tertiary intrusive granitoids within the lut block in the khorasan razavi and south khorasan provinces are mainly sub-volcanic with porphyry texture and their composition varies from granite to diorite but monzonite is dominant. with the exception of hired, these are classified as belonging to the magnetite-series of i-type granitoids. chemically, these rocks are meta-aluminous. those with mine...

The Chah-Bagh gold occurrence is located in Muteh mining district, in the central part of the Sanandaj-Sirjan zone. Gold mineralization occurs in ductile to ductile-brittle shear zones and is comparable with orogenic gold deposits. Silicification and sulfidization are the most important hydrothermal alteration features in the inner parts of altered shear zones and coincide most closely with the...

BACKGROUND Asymptomatic malaria infection provides a reservoir of parasites, causing the persistence of malaria transmission. It accounts an important challenge for successful management of the control, elimination, and eradication programmes in any malaria-endemic region. This investigation was designed to assess the presence and the prevalence of asymptomatic carriers in Iranshahr district of...

The Baghuo gold mine (Kuhzar) is located about 100 km S-SE of Damghan. The area is part of Torud- Chahshirin volcano- plutonic belt. The hosts of quartz – tourmaline veins are mainly granite, granodiorite and volcanic rocks such as andesite and dacite.  Mineralization occurs as a copper- gold bearing silica vein. Quartz, pyrite, chalcopyrite, gold, hematite, malachite, azurite, covellite and Fe...

Many two-sided platforms (such as search engines and business directories) make pro…ts from auctioning their user base to advertisers. Yet, auctioning users is di¤erent from selling standard commodities, since the participation decision by users (and, therefore, the size of the platform’s user base) depends on the bene…t users expect to receive from joining the platform. In this setting, what i...

AbstraEt Supply chah management has become one of the most important sources of competitive advantage in different indusmes. For years, researchers have investigated the various processes within supply chain. There has been an increasing attention placed on perfomancc, design and analysis of supply chain. However, the-apply chain is a complex model so it is difficult to analyze the performance ...

a detailed study of the lower cretaceous dasyclad algae of the shahkuh formation was done in the chahpalang stratigraphic section (its name comes from the mountain in studied area). according to the study of the 101 thin sections, for the first time, we recognized 7 genus and 8 species of dasyclad algae from shah kuh formation in chah palang section including angioporella cf. fouryae, griphopor...