Analysis of the abundance of ejecta boulders Z2 m in diameter on the rims of twelve lunar craters (150– 950 m in diameter) of known formation ages (2–300 Ma) led to estimates of the survival times of metersized boulders against collisional destruction on the Moon. The median survival time, when 50% of the original rock population 42 m was destroyed, is about 40–80 Ma, while the 99% survival tim...

The development of hydrogeology with respect to hard-rock and fractured-rock aquifers is described. differences between porous karst are explained, as well the groundwater flow regimes in different fractured rocks. A position taken on numerical modeling, from beginning modeling present day, focus particular challenges. Because importance aquifers, tools for exploration future resource managemen...

A strength profile across the NE Japan interplate megathrust was constructed in the source region of the 2011 Tohoku-oki earthquake (Mw9.0) using friction, fracturing, and ductile flow data of the oceanic crustal materials obtained from laboratory experiments. The depth-dependent changes in pressure, temperature, and pore fluid pressure were incorporated into a model. The large tsunamigenic sli...

Earthquakes are dissipation of energy throughout elastic waves. Canonically is the elastic energy accumulated during the interseismic period. However, in crustal extensional settings, gravity is the main energy source for hangingwall fault collapsing. Gravitational potential is about 100 times larger than the observed magnitude, far more than enough to explain the earthquake. Therefore, normal ...

[1] Data collected from the 2003 Mw6.5 San Simeon earthquake sequence in central California and a 1986 seismic refraction experiment demonstrate that the weak Franciscan subduction complex suffered brittle failure in a region without significant velocity contrast across a slip plane. Relocated hypocenters suggest a spatial relationship between the seismicity and the Oceanic fault, although blin...

Access to a granitic rock mass in an iron ore mine in Sweden provided a unique opportunity for underground experiments related to the geologic disposal of radioactive waste. These field tests demonstrated the importance of hydrogeology and the difficulties in predicting the thermomechanical behavior of fractured granitic rocks. To characterize a site fully, measurements made from the surface mu...

this paper presents the new geochemical isotopes sr and nd, and the mineralization data for the south neyshabour volcanic rocks located in ne iran. based on the chemical classifications, the studied rocks are basaltic trachy andesite, trachy andesite, trachyte, and trachy dacite in composition. all the analyzed volcanic rocks display enrichment in light rare earth elements (lree) relative to th...

Abstract Rock bursts are one of the most common dynamic disasters in coal mines and seriously affect safety production. At present, there three types rock bursts: fault‐structure, fold‐structure, thick/hard‐roof bursts. First, paper proposed an innovative technology for mine ground fracturing to control those Then, new method, its devices, process, monitoring technique cracks were introduced. N...

this paper presents evidence on mesozoic inversion of basin bounding faults within the taleqan-gajereh-lar paleograben (tglp) in central alborz range. for this purpose, well documented stratigraphy data across the tglp together with the new acquired structural data on the geometry and kinematics of the paleograben basin bounding faults are utilized. the tglp has evolved through the early and mi...