Abstract
The explosion area of Meshkin Shahr is about 2100 square meters and its mineral site is located in the heights of 2650 meters in Sabalan mountains. This site is situated between Meshkin Shahr and Sabalan villages at about 45 kilometers of the south of Sabalan. In 2009, several geochemical investigations were conducted into this site. The area is covered with volcanites and Eocene sediments which have been interrupted by the intrusions of granodiorite and daciteoids. Volcanites and intrusive rocks have been altered in a zone of about 2 square kilometers. The alteration is more of argillic, silicified and sericite variations, but its severity is extremely diverse. The most severe alteration is observed in the central parts of this zone. Furthermore, limonitization is relatively seen in a wide area of this zone in the figure of veinlets and colonization indicating sulfide mineralization underneath the weathering zone. Secondary minerals are rarely found.
Highlights
The investigation into Meshkin Shahr area can be divided into two parts
The explosion area of Meshkin Shahr is about 2100 square meters and its mineral site is located in the heights of 2650 meters in Sabalan mountains
This site is situated between Meshkin Shahr and Sabalan villages at about 45 kilometers of the south of Sabalan
Summary
The investigation into Meshkin Shahr area can be divided into two parts. The first part is related to the geology of the area while the other deals with the economic geology surveys. The lithology of Meshkin Shahr is divided into four parts from the center outwards. Deposits which are made of igneous rocks, whose proportion is more exotic than the constituent rocks of Meshkin Shahr in terms of lithology, they clearly show the properties of sedimentary rocks and deposits such as layering, gradual layering, diagonal and rounded stratification and sorting (Figure 2). The thickness of these deposits sometimes exceeds 150 meters. A majority of the lithological composition of this group contains more varieties of diverse rocks including granodiorite, porphyry granodiorite, quartz diorite, quartz monzodiorite, diorite, rhyodacite, dacite, quartz dacite and diorite [2]
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