The objective of this research is to evaluate the stability natural slopes at inlet and outlet portals Bolangu Ulu diversion tunnel, Gorontalo. were considered stable, therefore slope analyses not carried out previously in tunnel portal design. using Circular Failure Chart (CFC) Limit Equilibrium Methods (LEM). Input data for obtained from field mapping laboratory testing soil rock samples. res...

The Wadi Hodein area contains a wide variety of late Precambrian igneous and metamorphic rocks, represented by gneisses, serpentinites, metagabbros, metasediments, metavolcanics, metagabbro-diorite, granodiorite and granitoids. The Wadi Hodein metavolcanics (WHV), including G. Khashab and G. El Anbat, represent one of the significant metavolcanic suites in the southern part of the Nubian Shield...

The existence of ancient rocks in present mid-ocean ridges have long been observed but received less attention. Here we report the discovery of zircons with both reasonably young ages of about 5 Ma and abnormally old ages of approximate 180 Ma from two evolved gabbroic rocks that were dredged from the Southwest Indian Ridge (SWIR) in the Gallieni fracture zone. U-Pb and Lu-Hf isotope analyses o...

The search for existing or past life in the Universe is one of the most important objectives of NASA’s mission. In support of this objective, ultrasonic based mechanisms are currently being developed at JPL to allow probing and sampling of rocks and to use the mechanisms as a sensor platform for in-situ astrobiological analysis. The technology is based on the novel Ultrasonic/Sonic Driller/Core...

This paper addresses in-situ stress-estimation methods based on the Kaiser effect. The physical and mechanical properties of granite, diorite, granodiorite samples selected at different depth intervals core obtained from a wellbore were examined. ultimate uniaxial compressive strength, modulus elasticity, Poisson’s ratio rock determined using presses strain gauges. Also, local longitudinal shea...