Azadeh Malekzadeh Shafaroudi; Mohammad Hassan Karimpour; Akbar Esfandiarpour
Volume 4, Issue 16 , February 2014, , Pages 105-124
The study area is located 50 km northeast of Nayband in the easternmost part of Yazd province. The area is a portion of the Tertiary volcanic-plutonic rocks in the west of the Lut block. ...
The study area is located 50 km northeast of Nayband in the easternmost part of Yazd province. The area is a portion of the Tertiary volcanic-plutonic rocks in the west of the Lut block. The geology of the region includes latitic to trachyandesitic lavas, which are intruded by subvolcanic rocks with monzonitic, syenitic and granitic compositions. The texture of all the intrusive rocks is porphyric to glomeroporphic. Plagioclase, K-feldspar, biotite and quartz are the main minerals of biotite quartz monzonite porphyry, biotite syenite porphyry and biotite granite porphyry. Clinopyroxene, besides these minerals is present in biotite-pyroxene monzonite porphyry. Based on geochemical studies, the biotite-pyroxene monzonite porphyry shows metaluminous and shoshonitic nature. This rock belongs to the magnetite series (oxidized) granitoid and is allocated to I-type. The relative enrichment of LREE versus HREE and enrichment of LILE and HFSE impoverishment indicate magma formed in subduction zone. The magma exhibits low degree of partial melting (>0.1 to