High-temperature and high-pressure (high-grade) metamorphic complexes of variable ages are common in the Central Asian orogenic belt (CAOB), and their precise geochronology and origin are essential to unravel the orogenic architecture and crust-production rate of the CAOB. Hereby it is essential to ...

Paleomagnetic results cannot be applied in global and regional tectonic reconstructions unless the paleosecular variation has been adequately averaged. However, how many sampling sites and samples are enough to calculate a reliable paleopole remains debated. Based on the relation among the sampling ...

The Permian basalts in the Central Asian Orogenic Belt (CAOB) are crucial for constraining the closure of the Paleo-Asian Ocean. However, the origin of these basalts is still under discussion. Here, we present comprehensive bulk-rock geochemical, Sr-Nd-Pb-Hf isotopic, and zircon U-Pb-Lu-Hf isotopic ...

Lithium is one of the important strategic energy metals, which is in short supply in China. There are three major types of lithium deposits: brine and salt lake type, highly differentiated granite or pegmatite type, and carbonate-clay type. In recent years, some new types of lithium deposits have al...

The world's increasing demand for rare earth elements (REEs) highlights the potential for using new multispectral remote sensing techniques to define new exploration targets in arid regions, such as the Kingdom of Saudi Arabia (KSA), Egypt, and regions of central and western China. Although REEs can...

Water in the deep Earth's interior has important and profound impacts on the geodynamical properties at high-temperature (T) and high-pressure (P) conditions. A series of dense hydrous Mg-silicate (DHMS) phases are generated from dehydration of serpentines in subduction slabs below the lithosphere, ...

Radiogenic isotope dating of illitic clays has been widely used to reconstruct thermal and fluid flow events in siliciclastic sedimentary basins, the information of which is critical to investigate mechanisms of hydrocarbon maturation. This study carried out Rb-Sr and ⁴⁰Ar-³⁹Ar dating of authigenic ...

The Oulad Dlim Massif, adjacent to the Reguibat Shield in South Morocco was considered up to now as part of the Variscan belt (Mauritanides) with a polyphase geologic history and a complex geodynamic evolution implicating oceans closures and accretion of exotic terranes (Avalonian and Meguman) durin...

The structure of loess is loose, and the shear strength of loess drops sharply after contact with water. Therefore, loess mudflows have become a common geological disaster on the Chinese Loess Plateau. In order to study the initiation mode and mechanism of loess mudflows, in this study, seven sets o...

Drainage pipe system is the requisite component of the traffic tunnels in Karst area. To reveal the dynamic process of crystallization blockage in drainage pipes, a novel hydrodynamics and hydrochemistry coupled simulation model was developed for calculating the deposition rate of CaCO₃ fouling in p...

Although slice methods are simple and effective slope stability analysis approaches, they are statically indeterminate. Several modifications of the slice method, such as the Spencer, Morgenstern-Price, and Chen-Morgenstern methods, are statically determinate and solvable as they assume the inter-sl...

To study the mechanism and evolution process of water inrush geohazards under the complex geological environment of the karst cave-fractured zone, a large-scale physical three-dimensional (3D) model test was first performed. Then the conceptual model for the evolution process of water inrush geohaza...

Evaluating the seismic site effect by the ambient noise based horizontal-to-vertical spectral ratio (HVSR) method is strongly affected by the spatial and temporal variations of the ambient noise sources. Therefore, it is necessary to locate the source regions of ambient noise and investigate the rel...

The Kangding City in eastern Tibet is at high risk due to frequent strong earthquakes along the Xianshuihe sinistral strike-slip fault bounding the Chuandian Block to the northeast. The knowledge of paleo-seismicity recurrence along this fault system is key to the evaluation of earthquake hazards in...

Based on the analysis of the deformation styles in different tectonic belts of the Middle-Upper Yangtze region, as well as the dissection of typical hydrocarbon reservoirs, this study determined the controlling effects of deformations on the hydrocarbon accumulations, obtaining the following results...

"Sweet sections" in giant shale oil provinces are preferential fields that primarily support China to increase the reserves and production of continental shale oil. Based on the study of the geological conditions of shale oil in the continental basins in China, it was found that the shale stratum in...

Exploration practice indicates that free gas is the key to the large-scale development of shale gas, while adsorbed gas is also of great significance to the sustainable development of shale gas, and thus systematic researches on absorbed pores are needed. To date, researches on pore structure and mu...

A new, fundamental catchment attribute called the hydrologic time scale τ governs the rate of delivery of runoff to a particular site, and is equal to $\int {Q} dt/ \int|{d} {Q}|$, where Q is discharge and t is time. The value of τ for any gauged site is readily calculated from tabulated discharge ...

Identifying interactions among river water, groundwater and salt lake brine is important for sustainable exploitation of brine mineral resources. In this study, we investigated the water exchange rate in dry and wet seasons, and assessed the influence of seasonal water exchange on brine concentratio...

The nitrogen isotope compositions (δ¹⁵N) of sedimentary rocks can provide information about the nutrient N cycling and redox conditions that may have played important roles in biological evolution in Earth's history. Although considerable δ¹⁵N data for the Precambrian have been published, there is a...