to doing this research daily interpolated temperature data from asfezari data base have been used. in order to recognition extreme cold days, the normalized temperature deviation index (ntdi) applied. then the index sorted according to extensive and severity and first 500 days selected for analysis. the geopotential height data extracted from www.esrl.noaa.gov data base. the thickness anomaly c...

Lithium isotopes have many advantageous characteristics as geochemical tracers for a wide range of geological processes, covering fluid/melt-mineral interactions from the Earth’s surface to the mantle. The latest developments in Li isotope geochemistry, in terms of measuring techniques, major geochemical reservoirs, the contrasting behaviors during near-surface weathering, and crust/ mantle cyc...

Tam Ky - Phuoc Son area has great potential for gold mineral with 98 occurrences, but the evaluation of entire gold-mineralization is still very limited, while this considered as a basis planning, exploration, and mining. The paper uses an Artificial Intelligence model which name Random Forest to build predictive modeling perspectivity map prospect study area. 12 influencing factors are selecte...

The contribution of mantle upwellings varying spatial extent to Cenozoic magmatism across Africa is debated because geochemical and seismological tools used interrogate them are primarily sensitive either composition or temperature. Thermochemical conditions control the depth at which materials undergo phase changes, cause seismic discontinuities. Mapping discontinuities transition zone (MTZ) b...

Abstract Study of secondary dolomitization and documentation the evolution basinal fluids host rock, especially that fine-grained deepwater carbonate mudstone are interest toward reservoir characterization. From this perspective, field characteristics in relation to mineralogy, petrography geochemistry Paleaozoic carbonates Kinta Valley, Peninsular Malaysia, were investigated documented. A tota...

lag is a general term applied to coarse grained (> 2 mm), hard, but partially weathered rockfragments, which are concentrated at the surface through attrition of finer materials. based on morphology,mineralogy and the origin of lag from the cobar region of australia, lag may be conveniently grouped intothree broad morpho-mineralogical categories; (a) those with a rough, blocky, lithic morpholog...

• Skarn-type mineralization of the Cuonadong Sn-W-Be polymetallic deposit occurred at ca. 15 Ma. Skarn-hosted scheelite can be divided into an older type 1 and a younger 2 scheelite. The ore-forming fluid was exsolved from Miocene leucogranite. Geochemically isotopically, modified by intense fluid-rock interaction during skarnization greisenization. is first rare-metal with extraordinary metall...

Strontium isotope sourcing has become a common and useful method for assigning sources to archaeological artifacts.In Chaco Canyon, an Ancestral Pueblo regional center in New Mexico, previous studiesusing these methods have suggested that significant portion of maize and wood originate in the Chuska Mountains region, 75 km to the West [corrected]. In the present manuscript, these results were t...