Petrological Journal

The major, minor and rare earth elements (REE)â variations in hydrothermal alteration zones in the volcanic rocks of the west of Naein ophiolite (Central Iran)

Neda Tavakoli; Elaheh Namnabat; Moussa Kalimi Noghreyan; Mohammad Ali Mackizadeh

Volume 5, Issue 17 , April 2014, , Pages 137-150

Abstract

The study area is located 39 km northwest of Naein and is a part of the Urumieh- Dokhtar volcano plutonic arc. The volcanic and pyroclastic rocks have been altered by hydrothermal fluids. ... Read More

REE geochemistry in skarn garnets from Khut and Panah-Kuh Ore feposit, West of Yazd

Azam Zahedi; Mohammad Boomeri; Mohammad Ali Mackizadeh

Volume 4, Issue 13 , April 2013, , Pages 47-66

Abstract

The Khut and Panah-Kuh skarn deposit is located at about 50 km northwest of Taft in Yazd province. The analyses of major and REE's by microprobe and LA-ICP-MS show that there are two ... Read More

Skarn mineralization in north part of Kal-e Kafi and its relation with Kal-e Kafi intrusive body

Saeideh Ranjbar; Moussa Kalimi Noghreyan; Mohammad Ali Mackizadeh

Volume 3, Issue 9 , June 2012, , Pages 107-126

Abstract

The Kal-e Kafi granitoid body and related skarn, a part of the Central Iranian zone and the Yazd block, are located 60 Km Northeast of Anarak (Northeast of Isfahan province). This Late ... Read More The Kal-e Kafi granitoid body and related skarn, a part of the Central Iranian zone and the Yazd block, are located 60 Km Northeast of Anarak (Northeast of Isfahan province). This Late Eocene-Oligocene granitoid body intruded into the Eocene volcanic, volcaniclastic rocks and the Anarak metamorphic units, giving rise to the formation of widespread hornfels and limited skarn deposits. Different lithological units from gabbro to microgranite are the main constituents of this large and complex intrusive body. The geochemical data as well as the petrographic studies show that monzonite to quartz monzodiorite are in close relationship to skarn mineralization. Also, these rocks, display characteristics of high potassium calc-alkaline, metaluminous and I type magma. Using geochemical discrimination diagrams, the magmatism developed in VA related late geotectonical environment. On the base of the aforementioned data and comparison with chemical composition of some world's skarns forming granitoid, it can be concluded that the Kal-e Kafi skarn is Cu-Au-Fe type. Field and petrographic studies document that there are five stages in the skarn evolution. Several samples from mineralized quartz veins were used for fluid inclusion geothermometry. Considering the homogenization temperature of quartz veins and some secondary textures in ore minerals, the ore mineralization stage and veining are simultaneous. The boiling evidences in fluid inclusions are considered the most important factor for ore deposition in the temperature range of 250-375 Â°C. Boiling is also caused the occurrence of two distinct fluids together high- (type V) and low-salinity (type I, IV) fluids. Metals transported as chloride complexes and precipitated as sulfide minerals while the boiling process was ended. The opaque minerals (chalcopyrite, pyrite and magnetite) formed in the final stage of skarn formation, due to decreasing temperature (150-200 Â°C) and increasing oxidation conditions, were altered into goethite, bornite, covellite and martite, respectively. Tectonic movement and the occurrence of many faults in the area, play an important role in the quartz veins emplacement and ore mineral alteration stage. The calc-alkaline and I type Kal-e Kafi intrusive body can be proposed as the source of Cu, Fe and Au bearing hydrothermal fluids and skarn mineralization.

Geology, geochemistry and behavior of rare earth element in the hydrothermal alteration zones, Karkas Mountain North of Isfahan

Mohammad Ali Mackizadeh; Batoul Taghipour

Volume 2, Issue 8 , January 2012, , Pages 55-68

Abstract

The Eocene volcanic rocks in the south of Karkas region have been subjected to alteration by hydrothermal and the late magmatic fluids. These volcanics are acidic to intermediate in ... Read More

Elements variations and the origin of fluids during the hydrothermal alterations in the Astaneh-Arak granitoid

Rahimeh Mikaili; Moussa Kalimi Noghreyan; Mohammad Ali Mackizadeh; Batoul Taghipour

Volume 2, Issue 7 , June 2011, , Pages 119-134

Abstract

Seven distinct hydrothermal alteration zones developed within the Astaneh granitoid. The phyllic and silicic alterations have a wide extension in the study area. In the phyllic alteration, ... Read More

The study of fluid inclusion and mineralogy in the hydrothermal alterations of Astaneh granitoids (Sanandaj_Sirjan zone)

Rahimeh Miekaily; Moussa Kalimi Noghreyan; Mohammad Ali Makki zadeh; Batoul Taghipour; Zahra Tahmasbi

Volume 1, Issue 3 , December 2010, , Pages 89-106

Abstract

The middle-Jurassic Astaneh granitoid body is composed of mainly of granodiorite. From the ancient time, Au mineralization and prospecting site have been known. The Astaneh granitoid ... Read More

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Author = Makki zadeh, Mohammad Ali

The major, minor and rare earth elements (REE)â variations in hydrothermal alteration zones in the volcanic rocks of the west of Naein ophiolite (Central Iran)

Abstract

REE geochemistry in skarn garnets from Khut and Panah-Kuh Ore feposit, West of Yazd

Abstract

Skarn mineralization in north part of Kal-e Kafi and its relation with Kal-e Kafi intrusive body

Abstract

Geology, geochemistry and behavior of rare earth element in the hydrothermal alteration zones, Karkas Mountain North of Isfahan

Abstract

Elements variations and the origin of fluids during the hydrothermal alterations in the Astaneh-Arak granitoid

Abstract

The study of fluid inclusion and mineralogy in the hydrothermal alterations of Astaneh granitoids (Sanandaj_Sirjan zone)

Abstract