印度西海岸康巴特湾近海沉积物中含钒钛磁铁矿的赋存状态

IF 0.8 4区 综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2022-10-18 DOI:10.1007/s40010-022-00799-4
B. Gopakumar, L. G. Sarath, L. K. Soni, Sandeep Kumar, Sathish Gunasekharan, P. V. Anju, D. Aimdas, Sharika Mathew
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引用次数: 0

摘要

对古吉拉特邦Alang附近的Khambhat湾沉积物样本进行的重矿物研究表明,以钛磁铁矿、磁铁矿和钛铁矿为代表的不透明矿物占主导地位,而非不透明矿物,如辉石和角闪石,以及微量的硅线石、锆石、石榴石和独居石。大块沉积物重矿物含量最高达28.5%,平均为12.5%。在重矿物中,50%以上为不透明矿物,以钛磁铁矿、磁铁矿和钛铁矿为代表。对精挑细选的不透明颗粒的SEM-EDX研究表明,钒的浓度较高,高达1.1%。磁重矿物组分的原子吸收光谱分析证实了EDX研究的结果,钒的浓度高达0.36%。随后,对随机选取样品的重矿物进行XRD分析,发现存在含钒钛磁铁矿以及钒矿相黑钒酸盐。对钛磁铁矿颗粒进行了EPMA研究,结果表明V2O3含量为0.36 ~ 1.7%,平均为1.3%。根据分析研究推断,康哈特湾的钒钛磁铁矿可能主要是通过纳尔马达河和塔提河从德干玄武岩中排出的。
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The Occurrence of Vanadiferous Titanomagnetite in Offshore Sediments, Gulf of Khambhat, West Coast of India

Heavy mineral study of sediment samples collected from Gulf of Khambhat, off Alang, Gujarat, shows a predominance of opaque minerals represented by titanomagnetite, magnetite and ilmenite over non-opaque minerals like pyroxene and amphiboles and traces of sillimanite, zircon, garnet and monazite. The bulk sediments contain up to 28.5% of heavy minerals with an average of 12.5%. Within the heavy minerals, more than 50% are opaque in nature represented by titanomagnetite, magnetite and ilmenite. SEM–EDX studies on handpicked opaque grains indicated a higher concentration of vanadium up to 1.1%. The result of EDX studies was confirmed by AAS analysis of magnetic heavy mineral fraction that showed a concentration of vanadium up to 0.36%. Subsequently, XRD analysis of the heavy minerals of randomly selected samples revealed the presence of vanadium-bearing titanomagnetite as well as the vanadium mineral phase, melanovanadate. EPMA studies carried out in titanomagnetite grains that revealed V2O3 content of 0.36–1.7% with an average of 1.3%. Based on the analytical studies, it is inferred that the vanadiferous titanomagnetites in the Gulf of Khambhat are possibly drained from Deccan basalt mainly through the Rivers of Narmada and Tapti.

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CiteScore
2.60
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0.00%
发文量
37
审稿时长
>12 weeks
期刊介绍: To promote research in all the branches of Science & Technology; and disseminate the knowledge and advancements in Science & Technology
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