Features of 63,65Cu NMR Spectra in the Local Field of Samples of CuFeS2 Semiconductor Mineral from Oceanic Sulfide Deposits

Abstract

The results of studying natural samples of CuFeS₂ chalcopyrite mineral from hydrothermal ore manifestations of island arcs of the Pacific Ocean by ⁶³Cu nuclear magnetic resonance (⁶³Cu NMR) in a local field at room temperature are presented. The asymmetric shape of the detected resonance lines in the ⁶³Cu NMR spectrum indicates the presence of at least two overlapping lines. The presence of two overlapping central components can be a consequence of the occurrence of regions with different types of structural distortion near the resonant nuclei. These results show that the pulsed ⁶³Cu NMR method can be an effective method for studying the physical properties of deep-sea polymetallic sulfides of the global ocean.