China’s research vessel Haiyang Dizhi-6 has wrapped up its 16th deep-sea survey mission, delivering a series of important results in seafloor geological investigations and advanced exploration technology, state broadcaster CCTV reported on Monday. The expedition obtained valuable polymetallic nodules, basalt rocks, and near-bottom seawater samples, and successfully trialed a groundbreaking electromagnetic data acquisition system at abyssal depths. This deep-sea survey marks a significant leap in China’s ability to explore and understand the ocean’s most remote regions.
During the mission, scientists deployed a range of geological survey methods. They collected first-hand data and samples that will support studies of deep-earth evolution. Qin Pengbo, deputy director at the Guangzhou Marine Geological Survey, told CCTV that the team discovered high-abundance polymetallic nodules. Moreover, they retrieved approximately 90 kilograms of basalt samples. These samples, he added, provide crucial evidence for analyzing the mantle source region and Earth’s deep processes. Consequently, the deep-sea survey has yielded rare material for geochemical and tectonic research.
In addition to sampling, the research team tested China’s independently developed full-ocean-depth electromagnetic data acquisition station. This 10,000-meter-class system is the world’s first of its kind. Engineer Wu Zebin from GMGS reported that the team obtained high-quality data at a depth of 7,737 meters in an abyssal rift zone in the western Pacific. All performance indicators met the required standards, he confirmed. The successful sea trial represents a major breakthrough in deep-sea electromagnetic survey technology. Therefore, this deep-sea survey has not only gathered samples but also validated crucial equipment.
The new electromagnetic station will support scientific research on hadal-zone Earth systems. It will also assist site selection for international ocean drilling programs. The achievement underscores China’s growing technical self-reliance in marine exploration. Furthermore, it strengthens the country’s position in global deep-sea scientific collaborations.
Looking ahead, the GMGS plans to use the data and samples from this deep-sea survey to advance understanding of mineral resources and geodynamic processes. The combination of sampling successes and equipment validation sets the stage for future missions. The Haiyang Dizhi-6 will likely continue its role as a platform for innovation in ultra-deep water research. For now, this expedition demonstrates that China’s capabilities in both scientific discovery and engineering are reaching new depths.
