Identification of geochemical anomalies of the porphyry–Cu deposits using concentration gradient modelling: A case study, Jebal-Barez area, Iran

Mansour Ziaii, Samaneh Safari, Timofey Timkin, Valery Voroshilov, Tamara Yakich

Research output: Contribution to journalArticle

Abstract

This paper presents a novel gradient model for exploration of blind mineralization. The concentration gradient coefficient techniques have been proved to be very well-suited for typical mining geochemistry applications. Gradient concentration corresponds to concentration variations. Large concentration changes due to geochemical data distribution correspond to surfacing anomaly, and less concentration variations are more likely to be related to the deeper geochemical anomalies. The introduced technique is capable to distinguish the difference between the blind mineralization and zone dispersed mineralization, computationally and without exploration drilling. In this research, deep geochemical anomalies are investigated using the gradient concentration values for the porphyry–Cu deposits of the Jebal-Barez region in Iran. Based on the results obtained from the proposed gradient model, values >1.0 in G(Vz) reveal the existence of blind mineralization in the study zone. The findings based on this method suggest that SW of Jebal-Barez is a highly favourable zone for exploration of blind mineralization. The value for G(Vz) in this zone is equal to 5.04. The results obtained in this research were consistent well with the findings of the previous research in the area and the detected Kerver as the main blind mineralization in Jebal-Barez. A local exploration was carried out in this zone in four areas of Kerver using the gradient model.

Original languageEnglish
Pages (from-to)16-30
Number of pages15
JournalJournal of Geochemical Exploration
Volume199
DOIs
Publication statusPublished - 1 Apr 2019

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Keywords

  • Blind mineralization (BM)
  • Concentration gradient modelling
  • Identification of geochemical anomalies (IGA)
  • Zone dispersed mineralization (ZDM)

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Economic Geology

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