Institute of Geochemistry

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...

Assessing synergies and trade-offs among water yield, sediment retention, and carbon storage in Yunnan Province, China

Understanding the spatiotemporal dynamics and interactions of ecosystem services (ES) is critical for regional ecological governance. Taking Yunnan Province, a key ecological barrier in southwestern China, this study quantified water yield (WY), sediment retention (SR), and carbo...

Hydrogen‐Dominated Iron Phase Stability and the Structure of the Earth's Inner Core

Abstract The crystal structure of Earth's inner core (IC) remains debated, with the free energy difference between hexagonal close‐packed (hcp) and body‐centered cubic (bcc) iron under IC conditions being very small. We use ab initio and machine learning force field molecular dyn...

Graphitization of nitrogen-bearing organic-like carbonaceous material in a dust particle from Chang’e-6 lunar samples

Abstract The delivery and evolution of carbonaceous materials to airless planetary bodies remain poorly constrained. This study characterized a porous, aggregated, carbon-rich dust particle (CE6-CDP) from Chang’e-6 lunar samples. CE6-CDP yielded a mean δ13CVPDB value of − 25.92 ±...

Spatiotemporal Deep Learning for Continuous Illumination Mapping and Sun-Synchronous Path Planning in Lunar Polar Exploration Under Chang’E-7 Mission Constraints

The lunar south polar region’s extreme illumination conditions impose strict energy constraints for solar-powered rover operations. Traditional Sun-synchronous path planning relies on dynamic time-dependent illumination evaluation, leading to high computational costs. We present...

High-Precision Inversion of Forest Aboveground Biomass in Karst Regions Based on Multi-Scale Synergy and Geomorphological Zoning Modeling

Accurate quantification of forest biomass in the karst mountainous region of Southwest China is critical for regional carbon sink accounting. However, remote sensing-based inversion of forest biomass in this region is subject to the dual constraints of scale effects and spatial h...

Stellar Interpretation of Meteoritic Data and PLotting for Everyone (SIMPLE): Isotope Mixing Lines for Six Sets of Core-collapse Supernova Models

Abstract Bulk meteorites and their inclusions exhibit, for many chemical elements, isotopic variability produced by nucleosynthetic events in stars and supernovae before the formation of the Sun. While the exact astrophysical origins of these variations are still a matter of deba...

Nanoscale Formation,Structure, and Stability of Phosphate-IronColloids at Anoxic-Oxic Interfaces

Abstract The mobility of phosphorus (P) at anoxic–oxic interfaces is largely controlled by the formation of phosphate-iron (Fe) colloids, yet the nanoscale mechanisms underlying their formation, structure, and stability remain poorly described. Here, we systematically investigate...

High-temperature behavior of FeTiO3 and MgTiO3: in-situ synchrotron X-ray diffraction study

The high-temperature volumetric and axial thermal expansion behaviors of ilmenite (FeTiO 3 ) and geikielite (MgTiO 3 ) were examined up to 773 K using in situ synchrotron X-ray diffraction. No phase transitions were observed within the experimental temperature range. The temperat...

Genetic links between IIIE iron meteorites and the core of the HED parent asteroid

Rocky planets formed through the differentiation of planetesimals into metal‑rich cores and silicate mantles, yet direct evidence linking these complementary reservoirs remains scarce. Here we show that IIIE irons and howardite-eucrite-diogenite (HED) meteorites are genetically l...