Irene del Real ContrerasUniversidad Austral de Chile · Instituto de Ciencias de la Tierra & Evolución
Irene del Real Contreras
PhD
About
23
Publications
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201
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Citations since 2017
Introduction
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January 2015 - July 2019
Publications
Publications (23)
Disruptions in the minerals supply chain play a central role in defining the future stock of minerals; therefore, an in-depth analysis of the outcomes and variables affecting exploration is required. In comparative terms, the exploration of critical minerals and major minerals presents geological and technical differences; thus, exploration budgets...
Iron oxide-copper-gold (IOCG) deposits are a globally important source of copper, gold and critical commodities. Despite their relevance, IOCG deposits remain an ill-defined clan, with a range of characteristics that has complicated development of the general genetic model. Here we focus on the Candelaria IOCG deposit in Chile and reveal that by us...
Exploration decisions play a key role defining future-long terms availability of critical minerals, despite the lack of indicators including this aspect in common criticality assessments. Considering the importance of exploration for long-term sustainability of the supply chain, and structural differences between major and critical minerals, we ana...
The youngest and best exposed Iron Oxide Cu–Au (IOCG) deposits currently recognized are found in the coastal
belt of the Andes. Their formation has been attributed to back-arc extension or transtension associated with the
convergent Andean margin. Here we document transpressional deformation synchronous with Cu mineralization
in the Candelaria-Punt...
Magnetite is the main constituent of iron oxide–apatite (IOA) deposits, which are a globally important source of Fe and other elements such as P and REE, critical for modern technologies. Geochemical studies of magnetite from IOA deposits have provided key insights into the ore-forming processes and source of mineralizing fluids. However, to date,...
Iron oxide-copper-gold deposits are a globally important source of copper, gold and critical commodities. However, they possess a range of characteristics related to a variety of tectono-magmatic settings that make development of a general genetic model challenging. Here we investigate micro-textural and compositional variations in actinolite, to c...
Magnetite is the main constituent of iron oxide–apatite (IOA) deposits, which are a globally important source of Fe and other elements such as P and REE, critical for modern technologies. Geochemical studies of magnetite from IOA deposits have provided key insights into the ore-forming processes and source of mineralizing fluids. However, to date,...
The Coastal Cordillera metallogenic province of northern Chile comprises several styles of mineralization, including stratabound Cu-(Ag), iron oxide-copper-gold (IOCG), iron oxide-apatite (IOA), and porphyry Cu deposits. Stratabound Cu-(Ag) or "Manto-type"deposits from the Coastal Cordillera of northern Chile formed during two main periods, i.e., t...
Pyrite is ubiquitous in the world-class iron oxide copper-gold (IOCG) deposits of the Candelaria-Punta del Cobre district, documented from early to late stages of mineralization and observed in deep and shallow levels of mineralized bodies. Despite its abundance, the chemical and isotopic signature of pyrite from the Candelaria-Punta del Cobre dist...
Iron oxide copper-gold (IOCG) and iron oxide-apatite (IOA) deposits are major sources of Fe, Cu, and Au. Magnetite is the modally dominant and commodity mineral in IOA deposits, whereas magnetite and hematite are predominant in IOCG deposits, with copper sulfides being the primary commodity minerals. It is generally accepted that IOCG deposits form...
Stratabound Cu-(Ag) deposits located in north-central Chile have been grouped into two NS parallel belts according to the age of their volcanic and volcanoclastic host rocks. Deposits from the Cretaceous belt are characterized by an unusual assemblage of Cu sulfides with migrated hydrocarbons, whereas the presence of organic matter has not yet been...
Pyrite (FeS2) chemistry can be used as an indicator for hydrothermal fluid evolution both in low and high temperature environments. Synchrotron scanning x-ray fluorescence is an efficient, non-destructive, imaging technique that can be used to map heterogeneous pyrite chemistry with excellent spatial resolution. The accuracy of quantified synchrotr...
The Candelaria-Punta del Cobre district is the largest Iron-Oxide Cu and Au (IOCG) district in the Chilean IOCG belt with more than 13 Mt of contained copper. Candelaria is the most important deposit in the district, which includes seven other smaller producers (Carola, Punta del Cobre, Mantos de Cobre, Candelaria Norte, Granate, Alcaparrosa, Ataca...
The Woodjam district is a cluster of porphyry Cu-Au deposits of Early Jurassic age (∼196 Ma) and is located in the Quesnel terrane in central British Columbia. Porphyry centers include the Southeast zone Cu-Mo porphyry, the Deerhorn and Megabuck Au-Cu porphyries, and the Takom and Three Firs Cu-Au porphyries. The Takomkane batholith, which intruded...
The Candelaria-Punta del Cobre Iron-Oxide Copper-Gold (IOCG) district covers a significant area (~18 x 12 km) and hosts eight active mines and numerous prospects. Major centers of IOCG mineralization are mainly located in volcanic units that occur at the base of the Chañarcillo extensional basin. The basin was inverted during the Late Cretaceous. P...
Resumen. El distrito El Espino es caracterizado por una sucesión marina (Miembro El Espino) que es parte de las cuencas extensionales formadas entre el Jurásico Superior-Cretácico Inferior y cuenta con un depósito IOCG homónimo al distrito y una serie de intrusiones. En el presente estudio se caracterizó y analizó la geología, estructura y origen d...
The Chañarcillo Basin is an Early Cretaceous extensional basin in northern Chile (27-29�°S). The folding
style of the syn-rift successions along the eastern side of the basin reveals an architecture consisting of
a NNE-trending anticline “Tierra Amarilla Anticlinorium”, associated with the inversion of the Elisa de
Bordos Fault. A set of balanced c...
En los cuadrángulos de Camiña, Cerro Socora, Mauque y Pisiga-Chile, se describe preliminarmente la geología de la Precordillera y Cordillera Occidental entre los 19º15’ y 19º30’S. En ellas se observan estructuras pertenecientes al West-Vergent Thrust System y EastVergent Thrust System que implicaron directamente la morfología de la zona durante el...
T. (2013): Paragenesis and alteration of the Southeast Zone and Deerhorn porphyry deposits, Woodjam property, central British Columbia (parts of 093A); in Geoscience BC Sum-mary of Activities 2012, Geoscience BC, Report 2013-1, p. 79–90.
Questions
Question (1)
I analyzed high temperature hydrothermal pyrites for trace elements using a XSeries 2 ICP-MS coupled to a Laser Ablation system. I carried on the measurements using a beam diameter of 75 μm. Once I got my data and corrected using standards (GSC, GSD and GSE) elements that have ~>10,000 ppm concentration are around 2 orders of magnitude higher than expected (compared to EMPA measurements on the same crystals). Is there a way of correcting the machine over-range or saturation?
