Boninites are rare high magnesium andesites that often contain trace chromites. These chromites precipitate from primitive boninitic melts and thought to be carried the surface in continue crystallize a significant volume of silicate minerals. Such magmatic differentiation drives chromite out equilibrium with residual melt respect both divalent trivalent cation proportions. Diffusion then opera...

The link between the Permian–Triassic mass extinction (252 million years ago) and emplacement of Siberian Traps Large Igneous Province (STLIP) was first proposed in 1990s. However, complex cascade volcanically driven environmental biological events that led to largest known remains challenging reconstruct. In this Review, we critically evaluate geological evidence discuss current hypotheses sur...

The Northern Carnarvon Basin (NCB) hosts an extensive record of Jurassic–Cretaceous rift-related igneous activity, manifested by a >45 000 km2 intrusive complex and series volcanic centres constrained seismic mapping. However, there are relatively few well penetrations these rocks (<1% ~1500 exploration wells) in comparison to other basins that witness magmatism, thus, their lithological ...

In the north of Fayoum Governate, Egypt, numerous extrusive flows basalt rocks exposed on surface and affected by weathering erosion, forming altered sheets which is case Jebel-Qatrani. The study objective comes in two main folds: first, to choose optimum parameters required for filed survey generating forward models using several arrays with 3% Gaussian random noise, simulating geology area de...

The Demerara Plateau (offshore Suriname and French Guiana) is located at the junction of Jurassic Central Atlantic Cretaceous Equatorial Oceans. study its crustal structure fundamental to understanding tectonic history, relationship with adjacent oceanic domains enlightening formation Transform Marginal Plateaus (TMPs). This presents two wide-angle seismic velocity models from MARGATS cruise ex...

in the central iranianvolcanic belt (civb), north-west of shahre-babak, in the area of javazm, dehaj and khabr, about 60 subvolcanic porphyritic dacitic to rhyodacitic domes (1-10 km2) are intruded into a variety of rock sequences from mesozoic to early miocene in age. these rocks are a part of dehaj-sardoieh belt. the civb contains intrusive and extrusive rocks of cretaceous-quaternary age. ge...

BACKGROUND Limited orthodontics are shown to be effective in the correction of infrabony defects. Studies have also demonstrated the efficacy of using enamel matrix derivative (EMD) with demineralized freeze-dried bone allograft (DFDBA) to treat infrabony defects. This study aims to compare the clinical efficacy of limited orthodontics combined with EMD/DFDBA in the treatment of 2- or 3-wall in...

Traumatic Dental Injury (TDI) is often caused by a bruise from a sports-related incident or fall. In individuals with maxillary protrusion, the risk for TDI may be higher. We treated a patient with Hereditary Gingival Fibromatosis (HGF), a rare genetic disorder characterized by proliferative fibrous overgrowth of gingival tissue, who subsequently received a TDI after periodontal surgery. A 13-y...

Field evidences, petrographic features and geochemical studies show that the garnet-muscovite granitoids of Boland Parchin area are S-type and they have sharp contact with the host rocks (metamorphic rocks). Granitoids of Boland Parchin contain minerals such as quartz, K-feldspars, plagioclase, biotite and Al-rich minerals (such as muscovite and garnet). Chemical composition of K-feldspars, pla...