3.
BlottSJ, PyeK.2012. Particle size classes and classification of sediment types based on particle size distributions: review and recommended procedures.Sedimentology. 59:2071–2096. doi: 10.1111/j.1365-3091.2012.01335.x
4.
BrukerAXS.2013. TOPAS V5: general profile and structure analysis software for powder diffraction data. Version 5. Karlsruhe, Germany: Bruker AXS GmBH.
5.
ChakrabortyT, GhoshP.2010. The geomorphology and sedimentology of the Tista megafan, Darjeeling Himalaya: implications for megafan building processes.Geomorphology. 115:252–266. doi: 10.1016/j.geomorph.2009.06.035
6.
ChowdhuryMNM, UddinS, SalehS.2014. Present scenario of renewable and non-renewable resources in Bangladesh: a compact analysis.Int J Sustain Green Energy. 3(6):164–178.
DillHG.1998. A review of heavy minerals in clastic sediments with case studies from the alluvial-fan through the nearshore-marine environments.Earth-Sci Rev. 45:103–132. doi: 10.1016/S0012-8252(98)00030-0
9.
DillHG.2007. Grain morphology of heavy minerals from marine and continental placer deposits, with special reference to Fe–Ti oxides.Sediment Geol. 198:1–27. doi: 10.1016/j.sedgeo.2006.11.002
10.
GansserA.1964. Geology of the Himalayas. New York (NY): Interscience Publishers; p. 289.
11.
GarzantiE, VezzoliG, AndoS, LanordFG, SinghSK, FosteretG.2004. Sand petrology and focused erosion in collision orogens: the Brahmaputra case.Earth Planet Sc Lett. 220:157–174. doi: 10.1016/S0012-821X(04)00035-4
12.
GhoshK.2015. Sandy macroforms dynamics and one dimensional facies characterization of the River Teesta.Indian J Geo Env Mang. 14:1–15.
13.
HillRJ, HowardCJ.1987. Quantitative phase analysis from neutron powder diffraction data using the Rietveld method.J Appl Cryst. 20:467–474. doi: 10.1107/S0021889887086199
14.
HossainI, AhmedSS, IslamN, BiswasPK, RahmanMA.2013. Glass sand potentiality of bar sediments from Tista and Dharla rivers, Bangladesh.Rajshahi University J Life Earth Agr Sci. 41:57–64. doi: 10.3329/rujleas.v41i0.21625
15.
ICDD.2016. PDF-4 powder diffraction database. Newtown Square (PA): International Centre for Diffraction Data.
16.
IslamMA.1997. Areal variation of monazite, zircon, magnetite and ilmenite in Cox's Bazar, Bangladesh.J Indian Assoc Sedimentologists. 16:243–247.
17.
KabirMZ, DeebaF, RajibM.2006. Optical and mineralogical characteristics of some major beach placer minerals of Bangladesh; Technical report, BSMEC/TR-1/2006, February’06, Beach Sand Minerals Exploitation Center, Bangladesh Atomic Energy Commission, Cox's Bazar, Bangladesh.
18.
KhanSS, IslamTAR.2015. Anthropogenic impact on morphology of Teesta River in Northern Bangladesh: an exploratory study.J Geosci Geomat. 3:50–55.
19.
KunduA, MatinA, MukuIM.2012. Depositional environment and provenance of Middle Siwalik sediments in Tista valley, Darjiling District, Eastern Himalaya, India.J Earth Syst Sci. 121:73–89. doi: 10.1007/s12040-012-0154-1
20.
MangeMA, MaurerHFW.1992. Heavy minerals in colour. London: Chapman and Hall; p. 147.
21.
MitraS, AhmedSS, MoonH-S.1992. Mineralogy and chemistry of the opaques of Cox's Bazar (Bangladesh) beach sands and the oxygen fugacity of their provenance.Sediment Geol. 77:235–247. doi: 10.1016/0037-0738(92)90129-F
22.
MortonAC.1991. Geochemical studies of detrital heavy minerals and their application to provenance research. In: MortonAC, ToddSP, HaughtonPDW, editors. Developments in sedimentary provenance studies. Special Publication 57. London: Geological Society of London, p. 31–46.
23.
MortonAC, HallsworthCR.1999. Processes controlling the composition of heavy mineral assemblages in sandstones.Sediment Geol. 124:3–29. doi: 10.1016/S0037-0738(98)00118-3
24.
MukhopadhyaySC.1982. The Tista Basin: a study of fluvial geomorphology. In: BagchiKP, editor. The Ganges delta. Calcutta: University of Calcutta Press; p. 157.
25.
RahmanMA, BiswasPK, ZamanMN.2014. River sands of Bangladesh. Saarbrucken, Germany: Lap Lambert Academic Publishing, AV Akademikerverlag GmbH & Co, KG; p. 1–73.
26.
RahmanMA, PowncebyMI, HaqueN, BruckardWJ, ZamanMN.2016. Valuable heavy minerals from the Brahmaputra River sands of Northern Bangladesh.Trans IMM Section B. 125:174–188.
27.
RahmanMA, ZamanMN, BiswasPK, SultanaMS.2017. Economic viability of the Tista River sand deposits in Bangladesh, an overview.J Sci Res. 9(2):219–233. doi: 10.3329/jsr.v9i2.30374
28.
RajibM, KabirMZ, DeebaF, ZamanMM, RanaSM.2007. Distribution of five major heavy minerals along the recent beach areas of Bangladesh.Bangladesh J NOAMI. 24(1):P-1–P-9.
29.
RietveldHM.1969. A profile refinement method for nuclear and magnetic structures.J Appl Cryst. 2:65–71. doi: 10.1107/S0021889869006558
30.
VezzoliG, LombardoB, RolfoF.2017. Petrology of the Tista and Rangit river sands (Sikkim, India).Ital J Geosci. 136:103–109. doi: 10.3301/IJG.2016.04
31.
ZamanMN, RahmanMA, BiswasPK.2012. Sands of the Brahmaputra river basin Bangladesh. Saarbrucken, Germany: Lap LAMBERT Academic Publishing, AV Akademikerverlag GmbH & Co. KG, p.12.
