China releases first seabed chemical map

April 17, 2026

China has officially published its first-ever detailed seabed chemical element map covering its eastern maritime regions, marking a major milestone in marine science and resource management. The release, reported by CCTV News, is based on nearly 20 years of geological surveys led by the Ministry of Natural Resources.

Advanced marine data strengthens ocean governance

Experts highlight that this newly released dataset significantly enhances China’s marine data capabilities, enabling more accurate and science-driven maritime governance. The map is expected to play a crucial role in marine spatial planning, environmental protection, and offshore resource exploration.

Largest geochemical dataset of China’s eastern seas

The project integrates field data from over 20,000 seabed sampling locations, combined with advanced machine-learning analysis. This has resulted in the most comprehensive and reliable multi-dimensional geochemical database ever created for China’s eastern waters.

Researchers conducted a full-cycle study of seabed sediments, tracing their transformation from land-based origins to ocean deposition. This process effectively delivers a complete “elemental assessment” of the ocean floor, offering new insights into sediment composition and evolution.

Mapping key elements and marine resources

The seabed map identifies the distribution, concentration, and patterns of dozens of chemical elements, including:

• Iron

• Manganese

• Copper

• Rare earth elements

These findings form a detailed geochemical atlas, serving as a strategic “navigation tool” for sustainable marine development and conservation efforts.

Environmental monitoring and pollution control benefits

According to researchers from the Qingdao Institute of Marine Geology, analyzing chemical element distribution allows for:

• Rapid identification of polluted marine zones

• Detection of ecologically sensitive areas

• Improved marine environmental protection planning

• Stronger pollution risk management

This data also supports the establishment of marine ecological protection boundaries, ensuring more effective conservation policies.

Boosting mineral exploration and scientific research

The seabed mapping initiative enhances the ability to locate underwater mineral resources with greater precision, reducing unnecessary or inefficient exploration efforts. Additionally, the dataset provides valuable information for scientists studying:

• Earth’s geological evolution

• Climate change patterns

• Oceanographic history

Strategic importance for China’s marine economy

Industry analysts emphasize that this achievement demonstrates China’s growing capacity to independently survey and evaluate marine resources. It also strengthens the country’s ability to manage its maritime territory and economic interests.

China’s eastern waters—including the Bohai Sea, Yellow Sea, and East China Sea—are vital economic and ecological zones linking Asia to the Pacific Ocean. The seabed in these regions acts as a natural archive, preserving records of continental shifts, climate variations, and river system changes over millions of years.

Closing gaps in global marine research

This project fills a long-standing gap in systematic seabed geochemical mapping, boosting China’s influence in global marine science—particularly in the study of marginal seas.

Backed by rapid advances in deep-sea technology

The map’s release reflects broader national efforts to strengthen marine infrastructure. China has made significant progress in deep-sea exploration technologies, supported by advanced tools such as:

• Fendouzhe submersible

• Mengxiang vessel

• Seabed observation networks

These innovations position China among global leaders in deep-sea exploration and development.

Future outlook: marine surveys and resource security

China’s 15th Five-Year Plan (2026–2030) prioritizes expanded marine surveys, improved ecological monitoring systems, and enhanced early-warning capabilities. Continued investment in ocean research is expected to:

• Strengthen long-term resource security

• Support sustainable maritime economic growth

• Enable future seabed resource extraction projects

A strategic move for sustainable ocean development

As global demand for marine resources rises, improving ocean survey capabilities has become a national strategic priority. This comprehensive seabed mapping initiative lays the foundation for future advancements in:

• Deep-sea exploration

• Marine environmental protection

• Resource management and utilization

Overall, the release of this seabed chemical element map represents a significant step toward data-driven ocean governance and sustainable maritime development.