Heavy Minerals in Sands along Brahmaputra (Jamuna) River of Bangladesh  

作　　者：Md. Ibrahim Khalil Md. Nazrul Islam Khan Md. Zafrul Kabir Ratan Kumar Majumder Md. Idris Ali Debasish Paul Syed Mohammad Azharul Islam Md. Ibrahim Khalil;Md. Nazrul Islam Khan;Md. Zafrul Kabir;Ratan Kumar Majumder;Md. Idris Ali;Debasish Paul;Syed Mohammad Azharul Islam(Nuclear Minerals Unit, Atomic Energy Research Establishment, Dhaka, Bangladesh;Material Science Division, Atomic Energy Center, Bangladesh Atomic Energy Commission, Dhaka, Bangladesh;Health Physics and Radioactive Waste Management Unit, Atomic Energy Research Establishment, Dhaka, Bangladesh;Department of Physics, Jahangirnagar University, Dhaka, Bangladesh)

机构地区：[1]Nuclear Minerals Unit, Atomic Energy Research Establishment, Dhaka, Bangladesh [2]Material Science Division, Atomic Energy Center, Bangladesh Atomic Energy Commission, Dhaka, Bangladesh [3]Health Physics and Radioactive Waste Management Unit, Atomic Energy Research Establishment, Dhaka, Bangladesh [4]Department of Physics, Jahangirnagar University, Dhaka, Bangladesh

出　　处：《International Journal of Geosciences》2016年第1期47-52,共6页地球科学国际期刊（英文）

摘　　要：Sands along Brahmaputra River of Bangladesh have long been considered to be a source of heavy minerals (HMs) since it traversed a long way through various terrains. An attempt has been made under this research work to determine the kinds and amounts of heavy minerals in the sands sourced from the river system. Samples from 14 locations along Brahmaputra River covering 30 km distance from upstream to downstream of the river are found to contain different heavy minerals concentration with a range of 7.92 - 25.16 weight% with the remaining of the sample comprising silicate and aluminosilicates. Mineral characterization from peak positions in diffractogram of X-ray Diffraction (XRD) evaluate quartz, feldspar and mica are major categories light mineral while rutile, magnetite, illmenite, zircon, monazite, garnet, uranium arsenide and uranium fluoride are the major types heavy minerals. Ilmenite and rutile are main contributors of total heavy mineral (THM). Titanium bearing minerals ilmenite and rutile contributes 26.22% - 31.01% and 14.57% - 23.50% of THM. In the present study area, most of the sands are found to be fine and medium grained as obtained from the particle sizes analysis using 18- to 230-mesh.Sands along Brahmaputra River of Bangladesh have long been considered to be a source of heavy minerals (HMs) since it traversed a long way through various terrains. An attempt has been made under this research work to determine the kinds and amounts of heavy minerals in the sands sourced from the river system. Samples from 14 locations along Brahmaputra River covering 30 km distance from upstream to downstream of the river are found to contain different heavy minerals concentration with a range of 7.92 - 25.16 weight% with the remaining of the sample comprising silicate and aluminosilicates. Mineral characterization from peak positions in diffractogram of X-ray Diffraction (XRD) evaluate quartz, feldspar and mica are major categories light mineral while rutile, magnetite, illmenite, zircon, monazite, garnet, uranium arsenide and uranium fluoride are the major types heavy minerals. Ilmenite and rutile are main contributors of total heavy mineral (THM). Titanium bearing minerals ilmenite and rutile contributes 26.22% - 31.01% and 14.57% - 23.50% of THM. In the present study area, most of the sands are found to be fine and medium grained as obtained from the particle sizes analysis using 18- to 230-mesh.

关 键 词：Heavy Minerals RIVER SAND BANGLADESH 

分 类 号：P57[天文地球—矿物学]