China Geological Survey

Seismological Constraints on Subduction and Suture Zone Architecture in the Central African Copperbelt

Summary Central Africa marks a major collisional zone of the Pan-African Orogeny, involving convergence of the Congo and Kalahari plates during Gondwana assembly (~600–500 Ma). This collision formed the Lufilian Belt and one of the world’s most significant metallogenic provinces—...

Mineralogical Characterization and Purification of High-Purity Quartz from the Pegmatite Core Zone

Pegmatitic quartz is an important source of high-purity quartz, and its purity and inclusion characteristics together constitute the key criteria for evaluating the efficient utilization of this quartz. This study takes the quartz resource from the core zone of a pegmatite deposi...

Haima Cold Seeps: Direct Evidence for the Occurrence of Gas Hydrates—A Case Study from the Qiongdongnan Sea Area, South China Sea

Cold seeps are natural “outcrop” evidence of marine gas hydrates and represent one of the most direct indicators of gas hydrate occurrence. This study used high-resolution 3D seismic data covering approximately 400 km2 in the deep-water southern Qiongdongnan Basin, northern South...

Maturation of an early Paleozoic continental arc in the Central Asian Orogenic Belt: Petrogenesis of Silurian granitoids in northern West Junggar, NW China

Transformation of basaltic intra-oceanic arcs to mature continental arcs is responsible for considerable Phanerozoic juvenile crustal growth in the Central Asian Orogenic Belt (CAOB), which is the largest accretionary orogenic belt in the world. Controversy has long surrounded th...

Species-Specific Molybdenum Enrichment in Peanuts (Arachis hypogaea) from Natural Molybdenum-Rich Agricultural Soils: Uptake Drivers and Dietary Risk Implications

Molybdenum (Mo) is an essential plant micronutrient, and legumes may accumulate relatively high Mo because of their greater physiological demand. Field evidence for species-specific Mo transfer in naturally Mo-enriched soils remains limited. Rhizosphere soil and edible seeds/grai...

Coal-Body Structural Evolution, Multiscale Pore-System Reorganization, and Methane Storage-Transport Characteristics Across a Tectonic Deformation Gradient

Tectonic deformation can reorganize adsorption-related pores, matrix pore space, and pore-throat-fracture networks, but how these functional domains jointly govern fluid mobility and permeability stability under stress remains unclear where deformation intensity and coal rank cov...

Lower soil organic carbon mineralization and temperature sensitivity along a freeze-thaw erosion gradient in permafrost soils

Freeze-thaw erosion (FTE) is widespread in permafrost regions, yet its effects on soil organic carbon (SOC) dynamics remain unclear. Here, we investigated SOC fractions, physicochemical properties, microbial biomass and community composition, SOC-degradation functional genes, SOC...

Improved estimation of lake storage variation via DEM reconstruction integrating elevation and morphological constraints

High-quality Digital Elevation Models (DEMs) are essential for accurately estimating lake storage variations, but the high cost of in-situ measurements limits their large-scale application. Reconstructing DEMs from remote sensing-derived lake contours is a promising low-cost alte...

Groundwater connectivity driven watershed boundary evolution leads to lake shrinkage in the Inner Mongolia Plateau

While extensive research has explored the responses of lakes to climate change and human activities, the process of watershed evolution driven by altered hydrological connectivity, and the mechanisms by which it drives lake shrinkage, remain poorly understood. We reconstructed gr...

The WoKaS-Iso database: workflow for a global compilation of oxygen-18 and deuterium records in karst springs and cave drip water for enhanced understanding of karst systems

For analysing karst hydrogeological systems, observations of karst springs and cave drips are considered indispensable. In addition to hydrometric observations, knowing the oxygen and hydrogen stable isotope ratios has improved the understanding of vadose zone and aquifer dynamic...

Metasomatized mantle source and far-field effect of flat-slab subduction at the Huangtuliang gold deposit, northern margin of the North China Craton

The metasomatized lithospheric mantle has been proposed as the primary source for gold mineralization at cratonic margins, yet without much direct evidence. To substantiate this theory with geochemistry, we study ore-hosting alkaline syenite and mineralization-related lamprophyre...

Effect of structure aspect ratio on the heat storage and extraction performance in an abandoned mine shaft

Combining solar energy with water tank thermal storage is a highly promising method for achieving cross seasonal storage and utilization of low-grade energy. However, the existing research mainly focuses on ground water storage, few investigations are involved in using abandoned...

Development and Organic‐Matter Enrichment Mechanisms of Organic‐Rich Shales in the Upper Permian Dalong Formation, Western Hubei Trough, South China

ABSTRACT Organic‐rich shales of the Upper Permian Dalong Formation in the Western Hubei Trough represent a potential successor interval for shale‐gas exploration in the Middle–Upper Yangtze region, yet their depositional evolution and organic‐matter enrichment mechanisms remain i...

The Italian geothermal play-typing, a blueprint for unlocking national geothermal development

Abstract Italy has a long history of geothermal use, but a comprehensive, updated national assessment has been lacking. This study is the first to systematically evaluate geothermal systems across Italy using the modern geothermal play concept. The primary objective is to provide...

Accretionary pedogenesis and Holocene climate evolution in black soil region of northeast China: Evidence from a sedimentary profile

The black soil region of the Songnen Plain, one of the world’s three major black soil belts, is critical for China’s grain security, yet the formation mechanism of its thick, organic-rich soils remains insufficiently quantified. Here, we investigate the ZYHPM01 profile in the eas...

Combined regulation of oxidized pyrite flotation by sodium sulfide and malic acid: Experimental investigation and DFT calculations

Surface oxidation of pyrite (FeS 2 ) during flotation produces hydrophilic Fe(III)-bearing species, substantially decreasing its floatability. In this study, a combined sodium sulfide (Na 2 S)-malic acid regulation system was developed to improve the flotation response of oxidize...

The effect of hybrid models integration sequence: taking Fushun area as an example

Landslide susceptibility zoning (LSZ) is a crucial step in reducing landslide related losses, and its accuracy remains a long-standing research focus. Hybrid models are widely used, but little is known about coupling sequences. Here, we show that the accuracy of hybrid models can...

Quantitative Decoupling of Dominant Hydrochemical Processes in Coastal Geothermal Systems: Insights into Fluoride Enrichment via Stable Isotopic Tracers and PMF Model

Geothermal energy is a critical low-carbon resource in the global carbon neutrality transition, but expanding exploitation has raised growing concerns over geothermal fluid quality degradation and fluoride-related public health risks in the tectonically active coastal region of G...

Study on the Differentiation of Microbial Communities Under Different Soil Types in the Typical Black Soil Area of Songnen Plain

Soil type imposes multilayered environmental filtering via physical structure, chemical properties, and resource availability, shaping microbial community assembly. Using 70 samples (black soil n = 27, meadow soil n = 32, and brown soil n = 11) from a typical black soil region of...

Integrated field test and modeling study of CO2 geological storage with enhanced water recovery in Eastern Junggar Basin of Xinjiang

Xinjiang, a primary energy export hub in China, faces substantial carbon emission pressure and severe water scarcity, making CO 2 geological storage combined with enhanced water recovery (CO 2 -EWR) a win–win strategy to foster regional development and bolster national energy sec...