Field work, GIS data compilation & interpretation
Geological mapping courses and coaching
Andreas Dietrich
Geologist (Dipl. Geol., Dr. rer. nat.)
Dietrich Consulting E.I.R.L. is a limited liability company registered in Santiago, Chile, providing geological mapping services and GIS solutions for the mining and exploration industry.
Andreas Dietrich is an exploration geologist with over 30 years of international mapping experience in mineral exploration and related academic research with emphasis on epithermal to porphyry type deposits in Latin America and the Circum-Pacific region.
Extensive exploration experience in epithermal Au-Ag and Ag-BM vein systems, HS epithermal systems, lithocap environments, Cu-Mo porphyry, Au-Cu porphyry, Sn-W-Ag porphyry systems, diatreme breccia-hosted systems, and Iron-Oxide-Copper-Gold (IOCG) environments.
Mapping services comprise personal field work and interpretation of satellite imagery, digitalization into GIS (Geographic Information System), and interpretation of observations together with additional exploration data.
Multi-layer lithologic, alteration and structural mapping. Identification of lithologic and structural controls of hydrothermal systems. Vectorization of mineral systems from proximal to distal.
District- to regional-scale GIS (Geographic Information System) projects integrate exploration project data with public data sets (geochemistry, hyperspectral data, geophysics, geological quadrangle sheets, geochronology etc.) and own field mapping observations for comprehensive interpretation of mineralized systems and guided decision-making in mineral exploration.
Geologic mapping courses explain in theory and practice the traditional craft of geological field mapping techniques under consideration of the specific needs of mineral exploration project . For more details click here.
Professional affiliations
Publications
Short courses and lectures
SEG Student Chapter Universidad Nacional del Altiplano Puno (UNAP), Peru, 2025-09-29: Mapeos de alteración y mineralización en ambientes de pórfidos hasta epitermales. – Online lecture
SGA Biennial Meeting 2025 short course program: Geological Mapping in Mineral Exploration. – 1 day workshop, Golden, CO, USA
ProExplo Conference 2025 short course program: Mapeos Geológicos en la Exploración Minera. – 1 day workshop, Lima, Peru
SEG Student Chapter Universidad Nacional del Altiplano Puno (UNAP), Peru, 2021: Geological Mapping in Mineral Exploration (Mapeos Geológicos en la Exploración Minera). – Online lecture
IUGS-IAGOD-AGA-SEGEMAR short course on Metallogenic Cartography Module 2, November 11-15, 2019: Porphyry Type Deposits. – 1 day workshop, Buenos Aires, Argentine
Peer-reviewed journal publications
Thomson, B., Tellez, C., Dietrich, A., Oliver, N., Akinin, V.V., Blenkinsop, T., Guskov, A., Benowitz, J., Layer, P.W., Polzunenkov, G. (2021): The Dvoinoye and September Northeast high-grade epithermal Au-Ag veins, Vodorazdelnaya district, Chukotka region, Russia – Mineralium Deposita 57: 353-376
Echavarría, L., Dietrich, A., Gutierrez, R., Rodriguez, M.E. (2021): Geology and epithermal silver-gold vein mineralization of the San José mining district, Santa Cruz province, Argentina – Journal of South American Earth Sciences 110 (103371), https://doi.org/10.1016/j.jsames.2021.103371
Dietrich, A., Gutierrez, C., Nelson, E., Layer, P. (2012): Geology of the Huevos Verdes vein system and San José district, Deseado massif, Patagonia, Argentina – Mineralium Deposita 47: 233-249.
Wittenbrink, J., Lehmann, B., Wiedenbeck, M., Wallianos, A., Dietrich, A., Palacios, C. (2009): Boron isotope composition of melt inclusions from porphyry systems in the Central Andes: a reconnaissance study. – Terra Nova 21-2: 111-118.
Kempe, U., Lehmann, B., Wolf, D., Rodionov, N., Bombach, K., Schwengfelder, U., Dietrich, A. (2008): U-Pb SHRIMP geochronology of Th-poor, hydrothermal monazite: An example from the Llallagua tin-porphyry deposit, Bolivia. – Geochimica et Cosmochimica Acta 72-17: 4352 – 4366
Dietrich, A., Nelson, E., Palacios, C., Layer, P. (2005): Geology of the Explorador Ag-Au vein system and Selene mining district, Apurimac, Perú. – In: Rhoden, H.N., Steininger, R.C., Vikre, P.G., eds., Geological Society of Nevada Symposium 2005: Window to the World, Reno, Nevada, May 2005, p. 741–756.
Reich, M., Parada, M.A., Palacios, C., Dietrich, A., Schultz, F., Lehmann, B. (2003): Adakite-like signature of Late Miocene intrusions at the Los Pelambres giant porphyry copper deposit in the Andes of central Chile: metallogenic implications. – Mineralium Deposita 38: 876-885.
Palacios, C., Townley, B., Dietrich, A., Wallianos, A., Lehmann, B. (2003): The magmatic evolution of the El Salvador copper porphyry system, Chile: New evidence from PIXE data on melt inclusions. – N. Jb. Geol. Palaeont. Mh. 9: 537-548.
Dietrich, A., Lehmann, B., Wallianos, A. (2000): Bulk rock and melt inclusion geochemistry of Bolivian tin porphyry systems. – Economic Geology 95: 313-326.
Lehmann, B., Dietrich, A., Wallianos, A. (2000): From rocks to ore. – Int. J. Earth Sci. 89: 284-294.
Lehmann, B., Dietrich, A., Heinhorst, J., Mosbah, M., Métrich, N., Palacios, C., Schneider, H.-J., Wallianos, A., Webster, J., Winkelmann, L. (2000): Boron in the Bolivian tin belt. – Mineralium Deposita 35: 223-232.
Lehmann, B., Dietrich, A., Wallianos, A., Oyarzún, J., Palacios, C., Riera-Kilibarda, C., Townley, B. (2000): Metallogenic model for porphyry systems in the Central Andes. – Zeitschrift f. Angewandte Geologie SH1: 179-186.
Dietrich, A., Lehmann, B., Wallianos, A., Traxel, K., Palacios, C. (1999): Magma mixing in Bolivian tin porphyries. – Naturwissenschaften 86: 40-43.
Conference abstracts
Dietrich, A (2025): How new technologies have changed geological mapping in mineral exploration. – XIV International Congress of Prospectors and Explorers ProExplo 2025, Lima, Peru, 2p
Dietrich, A (2023): Back to the Future: Geologic mapping provides the framework to validate and integrate data from new exploration tools. – XIII International Congress of Prospectors and Explorers ProExplo 2023, Lima, Peru, 2p
Dietrich, A (2019): Geological and structural evolution of the epithermal Au-Ag metallogenic province Deseado Massif, Patagonia, Argentina. – SEG 2019 conference proceedings, 2p
Dietrich, A., Tellez, C., Thomson, B., Akinin, V., Benowitz, J., Layer, P.W. (2018): High-grade epithermal gold mineralization at Dvoinoye, Chukotka, Russian Federation. – 15th Quadrennial IAGOD Symposium proceedings: 25-26.
Dietrich, A., Gutierrez, R., Nelson, E.P., Layer, P.W. (2008): Geology of the epithermal Huevos Verdes vein system and San Jose district, Deseado massif, Patagonia, Argentina. – PACRIM Congress 2008 extended abstracts volume, Gold Coast, Queensland, Australia: 109-113.
Dietrich, A., Palacios, C., Nelson, E.P., Layer, P.W. (2007): Geology and evolution of the Selene epithermal precious metal vein district, Apurimac, Peru. – Proexplo Conference abstracts, Lima, Peru.
Dietrich, A., Nelson, E., Gutierrez, R., Layer, P. (2005): Structural control of vein formation and mineralization at the epithermal Huevos Verdes Ag-Au vein system, San José district, Deseado massif, Patagonia, Argentina. – SEG-GSA Annual Meeting abstracts, Salt Lake City, Utah.
Dietrich, A., Nelson, E., Ambrose, A. (2005): Patagonia: Southern South America’s metallogeny and geology. – PDAC abstracts volume. Toronto, Canada.
Dietrich, A., Nelson, E., Gutierrez, R., Layer, P. (2005): The Huevos Verdes low sulfidation Ag-Au vein system, San Jose district, Deseado Massif, Patagonia, Argentina: Geological setting and controls on ore formation of a new mining enterprise. – Geological Society Nevada Symposium 2005 abstracts volume, Reno, Nevada.
Dietrich, A., Nelson, E., Palacios, C., Layer, P. (2005): Geology of the caldera-hosted, low- to intermediate-sulfidation style Explorador Ag-Au vein system, Selene mining district, Apurimac, Perú. – Geological Society Nevada Symposium 2005 abstracts volume, Reno, Nevada.
Wolf, D., Schwengfelder, U., Bombach, K., Kempe, U. Lehmann, B., Dietrich, A. (2003): Pb/Pb single zircon evaporation dating at the Sn porphyry of Llallagua, Bolivia. – Terra Nostra Vol. 18: p. 87
Palacios, C., Dietrich, A., Nelson, E. (2004): Geological setting of the Explorador vein system, Selene mining district, Apurimac, Peru. – GSA conference, Denver
Gutierrez, R., Dietrich, A., Nelson, E. (2004): Geological setting and characteristics of the volcanic hosted Ag-Au San Jose mining district, Patagonia, Argentina, GSA conference, Denver
Dietrich, A., Inga, A. (2002): The Zn (Pb, Ag) veins of Colquecahua, La Paz, Bolivia. – XI Congreso Peruano de Geología, September 2002, Lima, Peru, Abstract Vol. p. 234
Dietrich, A., Lehmann, B., Wallianos, A., Palacios, C. (1999): Magmatic evolution of Bolivian tin porphyry systems. – GAC-MAC conference, May 1999, Sudbury, Canada, Abstract Vol. 24: p. 31.
Dietrich, A., Lehmann, B., Wallianos, A. (1999): Highly fractionated composition of quartz-hosted melt inclusions of Bolivian tin porphyry systems. – XV ECROFI conference, Potsdam, Germany, Terra Nostra 99/6: 80-82.
Dietrich, A., Lehmann, B., Wallianos, A., Traxel, K. (1999): High copper and silver abundances in melt inclusions of Bolivian tin porphyry systems. – In: Stanley et al. (eds.) Mineral Deposits: Processes to Processing: 337-340, Proc. 5th Biennial SGA Meeting, London; Rotterdam (Balkema).
Wallianos, A., Dietrich, A., Lehmann, B., Mosbah, M., Traxel, K. (1999): Trace element analyses of melt inclusions as probes for the evolution of Bolivian tin porphyry deposits. – Nuclear Instruments and Methods in Physics Research B 158: 621-627.
Dietrich, A., Lehmann, B., Wallianos, A., Traxel, K. (1998): Contrasting melt inclusion and bulk rock geochemistry of Bolivian tin porphyry systems suggest a two-stage magmatic evolution. –Abstracts volume of the Mineral Deposits Studies Group Annual Meeting: 2 p.; Univ. Greenwich, UK.
Dietrich, A., Lehmann, B., Wallianos, A. (1998): Melt inclusion and bulk geochemistry of Bolivian tin porphyries imply a two-stage magmatic evolution. – Abstracts volume of the Geological Society of London Annual Meeting GEOSCIENCE ’98: 145; Keele University, UK.
Dietrich, A., Lehmann, B., Wallianos, A. (1998): The Bolivian tin porphyries of Llallagua, Chorolque and Cerro Rico: Melt inclusion and bulk rock geochemistry suggest mixing as part of the magmatic evolution. – Memorias XIII Congreso Geológico Boliviano: 607-608; Potosi, Bolivia.
Dietrich, A., Lehmann, B., Wallianos, A., Traxel, K. (1997): The Lower Miocene tin porphyry system of Llallagua, Bolivia: Bulk rock and melt inclusion geochemistry. – In: Papunen, H. (ed.) Mineral Deposits: Research and Exploration – Where do they meet ?: 625-628, Proc. 4th Biennial SGA Meeting Turku; Rotterdam (Balkema).
Poster presentations
Dietrich, A., Nelson, Eric P., Gutierrez, R., Layer, Paul W., 2005, The Huevos Verdes low sulfidation Ag-Au vein system, San Jose district, Deseado Massif, Patagonia, Argentina: Geological setting and controls on ore formation of a new mining enterprise, Abstract, Geological Society of Nevada, Windows to the World meeting, Reno, May 2005.
Dietrich, E.P. Nelson, P.W., Layer, 2005, High to low sulfidation style, epithermal precious metal mineralization associated with caldera-setting magmatic phases, Selene mining district, Apurimac, Perú, Gordon Conference on Inorganic Geochemistry – Metals in Ore-Forming Systems: Sources, Transport, Deposition, July 31-August 5, 2005, Proctor Academy, Andover, NH.
Other publications
Dietrich, A. (1999): Metallogenie, Geochemie und Schmelzeinschluß-Untersuchungen von tin porphyry und copper porphyry Lagerstätten der zentralen Anden (Bolivien, Chile). – Ph.D. thesis, TU Clausthal, Germany, Clausthaler Geowissenschaftliche Dissertationen 57: 198 p.
Dietrich Consulting E.I.R.L. 