Ministry of Natural Resources

Equatorial Indian Ocean productivity over the last 200,000 years and links to deep circulation variations

Ocean circulation plays a key role in regulating atmospheric carbon dioxide levels during Pleistocene glacial-interglacial cycles. However, spatial responses of the oceans remain poorly constrained because reliable records from important carbon exchange regions, such as the equat...

HiFi-Det: Collaborative Multi-Scale Frequency-Domain Feature Optimization for Crown-of-Thorns Starfish Detection in Complex Underwater Environments

Outbreaks of the Crown-of-Thorns Starfish (COTS, Acanthaster spp.) are a leading biological driver of coral cover loss, making timely and accurate population monitoring essential for reef management. Conventional diver-based surveys are labor-intensive and prone to missed detecti...

Effects of surface processes on nature of arc magmas in subduction zones revealed by Mo-Zn isotopes

The features of arc magmas are inherited from the modified lithospheric mantle sources. Within oceanic subduction zones, the subducted sediment-derived fluids play a critical role in governing the geochemical variations of arc magmas. Nevertheless, it remains unclear whether the...

EcoRestore-KG: A Multi-Agent Framework for Knowledge Graph Construction in Territorial Ecological Restoration

Territorial ecological restoration involves a continuous chain of tasks, including degradation diagnosis, target identification, zoning-based governance, process monitoring, effectiveness assessment and adaptive management. The relevant knowledge is widely distributed across poli...

Experimental investigation of the direct shear strength parameters of compacted snow

Abstract. Compacted snow is utilized as a building material in various construction and engineering applications across global high-latitude regions. For the safety assessment of snow and ice structures in cold regions, cohesion and internal friction angle are key shear strength...

Mechanism Study on Deep Removal of Lattice Impurities from High-Purity Quartz by Chlorination Roasting

High-temperature chlorination roasting is a critical technique for achieving ultra-high-purity quartz required in semiconductor, photovoltaic, and fiber-optic applications. However, the removal mechanisms of lattice-bound impurities remain poorly understood due to a lack of integ...

Optimization of the Planting Structure of Major Grain Crops on Cultivated Land in China for Coordinated Food Production, Ecosystem Service Value, and Irrigation Water Consumption

Balancing food production, ecosystem service value, and agricultural irrigation water consumption is a major challenge for sustainable agricultural development in China. However, quantitative evidence at the national scale remains limited on whether crop planting structure optimi...

Wintertime organic carbon export provides a potential food source for zooplankton in the High Arctic

Abstract Pulsed particulate organic carbon export plays a vital role in sustaining Arctic marine ecosystems and the biological pump. Wintertime particulate organic carbon export in ice-covered Arctic waters is generally considered negligible due to light-limited local primary pro...

First mitogenome-based phylogenetic analysis and divergence time estimation of deep-sea elasipodid sea cucumbers (Holothuroidea: Elasipodida)

Elasipodida is a major deep-sea holothuroid order, and distributed across depths ranging from 350 m to 7,000 m. Its high species diversity and extensive bathymetric range make it a key model system for investigating the evolutionary processes and adaptive radiation of deep-sea fa...

Effects of groundwater level decline on shallow soil water in grassland open-pit mining areas: Water vapor migration and water sources estimation

Study region The Chenqi Coalfield in the Hulunbuir grassland, a typical semi-arid grassland open-pit mining area in Inner Mongolia, China, where mining has caused severe groundwater level decline. Study focus This study adopted in situ monitoring and hydrogen-oxygen stable isotop...

Path-Dependent Diagenesis and Facies-Controlled Reservoir Quality in Lower Cretaceous Fan-Delta Sandstones, North Yellow Sea Basin: A Model for Superimposed Rift Basins

The Lower Cretaceous fan-delta sandstones in the North Yellow Sea Basin underwent a distinctive polyphase burial trajectory, offering a natural laboratory to investigate path-dependent diagenesis and its impact on reservoir quality evolution in superimposed rift basins. Integrati...