The Jamuna is one of the world’s most heavily sediment-laden braided river. Despite a major host for heavy mineral resources, the sediments of the Jamuna river are sparsely studied. A mineralogical and SEM-EDS investigation has been carried out in the middle part (along Sirajganj and Jamalpur district of Bangladesh) of the Jamuna river to appraise the grain size parameter, texture, depositional environment, heavy mineral distribution, and elemental composition of the heavy minerals. The results show that sediment samples are very fine to fine sand, moderate to well sorted, near symmetrical to strongly fine skewed, and mesokurtic to very leptokurtic. Uniform to graded suspension mechanisms are the processes for sediment deposition. Heavy minerals accumulation ranges from 0.5% to 9.33%, and the assemblages are predominantly marked by epidote, amphibole, followed by opaque (magnetite and ilmenite), garnet, zircon, sillimanite, apatite, tourmaline, rutile, kyanite, staurolite, monazite, chlorite, and titanite. The percentage of amphibole, garnet, and zircon decreases downstream and epidote increases in the same direction. The calculated zircon-tourmaline-rutile index (ZTR) varied between 3 to 13%, average apatite-tourmaline index (ATi), garnet-zircon index (GZi), rutile-zircon index (RuZi) and staurolite-zircon index (SZi) values are 54.55%, 75%, 38.68%, and 30% respectively. The Brahmaputra-Jamuna river sediments are derived from mixed-source regions (e.g., Shillong Plateau, Indo-Burman Ranges, and the Himalayas). The abundance of sub-angular to angular, high relief heavy mineral grains with sharp edges on the surface, conchoidal fractures, deep troughs, and breakage blocks infer that the provenance is close to the depositional area. The presence of rounded to sub-rounded, smoother surface with adhering particles, arcuate steps, and low to medium relief indicate the long-distance transportation of heavy mineral grains through fluvial environment.

贾木纳河（Jamuna）是世界上泥沙含量最高的辫状河之一。尽管拥有大量的重矿物资源，贾穆纳河的沉积物却很少被研究。在Jamuna河中部（孟加拉国Sirajganj和Jamalpur区）进行了矿物学和SEM-EDS调查，以评估重金属的粒度参数，质地，沉积环境，重矿物分布和重金属元素组成矿物质。结果表明，沉积物样品非常细至细砂，中等至良好分类，接近对称至强烈细偏斜，中速至极短速。均匀到分级的悬浮机制是沉积物沉积的过程。重矿物的积累范围为0.5％至9.33％，并且这些组合物主要由附子标记，角闪石，然后是不透明的（磁铁矿和钛铁矿），石榴石，锆石，硅线石，磷灰石，电气石，金红石，蓝晶石，星形石，独居石，绿泥石和钛铁矿。闪石，石榴石和锆石的百分比在下游降低，而附子在相同方向上增加。计算得出的锆石-电气石-金红石指数（ZTR）在3％至13％之间，平均磷灰石-电气石指数（ATi），石榴石-锆石指数（GZi），金红石-锆石指数（RuZi）和星形石-锆石指数（SZi）值分别为54.55％，75％，38.68％和30％。雅鲁藏布江-雅穆纳河的沉积物来自混合源区（例如西隆高原，印度-布尔曼山脉和喜马拉雅山）。大量的亚角到角高浮雕重矿物颗粒，表面有锋利的边缘，贝壳状裂缝，深谷，和破损块推断出物源接近沉积区域。圆形至亚圆形，较光滑的表面（带有粘附的颗粒），弓形台阶和中低浮雕的存在表明重矿物颗粒在河床环境中的长距离运输。