m. moazzen

The amphibolites of east Salmas, as one of the widest units of the metamorphic complex, are located in the northwest of Sanandaj-Sirjan zone, which according to field studies are mainly oriented and foliated amphibolites. Based on microscopic studies, amphibolites include amphibolites, biotite-amphibolites, epidote-amphibolite, biotite-epidote-amphibolite, tremolite-actinolite-amphibolite, and biotite-clinopyroxene-amphibolite. Amphibolite specimens of the region have maximum parallel pattern based on the variation diagrams of rare earth elements normalized to chondrite, EMORB and primary mantle and are similar to intra-plate basalts in terms of geochemical properties. According to the results of whole rock chemistry, the study amphibolites are mainly ortho-amphibolites with a basaltic protolith and calc-alkaline magmatic series, which are located in the intra-plate tectonic position.

East Salmas Metabasites, as one of the most extensive units of the metamorphic complex, is located in the northwest of Sanandaj-Sirjan zone. These metabasites are mainly composed of amphibolite and green shist, alternating with geniss, metadiorite and marble metamorphic rocks. Metabasites are structurally oriented and mass, and grain size varies from small to medium. According to microscopic studies, the regionchr('39')s metabasites are classified into 6 amphibolitic and 4 schist subgroups. Amphibole, plagioclase, mica, spinel, and quartz are the main minerals from the microprobe results of metabasite samples. According to the chemistry of minerals, amphiboles are composed of magnesium hornblende and ferrotschermakite, plagioclase with component of andesine, mica with type of phlogopite and spinel groups with component of Al-spinel. Chemical composition of amphibole and plagioclase minerals was used for themometry and barometry of metabasite rocks in the region. Thereforet the results show that regional metamorphic rocks are formed in moderate temperature (550-600 ° C) and pressure (4-6 kbar) ranges, Barrovian-type amphibolite facies, 30 ° C / Km geothermal gradient and in the intra-continental orogenic environments.

Granodiorite and dioritic intrusive rocks (Middle Eocene age) intruded the Lower-Middle Eocene volcanic rocks at the northern parts of the Torud-Chah Shirin volcano-plutonic belt in north east of Iran. This granodiorite is intruded by small rhyolitic dome in the Damghan turquoise-gold mine. According to all data, these intrusive rocks are related to a common source. The primary magma evolved by the assimilation, fractional crystallization, contamination (AFC) and magma mixing during the ascent. These processes formed granodiorite, diorite and rhyolitic magmatic rocks. Fractional crystallization of olivine, zircon, clinopyroxene, plagioclase and hornblende has been effective in the formation of granodioritic magma. Crustal contamination and fractional crystallization of apatite and Ca- plagioclase have played a major role in the formation of rhyolitic magma. Potassic feldspar has been present until the last stages of magma evaluation. In addition to the field evidences, present of apatite needles solid inclusions in plagioclase, corrosion, and oscillatory- reverse zoning in zoned plagioclases, enclave type and geochemical characteristics of whole rock (Nb/Y, Nb/Zr to Nb, Rb/Sr and Sr/Zr ratios) (Zr/Rb to Rb / Sr) confirm mixing between mafic and granodioritic magmas.

Sub-volcanic diorite and granodiorite intrusive bodies (Middle Eocene) and dome shaped rhyolite have intruded into Lower to Middle Eocene volcanic rocks in Torud-Chah Shirin magmatic segment. The granodiorite plutons and rhyolitic dome host turquoise and gold mineralization in Damghan mine. Intrusive bodies display characteristics of high potassium CA and meta-aluminous (diorite and some of granodiorite samples) to per-aluminous (rhyolite and some of granodiorite samples). Comparison of TiO2-La-Hf and Zr-Nb-Ce / P2O5 values, as well as Rb to Y + Nb ratios indicate that magmatism is related to post-collisional tensional regime after closure of Neotethys. On the other hand, the metasomatism of  mantle due to the fluids release from subducted oceanic slab has caused  high ratio of LILE / HFSE with negative anomalies of Ti, Nb and Ta in magma. Partial melting of the metasomatized mantle has led to the formation of primary magma, which eventually has generated diorite, granodiorite, and rhyolite magmas by fractional crystallization, crustal assimilation and magma mixing

East Salmas gneisses are located in the northernmost parts of the Sanandaj-Sirjan zone and are seen in banded and deformed with the 6 different groups of lithological diversity. Their protolith is of paragneiss type with arkosic sedimentary rock type.Texturally, they are immature. Based on this study, chemical maturation trend of protolith of the present investigated gneisses are in the arid to semi-arid boundary climatic conditions with average granite composition and chemical alteration index of about 55%. The linear trend in the diagrams of major oxides variations of the parent gneisses in the region confirms the partial melting and granitization of the genesis in these rocks. According to the pattern of normalized diagrams, these rocks show good agreement with typical paragneiss diagrams of the world. Investigating the various diagrams reveals that the tectonic setting of the gneisses is mainly of continental margin type with passive sedimentary trend.

Narigan area in the southern part of the Bafq-Saghand metallogenic zone in Central Iran is a host of davidite-bearing quartz veins. Davidite is an important key mineral for exploration of not only uranium but also REE's in Central Iran. Narigan granite in the Narigan area is characterized by high-K calc-alkaline nature and its parental magma was partially contaminated by the Precambrian crust. The REE pattern of quartz veins is brought about by REE contents in davidite. The homogenization temperatures of vapor-liquid-solid (V-L-S) fluid inclusions in quartzes are >500˚C in quartz veins. Furthermore, the ∑REE contents (71910 to 90292 ppm) and U/Th ratios (<1000) in the studied davidites indicate upper 450˚C temperature for the generation of them. Based on the similarity of REE pattern of davidite to REE pattern of oxide-uranium minerals in the vein-type ores (characterized by negative Eu anomaly and high LREE/HREE ratio) as well as achievement of the homogenization temperatures for fluid inclusions and davidite formation; mineralization of this mineral can be related to granite related vein-type uranium deposits.

The aqueous extract of some plants has an antibacterial effect on pathogenic bacteria for humans.

This study designed to investigate the antimicrobial activity of aqueous extract of some plants on some food-borne pathogenic bacteria in a laboratory setting has done.

In an experimental study, plants collected from of Tehran city and aqueous extract of them, extracted. To determine the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) with two ways of visual and turbidity (OD), serially different concentrations (1.25-80 mg/ml) on different cultures was prepared. Disc diffusion (DD) test in concentrations of 10, 20 and 40 mg/ml to determine the average diameter of inhibition for some bactria, done.

The results showed that the inhibitory and fungicidal aqueous extract of Solanum americanum on various bacteria was more than any other aqueous extracts (Staphylococcus aureus MIC = 10 mg/ml) and also Staphylococcus aureus and Salmonella typhimurium were the most sensitive and most resistant bacteria to aqueous extract, respectively.

According to the results, we can be hopeful the extract of Solanum americanum in the treatment of pathogenic bacteria such as S. aureus, can be help and it can used in the food industry as a food protection. Recommended by extracting the active ingredients of the extract of this plant and other plants, more research done on the composition of extract.

Amphibolitic rocks are the main part of the north of Khoy metamorphic complex. Petrographicaly these rocks are normal amphibolite, muscovite amphibolite, biotite amphibolite, garnet amphibolite and pyroxene amphibolite. The protolith of these rocks is mainly igneous. These rocks belong to tholeiitic and calc-alkaline series and Ocean Floor Basalt and Arc tectonic setting. These two distinctive tectonic setting clearly are distinguishable in REE and spider diagrams as samples from Oceanic Floor Basalt are steeper and enriched LREE than those from Arc samples.Considering the fact that Sialic Back Arc Basins can show MORB and Arc characters together, therefore probably amphibolitic rocks of study area generated in this tectonic setting.