Determination of mineral chemistry, temperature-pressure gaugeand depth of emplacement of granitoid magmas in the Ardestan region
Journal Title: Journal of Biodiversity and Environmental Sciences (JBES) - Year 2015, Vol 6, Issue 1
Abstract
Felsic intrusions in the studied area are post Eocene and this region is located in the northeast of the Esfahan province. This area belongs to Uremia - daughter magmatic belt in Central Iran. Composition of Felsic intrusions are granodiorite and tonalite. The main minerals include: quartz, plagioclase, alkali feldspar and ferromagnesian minerals are amphibole are biotite. Most of ferromagnesian minerals alterated to chlorite and epidote. On the base of geochemical studies, granitoids are ranging from sub-alkaline, meta aluminous, magnesium series and Itype igneous rocks .Mineral chemistry study shows that rock formation pressure between 1 and3 plagioclaseamphibole minerals Kylubar budhcouple the rmome terand the temperature of700to 750° C for the bulk of the show. Felsic magma are generated partial melting of crustal protoliths and mantle-derived basaltic magmas emplaced into the lower crust. These felsic intrusions rocks have mineralogical field and geochemical characteristics typical of volcanic arc granites related to an active continental margin. Probably, the Ardestan granitoids are the result of the subduction of neo- Tethyan oceanic plate below the Lutmicrocontinent and this oceanic residual plate during Mesozoic to Cenozoic time. Dehydration of subducted oceanic crust and partial melting of mantle wedge caused partial melting of sub continental lithosphere, which resulted in the formation of metasomatized and enriched mafic arc magmas, and led to the formation of the Ardestan granitoid. These rocks enriched of LILE such as Rb, Ba, K, Ce and depletion of HFSE such as Y, Nb and Zr. REES chondrite normalized patterns indicate moderate to high enriched LREEs [(La/Yb)N= (1.27-18.22)] and a relatively depleted of HREEs [(Gd/Yb)N= )1/02-3/32)] with Eu Negative anomalies [Eu/Eu*= (9.55-9.57)].
Authors and Affiliations
Mehranfar Marzieh, M. Vossoughi Abedini, A. Nasr Esfahani, M. H. Emami
Keywords
Related Articles
- EP ID EP38199
- DOI -
- Views 175
- Downloads 0
Identifying constraints of bio-fertilizer adoption (Azospirillum and Azotobacter Bacteria) by corn farmers of shoushtar township, Iran
Use of bio-fertilizers is one of the important components of nutrient management, as they are renewable source of plant nutrients to supplement the chemical fertilizers for sustainable agriculture. This study is aimed a...
Evaluation of the Key Success Factors of Drought Management Based on Knowledge Management in Iran
Drought is a gradual and creeping phenomenon and including a period of abnormal and dry weather conditions, to be Durable enough arises a serious imbalance in regional hydrological situation. Iran due to its geographica...
Climate change cost upon ecosystem services in the Sundarban mangrove forest in Bangladesh
The Sundarban forest, known as the mangrove protection region by the UNESCO for numerous world endangered species, is located in the southwest of Bangladesh that lies between the delta of the Ganges, Brahmaputra and Megh...
Assessment of hydrographic and oceanographic studies of right bank outfall drain, Gharo Creek Indus Deltaic Region
National Institute of Oceanography Pakistan was carried out the Hydrographic and Oceanographic studies of Gharo Creek for outfall structure designing.The proposed Right Bank Outfall Drain (RBOD) which is under constructi...
Effect of thiamine on blood glucose changes after maximal aerobic exercise in non-athlete university students male
This study is conducted with the aim of investigating the effect of vitamin B1 (Thiamine) on blood glucose changes. We observed that when the subjects received 300 mg thiamin /day, there was a lowering of blood glucose...