Geochemical Exploration of the Tareek Darreh Gold Deposit, North of Torbat-e Jaam, East Iran

Iranian Journal of Earth Sciences

مقاله 8، دوره 3، شماره 2، دی 2011، صفحه 175-183   

نوع مقاله: Original Research Paper

نویسندگان

K. Shabani¹؛ N. Nezafati^{* 1}؛ M. Momenzadeh²؛ I. Rassa³

¹Islamic Azad University, Science and Research Branch, Tehran, Iran.

²Zarneh Research Group, Tehran, Iran.

³Shahid Beheshti University, Tehran, Iran.

چکیده

The Tareek Darreh gold deposit is located 40km north of Torbat-e Jaam in the Khorassan-Razavi province, NE-Iran. The study area mainly comprises slightly metamorphosed, sedimentary rocks of Jurassic age including alternation of shale, siltstone, and sandstone. These rocks have been intruded by plutonic rocks such as gabbro-norite, diorite, quartz-diorite, and rhyodacite. The ore bodes are exposed by trenching and pitting .In this study, all trenches and pits were systematically sampled and analysed by XRF, XRD, and ICP methods as well as petrological mineralogical studies. The alteration minerals of quartz, chlorite, albite, and sericite are mostly observed on the top or margin of the stocks. Alteration is more intensive at the contacts of the stocks where vein type mineralization has occurred. The veins are mainly composed of silica type and calcite type, arsenopyrite, chalcopyrite, and pyrite main ore minerals. Four promising mineralization zones were selected for further studies. The analytical results for the zones No. 2 and No. 4 confirm high gold, copper, bismuth, tellurium, and silver. In zone No. 2 (50 x 80 m2) an average of 3.5ppm gold was recorded for one of the trenches, while in zone No. 4 (50 x 250m2) the average gold content is 1.35ppm. According to our studies, The Tareek Darreh gold deposit is considered to be similar to the \"intrusion-related gold systems\".

کلیدواژه‌ها

Tareek Darreh Gold Deposit؛ Geochemical exploration؛ Intrusion-Related Gold Systems؛ East Iran