Petrology and Origin of Intrusive Masses of Zaker Located in NE of Zanjan

• 作者: Afshin Ashjae-Ardalan Jamal Sheikh-Zakariai Mahboubeh Mansouri Mohammad Lotfi
• 来源期刊: 地质学期刊(英文)
• 学科: 地球科学
• 关键词: PETROLOGY GRANITE ALBORZ Partial MELTING Iran
• 年，卷（期）: 2017,（7）
• 页码范围: 1000-1011
• 页数: 12页
• 分类号: P5

摘要

The study area, in east of Zanjan, with NW-SE trend exposed and structurally is located in Alborz-Azarbaijan zone and Tarom subzone. The mass composition is in monzogranite, quartz-monzonite, monzonite, quartz-monzodiorite and monzodiorite range. It belongs to high K calc-alkaline to Shoshsonitic magmatic series. According to the geochemistry and petrogenesis results, partial melting of magma has been the important controlling process of rock variety in the study area. All samples have negative anomalies of Nb that is related to subduction and active continental coastline zones as well as high anomalies of K, Rb and Ba explaining the role of continental crust or contamination with the continental crust. Granitic volcanic arc related environments and syenite alkali feldspar masses reflect the granite mass within the plate. Monzonites and diorites point to the volcanic arc and syenite and granite masses show within the plate environments.