Robab Hajialioghli | University of Tabriz (original) (raw)

Papers by Robab Hajialioghli

The Takab meta-ultramafic rocks of northwestern Iran crop out in association with a variety of me... more The Takab meta-ultramafic rocks of northwestern Iran crop out in association with a variety of metamorphic rocks and they can be divided into three types on the basis of dominant mineral assemblage and degree of serpentinization: meta-peridotites, talc-serpentine rocks and serpentinites. The peridotite protoliths were mainly spinel-harzburgites and-dunites. The talc-serpentine rocks formed under low-grade conditions and their dominant mineral assemblage is lizardite/chrysotile + talc + calcite/dolomite. Pseudomorphic textures after olivine and pyroxene are typical. Later lower amphibolite-facies metamorphism produced antigorite, clinochlore and tremolite. Late alteration, assisted by local shearing, produced more antigorite and late lizardite in the meta-peridotites. The mineral chemistry of the serpentine polymorphs is variable. Compositions of coexisting spinel and olivine point to an ophiolitic origin. Thermometric estimates from co-existing relict olivine, pyroxenes and spinel are in the range 1000À1200ºC; clinopyroxene barometry yields a pressure of 24˘2.7 kbar for these mantle conditions. Exhumation and hydration followed, and the stability of lizardite/chrysotile constrains the T and X CO 2 to <280ºC and <0.002, respectively. Subsequent prograde regional metamorphism took place in an orogenic setting, reaching peak temperatures in the range 410À540ºC at X CO 2 >0.1. A Neoproterozoic-Early Cambrian age for the Takab protoliths is suggested on the basis of correlations with the Central Iran Zone. The strips of ultramafic rock in the Takab complex can be attributed to lithospheric remnants of the Proto-Tethyan ocean which closed during the Pan-African orogeny.

Sustainable Materials and Technologies, Jul 1, 2018

This paper presents the results of a study on properties of cement mortars containing high volume... more This paper presents the results of a study on properties of cement mortars containing high volume of raw diatomite powder as replacement of cement. The use of high volume of pozzolanic powders decreases the demand for cement in the construction industry and thus reduces the cost of concrete production and lessens the environmental pollution caused by the co2 emission from the cement factories. The aim of this study is to investigate key properties of environmental-friendly cement mortars using raw diatomite powder as replacement of cement in different contents. In this study, cement mortars containing four different contents of raw diatomite powder as replacement of cement (0, 15, 30 and 40 by weight of total cementitious material) are examined. The flowability of cement mortars was observed through flow table test. The compressive strength and direct tensile strength were measured at 3, 7, 28 and 91 days as strength properties. Water absorption and pulse velocity tests were investigated for various cement mortar mixtures at 28 days as transport properties and durability indexes. An environmental impact assessment was also applied on all cement mortar mixes based on eco-balance method to quantify and evaluate the environmental impact of partially replacing cement by raw diatomite powder. Test results indicated that diatomite powder can be used as replacement of cement up to 40% without significant loss in compressive strength along with an improvement in tensile strength and transport properties of cement mortars, at the later aging times. The experimental results on strength and transport properties represent a very effective and successful use of high volume raw diatomite powder to produce an environmental-friendly and affordable cement-based material. Sustainability assessment shows a significant reduction in environmental impact of mortars containing high volume of raw diatomite powder.

مجله بلورشناسی و کانیشناسی ایران, 2018

The Ghikhlar area is located at the NW Marand town, East Azarbaidjan. The wide range of Plio-Quat... more The Ghikhlar area is located at the NW Marand town, East Azarbaidjan. The wide range of Plio-Quaternary volcanic activites with volcanic and associated volcano-clastic rocks having compositions mainly as andesite to silica-undersaturated rocks (leucite basanite, leucitetephrite and tephrite) have been covered mostly the rock units prior to the Cenozoic. The phenocrysts in andesites are amphibole, plagioclase and clinopyroxene which occurred in microcrystalline and microlithic matrix. The main characteristic of these rocks is bearing various enclaves as autholiths and xenoliths. The clinopyroxenes in the host andesite and cumulative enclaves are diopside to augite. The autholithic andesitic and dioritic enclaves indicates compositions as augite and dipside, respectively. Investigation of mineral chemistry and magmatic features for the host andesitic rocks and their enclaves are the main goal of this research. Variety of magmatic enclaves are including homogenic, cumulative and gabbroic ones. They all show similar mineralogy with host andesitic rocks whereas they are different texturally. Homogenic and gabbroic enclaves are more fine and coarse grained than host andesite, respectively. Cumulative enclave has been formed as aggregation of coarse grained ferromagnesian crystals similar with phenocrysts of andesite. On the basis of mineral chemistry data, composition of the host andesite as well as homogenic and cumulative enclaves are subalkaline with arc magmatic tectonic setting feature. However gabbroic enclave with alkaline characteristic corresponds to interior plate tectonic setting. Considering mineralogy, textural evidence and mineral chemistry data from the host andesite and their magmatic enclaves it can be concluded that the homogenic and cumulative enclaves are autoliths. The homogenic enclave corresponds to chilled margin of magma reservoir which disjoined during upward ascending of andesitic magma and their falling into magma chamber. Cumulative enclave resulted from aggregation of magmatic minerals in the magma chamber. About genesis of the gabbroic enclave it seems that gabbroic enclave has exotic genesis. Gabbroic rocks fall into andesitic magma during magma passing upward.

فصلنامه علمی علوم زمین, May 22, 2011

Iranian Journal of Crystallography and Mineralogy, 2021

Iranian Journal of Crystallography and Mineralogy

CITATIONS 0 READS 85 3 authors: Some of the authors of this publication are also working on these... more CITATIONS 0 READS 85 3 authors: Some of the authors of this publication are also working on these related projects: Detrital zircon ages from Cambrian sandstones of NW Iran View project Metamorphic and igneous rocks from te Golpayegan area, Sanandaj-Sirjan metamorphic belt. View project

Serpentinizedperidotites are a part of the coloured mélange complex in the Salmas area. The serpe... more Serpentinizedperidotites are a part of the coloured mélange complex in the Salmas area. The serpentinization degree of peridotites is variable. Mesh and bastite textures (pseudomorphic textures after olivine and pyroxene respectively) are the dominant textures in these rocks. According to the textural and petrographical studies and XRD analyses, lizardite and low abundant chrysotile are the main serpentine polymorphs in the serpentinizedperidotites. On the basis of mineral chemistry, the composition of serpentines from different textures (mesh or bastite) is variable and depends on the composition of the primary mineral. Presence of lizardite and absence of antigorite in the Salmasserpentinizedperidotites indicate that the serpentinization of peridotites has occurred under low temperature conditions (lower than 200°C). Petrographic studies show that serpentinization of the Salmasperidotites has occurred during several stages. Hydration of olivine and pyroxene (ortho-and clinopyroxen...

Petrology, 2017

The investigated granite intrusion is located at the north of Ayghalesi village, east of Takab Th... more The investigated granite intrusion is located at the north of Ayghalesi village, east of Takab The Ayghalesi granite has been intruded the Eocene sandstone and conglomerate rocks and low grade metamorphic hornfels have been metamorphosed host rocks. The main constituent minerals are K-feldspar, plagioclase, quartz and muscovite.and minor garnet. The main texture is granular but pegmatitic, myrmektitic, graphic and perthitic occur as minor textures. Chemically, the rocks are granite on the various classification diagrams. The Ayghalesi intrusion body is classified as S-type, peraluminous composition, calc-alkaline nature and is calcic-alkali to alkali-calcic on the base of modified alkali lime index (MALI). The investigated body, on the tectonic discrimination diagrams, fall on syn-collisional tectonic setting domain, suggesting that it was originated during collision of Central Iranian and Arabian plates Key words: granite,

East Salmas gneisses are located in the northernmost parts of the Sanandaj-Sirjan zone and are se... more 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.

Mineralogical Magazine, 2007

Journal of Mining and Geology, 2008

Petrology, 2018

The Alamdar rhyolite has been cropped out at the highest top of Mishow Mountain Ranges (i.e. Alam... more The Alamdar rhyolite has been cropped out at the highest top of Mishow Mountain Ranges (i.e. Alamdar top), east of Tasouj. Considering that the rhyolite has been intruded the Kahar Formation, its Precambrian age is more probable. The constituent minerals are quartz, K-feldspar and rare plagioclase characterizing by crystalline to hyalo-crystalline, microlitic porphyric, perthitic, hyalo porphyric and flow textures. Magmatic series of the rocks are high K calc-alkaline and shoshonite. In the view of Al-index, they are peraluminous. The investigated rocks have been classified as A-type (A2 subgroup) granitoids. REE diagrams show high enrichment of LREE relative to HREE and MREE. Spider diagrams have positive anamolies of K, Nd, Rb and negative anomalies of Ta, Nb, and Ti indicating their likely crustal source generation. On the basis of discrimination diagrams they are formed related to Post-COLG tectonic setting. Extensional regimes following to continental collision between Norther...

European Journal of Mineralogy, 2009

The Takab calcareous rocks of northwest Iran crop out in association with a variety of metamorphi... more The Takab calcareous rocks of northwest Iran crop out in association with a variety of metamorphic rocks including mafic granulites, amphibolites, granitic gneisses, pelitic schists and meta-ultramafic rocks. They can be divided into marbles and calc-silicate rocks on the ...

The Takht-e-Soleyman complex is formed from various rock types including metapelites, metabasites... more The Takht-e-Soleyman complex is formed from various rock types including metapelites, metabasites and marbles which are metamorphosed under green schist through amphibolite to granulite facies. The amphibolites have been melted partially under high temperatures and mafic migmatites are formed in this regard. The pick metamorphic minerals of garnet amphibolites have been completely replaced by the low temperature plagioclasehornblende symplectite. So, the pick metamorphic P-T conditions of these rocks (M1) have not been recognized due to the lack of proper mineral assemblage and chemistry of phases. The retrograde P-T conditions (M2) have been determined on the basis of textural evidence, equilibrium mineral assemblage and mineral chemistry as two stages: (1) the retrograde metamorphism as strong decreasing of pressure (M2-a) and (2) cooling and decompression stage during exhumation of the rocks (M2-b). The temperature and pressure conditions during M2-a and M2-b have been obtained a...

In order to assess the presence or absence of fluids under peak metamorphic conditions within the... more In order to assess the presence or absence of fluids under peak metamorphic conditions within the inner aureole of the Etive igneous complex in west Scotland, eight suitable metabasic hornfels samples and one suitable pelitic hornfels were used to calculate water activities using a mineral equilibria. Calculated activities for water are lower than unity in the pelitic sample and extremely low in the metabasic rocks. These low H 2 O activities due to dilution of water by other fluid species are unlikely, since no mineralogical evidence for the presence of other fluids were found in the studied rocks. As a consequence, the low H 2 O activities support fluid-absent conditions during the peak metamorphism of the inner aureole rocks. The findings from this study are in good agreement with calculated water activities using water contents of cordierite in the pelitic rocks for the same part of the aureole, suggesting that cordierite in metapelites retained its syn-metamorphic volatiles.