Abstract
The Dominga district in northern Chile (2082 Mt at 23.3 % Fe, 0.07 % Cu) shows a spatial and genetic affinity among distinctive structural elements and Fe–Cu-rich paragenetic mineral assemblages. Deep seated, NE-to-E striking structural elements form a right-lateral duplex-like structural system (early structural system, ESS) that cuts a regionally extensive alteration (stage I) zone. The EES system served as a locus and as path for the emplacement of biotite–magnetite alteration/mineralization (stage IIa) as veins and Fe-bearing layers following altered volcano sedimentary strata. NW-striking actinolite–magnetite hydrothermal breccias, coeval with and part of the ESS, include apatite (stage IIb) crystallized at 127 ± 15 Ma (U–Pb, 2σ). The ESS was also the locus of subsequent alteration/mineralization represented by K-feldspar, epidote, and albite (stage IIIa) and Fe–Cu-rich (vermiculite–anhydrite–chalcopyrite, stage IIIb) mineral associations. Shallowly developed, NNE-striking, left-lateral structural elements defining the El Tofo Structural System (ETSS)—probably part of the Atacama Fault System—clearly crosscut the ESS. Minerals associated with alteration/mineralization stage IIIb also occur as veins and as part of hydrothermal breccias of the ETSS, marking the transition from the ESS to ETSS. Molybdenite associated with alteration/mineralization stage IIIb yielded a Re–Os age of 127.1 ± 0.7 Ma (2σ). Both the ESS and ETSS were cut by left-lateral, NW- to E-striking shallowly developed structural elements (Intermediate Structural System, ISS) on which a hematite–calcite assemblage (stage IV) occurs mostly as infill material of veins and fault veins. The ISS is cut by N-striking, left-lateral, and shallowly developed structural elements (Late Structural System, LSS) showing no evidence of alteration/mineralization. Estimated strain and stress fields indicate an overall NW-trending shortening/compression and NE-trending stretching/tension strike-slip regime probably due to oblique subduction during the Mesozoic. However, the orientations of the stress and strain fields calculated for each structural system suggest a back-and-forth rotation pattern during transition from one structural system to the other—as they change between transtension and transpression—and between alteration/mineralization stages.
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References
Angelier J (1994) Fault slip analysis and paleostress reconstruction. In: Hancock P (ed) Continental deformation. Pergamon Press, UK, pp. 53–100
Arévalo C (1999) The coastal Cordillera-Precordillera boundary in the Copiapó area, northern Chile and the structural setting of the Candelaria Cu-Au ore deposit. Dissertation, Kingston University
Arévalo C, Grocott J, Martin W, Pringle M, Taylor G (2006) Structural setting of the Candelaria Fe oxide Cu-Au deposit, Chilean Andes (27°30’S). Econ Geol 101:819–841
Arriagada C, Roperch P, Mpodozis C, Fernandez R (2006) Paleomagnetism and tectonics of the southern Atacama Desert (25-28 degrees S), northern Chile. Tectonics 25(4):TC4001
Beck M (1998) On the mechanism of crustal block rotation in the Central Andes. Tectonophysics 299:75–92
Benavides J, Kyser T, Clark A, Oates C, Zamora R, Tarnovschi R, Castillo B (2007) The Mantoverde iron oxide-copper-gold district, III Región, Chile: the role of regionally derived, nonmagmatic fluids in chalcopyrite mineralization. Econ Geol 102:415–440
Bonson C, Grocott J, Rankin A, (1996) A structural model for the development of Fe-Cu mineralization within the Atacama Fault System, (25°00’S-27°15’S), Northern Chile. Third ISAG, St. Malo, France: 671–674
Bookstrom A (1977) The magnetite deposits of El Romeral, Chile. Econ Geol 72:1101–1130
Brown M, Diaz F, Grocott J (1993) Displacement history of the Atacama fault system 25°-27°S, northern Chile. Geol Soc Am Bull 105:1165–1174
Caine J, Evans J, Forster C (1996) Fault zone architecture and permeability structure. Geology 24:1125–1128
Cembrano J, Garrido I, Marquardt M (2009) Tectonic setting of IOCG deposits in the Central Andes: Strike-slip-dominated deformation. XII Congreso Geológico Chileno, Santiago: S9_043
Coira B, Davidson J, Mpodozis C, Ramos V (1982) Tectonic and magmatic evolution of the Andes of northern Argentina and Chile. Earth-Sci Rev 18:303–332
Correa A (2000) Geología del yacimiento Fe-Cu Teresa del Colmo, Región de Antofagasta, Chile. 9th Congreso Geológico Chileno v2: 102–106
Cox S, Knackstedt M, Braun J (2001) Principles of structural control on permeability and fluid flow in hydrothermal systems. Rev Econ Geol 14:1–24
Creixell C, Arévalo C (2009) Geología del Cuadrángulo El Tofo, Región de Coquimbo. SERNAGEOMIN, Gobierno Regional de Coquimbo, mapa a escala 1:50.000. Santiago
Creixell C, Arévalo C, Fanning M (2009) Geochronology of the Cretaceous magmatism from the Coastal Cordillera of north-central Chile (29°15’to 29°30’S): metallogenic implications. XII Congreso Geológico Chileno, Santiago
Doblas M (1998) Slickenside kinematic indicators. Tectonophysics 295:187–197
Espinoza S (1984) Le rôle du Crétacé inférieur dans la métallogénèse de la ceinture ferrifère d’Atacama-Coquimbo, Chili. Dissertation, Université Pierre et Marie Curie, Paris
Espinoza S (1990) The Atacama-Coquimbo ferriferous belt, northern Chile. In: Fontboté L, Amstutz G, Cardozo M, Cedillo E, Frutos J (eds) Stratabound ore deposits in the Andes. Springer –Verlag, Berlin, pp. 353–364
Federico L, Crispini L, Capponi G (2010) Fault-slip analysis and transpressional tectonics: a study of Paleozoic structures in northern Victoria land, Antarctica. J Struct Geol 32:667–684
Forsythe R, Chisholm L (1994) Paleomagnetic and structural constrains on the rotation in the northern Chilean coast ranges. J S Am Earth Sci 7:279–295
Geijer P (1931) The iron ores of the Kiruna type. Sveriges Geologiska Undersökning C367, 39 p
Gelcich S, Davis D, Spooner T (2005) Testing the apatite-magnetite geochronometer: U-Pb and 40Ar/39Ar geochronology of plutonic rocks, massive magnetite-apatite tabular bodies, and IOCG mineralization in northern Chile. Geochim Cosmochim Acta 69(13):3367–3384
Griffin W, Powell W, Pearson N, O'Reilly S (2008) GLITTER: data reduction software for laser ablation ICP-MS. In: Sylvester P. (ed), Laser Ablation–ICP–MS in the Earth Sciences. Mineralogical Association of Canada Short Course Series Volume 40 (Appendix 2): 204–207
Grocott J, Taylor G (2002) Magmatic arc fault system, deformation partitioning and emplacement of granitic complexes in the coastal cordillera, north Chilean Andes (25°30’S to 27°00’S). J Geol Soc Lond 159:425–442
Holdsworth R, van Diggelen E, Spiers C, de Bresser J, Walker R, Bowen L (2011) Fault rocks from the SAFOD core samples: implications for weakening at shallow depths along the San Andreas fault, California. J Struct Geol 33:132–144
Marrett R, Allmendinger RW (1990) Kinematic analysis of fault-slip data. Journal of Structural Geology 12: 973–986. Software available at http://www.geo.cornell.edu/geology/faculty/RWA/ programs/faultkin.html
Marschik R, Fontboté L (2001) The Candelaria-Punta del Cobre iron oxide Cu-Au (−Zn-Ag) deposits, Chile. Econ Geol 96:179–1826
Marschik R, Singer BS, Munizaga F, Tassinari C, Moritz R, Fontboté L (1997) Age of Cu (−Fe)-Au mineralization and thermal evolution of the Punta del Cobre district, Chile. Mineral Deposita 32:531–546
Marschik R, Leveille RA, Martin W (2000) La Candelaria and the Punta del Cobre district, Chile: early cretaceous iron oxide Cu-Au(−Zn-Ag) mineralization. In: Porter TM (ed) Hydrothermal iron-oxide copper-gold & related deposits: a global perspective. Australian Mineral Foundation, Adelaide, pp. 163–175
Mathur RD, Marschik R, Ruiz J, Munizaga F, Martin W (2002) Age of mineralization of the Candelaria Iron oxide Cu-Au deposit, and the origin of the Chilean iron belt based on Re-Os isotopes. Econ Geol 97:59–71
Ménard J (1986) Un modèle métasomatique pour les gisements de la Ceinture de fer du Chili. Académie des Sciences [Paris] Comptes Rendus des Séances.II 302: 775–778
Mpodozis C, Ramos VA (1990) The Andes of Chile and Argentina. In: Ericksen GE, Pinochet MTC, Reinemund JA (eds) Geology of the Andes and its relation to hydrocarbon and mineral resources. Circum-Pacific Council for Energy and Mineral Resources, Houston, Texas, pp. 59–90
Nyström JO, Henríquez F (1994) Magmatic features of iron ores of the Kiruna type in Chile and Sweden: ore textures and magnetite geochemistry. Econ Geol 89:820–839
Osterman C (1997) Mineralogical notes on the Productora project, Region III, Chile. Unpublished report, General Minerals Corporation, May 1997, 8 pages
Otsubo M, Yamaji A (2006) Improved resolution of the multiple inverse method by eliminating erroneous solutions. Comput Geosci 32:1221–1227
Oyarzún J, Frutos J (1984) Tectonic and petrological frame of the cretaceous iron deposits of North Chile. Mining Geology 34:21–31
Park CF Jr (1972) The iron ore deposits of the Pacific basin. Econ Geol 67:339–349
Passchier CW, Trouw RA (2005) Microtectonics. Springer-Verlag, Berlin-Heilderberg, 366 pp
Pearce NJG, Perkins WT, Westgate JA, Gorton MP, Jackson SE, Neal CR, Chenery SP (1997) A compilation of new and published major and trace element data for NIST SRM 610 and NIST SRM 612 glass reference materials. Geostandard Newslett 21:115–144
Petit J (1987) Criteria for the sense of movement on fault surfaces in the brittle rocks. J Struct Geol 9:597–608
Ray GE, Dick LA (2002) The Productora prospect in North-Central Chile: an example of an intrusion related, Candelaria type Fe-Cu-Au hydrothermal system. In: Porter TM (ed) Hydrotermal Iron Oxide Copper-Gold & Related Deposits: a global perspective, vol 2. PGC Publishing, Adelaide, Australia, pp. 131–151
Ritz J (1994) Determining the slip vector by graphical construction: use of a simplified representation of the stress tensor. J Struct Geol 16(5):737–741
Rojas C, Beck M, Burmester R, Cembrano J, Hervé F (1994) Paleomagnetism of the mid-Tertiary Ayacara Formation, southern Chile: counterclockwise rotation in a dextral shear zone. J S Am Earth Sci 7:45–56
Roperch P, Sempere T, Macedo O, Arriagada C, Fornari M, Tapia C, Garcia M, Laj C (2006) Counterclockwise rotation of late Eocene-Oligocene fore-arc deposits in southern Peru and its significance for oroclinal bending in the Central Andes. Tectonics 25:TC3010
Ruiz C, Peebles F (1988) Geología, distribución y génesis de los yacimientos metalíferos chilenos. Editorial Universitaria, Santiago, 334 pp
Ruiz C, Aguirre L, Corvalán J, Klohn C, Klohn E, Levi B (1965) Geología y yacimientos metalíferos de Chile: Instituto de Investigaciones Geológicas [Chile], 386 p
Scheuber E, Andriessen P (1990) The kinematic and geodynamic significance of the Atacama fault zone, northern Chile. J Struct Geol 12:243–250
Scheuber E, González G (1999) Tectonics of the Jurassic-Early Cretaceous arc of the north Chilean Coastal Cordillera (22°-26°S): a story of crustal deformation along a convergent plate boundary. Tectonics 18:895–910
Scholz C (2002) The Mechanics of Earthquakes and Faulting. Cambridge Press, second edition, Cambridge, UK, 470 pp
Selby D, Creaser R (2001) Re-Os geochronology and systematics in molybdenite from the Endako porphyry molybdenum deposit, British Columbia, Canada. Econ Geol 96:197–204
Sibson RH (1987) Earthquake rupturing as a mineralizing agent in hydrothermal systems. Geology 15:701–704
Sillitoe RH (2003) Iron oxide-copper gold deposits: an Andean view. Mineral Deposita 38:787–812
Sippel J, Scheck-Wenderoth M, Reicherter K, Mazur S (2009) Paleostress states at the south-western margin of the central European Basin system—application of fault slip analysis to unravel polyphase deformation pattern. Tectonophysics 470:129–146
Sperner B, Zweigel P (2010) A plea for more caution in fault-slip analysis. Tectonophysics 482:29–41
Taylor G, Grocott J, Pope A, Randall D (1998) Mesozoic faults systems, deformation and fault block rotation in the Andean forearc: a crustal-scale strike-slip duplex of the coastal cordillera of northern Chile. Tectonophysics 299:93–109
Taylor G, Grocott J, Dashwood B, Gipson M, Arevalo C (2007) Implications for crustal rotation and tectonic evolution in the Central Andes fore arc: new paleomagnetic results from the Copiapó region of northern Chile, 26°-28°S. Journal of Geophysical Research-Solid Earth 112:B01102
Thomson SN, Gehrels GE, Ruiz J, Buchwaldt R (2012) Routine low-damage U-Pb dating of apatite using laser ablation-multicollector-ICPMS. Geochem Geophys Geosyst 13:Q0AA21. doi:10.1029/2011GC003928
Ullrich TD, Clark AH (1999) The Candelaria copper-gold deposit, region III, Chile: paragenesis, geochronology and fluid composition. In: Stanley CJ et al. (eds) Mineral deposits: processes to processing. Balkema, Rotterdam, pp. 201–204
Veloso E, Anma R, Yamaji A (2009) Heterogeneous paleostress regimes recorded on the Taitao Ophiolite (Southern Chile), implications for ophiolite emplacement and effects of the subduction of the Chile ridge system. Andean Geol 36(1):3–16
Veloso E, Neira S, Siña A, Vivanco M, Cembrano J, Heuser G and Garrido I (2015a) Etapas de alteración/mineralización en el depósito de Dominga (Fe-Cu), Región de Coquimbo. XIV Congreso Geológico Chileno, La Serena, Chile.
Veloso E, Gomila R, Cembrano J, González R, Jensen E, Arancibia G (2015b) Stress fields recorded on large-scale strike-slip systems: effects on the tectonic evolution of crustal slivers during oblique subduction. Tectonophysics 664:244–255
Vila T, Lindsay N, Zamora R (1996) Geology of the Manto Verde copper deposit, northern Chile: a specularite-rich, hydrothermal-tectonic breccia related to the Atacama fault zone. Society of Economic Geology Special Publication 5:157–170
Vivallo W (2009) Yacimientos de óxidos de Hierro-Cobre-Oro en Chile. XII Congreso Geológico Chileno: s11_060
Vivallo W, Henriquez F, Espinoza S (1995) Metasomatismo y alteración hidrotermal en el distrito ferrífero Cerro Negro Norte, Copiapó, Chile. Revista Geológica de Chile 22:75–88
Vivallo W, Díaz A, Jorquera R (2008) Yacimientos metalíferos de la región de Atacama, Escala 1:500.000. Carta Geológica de Chile, Serie Recursos Minerales y Energéticos (n.27). SERNAGEOMIN, Santiago, 72 pp
Whitney D, Evans B (2010) Abbreviations for names of rock-forming minerals. Am Mineral 95:185–187
Yamaji A (2000) The multiple inverse method: a new technique to separate stresses from heterogeneous fault-slip data. J Struct Geol 22:441–452 Software available at http://www.kueps.kyoto-u.ac.jp/~web-bs/tsg/software/mim/
Acknowledgments
We would like to thank all personnel at Dominga for their valuable help during field campaigns. Special thanks to M. Vivanco for his comments and suggestions in the field that helped to unravel the complex tectono-metallogenic processes at Dominga. Also, we would like to thank Mr. M. Marquardt, Ms. P. Pérez-Flores and Ms. I. Santibañez for their help during mapping and to Mr. R. Gomila for his help during geochronology laboratory procedures. Comments made by Dr. B. Lehmann, Dr. T. Bissig, Dr. M. Barton, and an anonymous reviewer helped to improve the quality of the manuscript. This work was supported by a joint project venture between Andes Iron SpA and the Direction of Research and Science (DICTUC) of the Pontificia Universidad Católica de Chile, and it is a contribution to the Millennium Science Initiative (MSI) through Millennium Nucleus for Metal Tracing along Subduction grant NC130065.
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Veloso, E., Cembrano, J., Arancibia, G. et al. Tectono-metallogenetic evolution of the Fe–Cu deposit of Dominga, northern Chile. Miner Deposita 52, 595–620 (2017). https://doi.org/10.1007/s00126-016-0682-8
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DOI: https://doi.org/10.1007/s00126-016-0682-8