Figure 2
The image shows a Vosviewer bibliometric map titled “Vosviewer Bibliometrics of Marine Sand Mining”. Several blurred circular nodes appear across the image. The nodes vary in size. The largest cluster is near the center and contains the labels “sea sand” and “sea sand mining”. To the left of this cluster, medium-sized nodes appear with the labels “sand mine”, “subdistrict”, and “activity”. Farther left, a small node is labeled “coal”. To the right of the central cluster, several small nodes are present.Vosviewer bibliometrics of marine sand mining. Source: Processed data by the authors, 2025