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Portovelo Ecuador

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Journal Article
Journal: SEG Discovery
Published: 01 April 2002
SEG Discovery (2002) (49): 1–14.
...R. M. Spencer; J. L. Montenegro; A. Gaibor; E. P. Perez; G. Mantilla; F. Viera; C. E. Spencer The Portovelo-Zaruma mining camp is an unusual mining district in Ecuador, with historic gold production exceeding 4.5 Moz. The production has mostly come from an extensive set of base metal-rich veins...
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Journal Article
Journal: SEG Discovery
Published: 01 October 1992
SEG Discovery (1992) (11): 1–16.
... a porphyry system. Other similar “high level” breccia prospects occur about 6 km to the north at Pihili ; 10 km SE at Mirador ; and 20 km SE at La Tigrera , La Playa , and Pucara ; and further south at Cerro Pelado ( Fig. 2 ). The Portovelo-Zaruma district in southwestern Ecuador was discovered...
FIGURES
Journal Article
Journal: SEG Discovery
Published: 01 April 2002
SEG Discovery (2002) (49): 1–48.
..., E. P. Perez, G. Mantilla, F. Viera, C. E. Spencer IAMGOLD Ecuador S.A., Avenida El Tiempo N37-67 y El Comercio, Quito, Ecuador INTRODUCTION t The Portovelo-Zaruma mining camp is .c.J Quaternary deposits Blue schist, eclogites an unusual mining district in Ecuador, Intrusions with historic gold...
Journal Article
Journal: Economic Geology
Published: 01 September 2004
Economic Geology (2004) 99 (6): 1085–1106.
.... , 2002 , The Portovelo-Zaruma Mining Camp, SW Ecuador: Porphyry and epithermal environments : Society of Economic Geologists Newsletter , no. 49 , p. 1 , 8–14. Stoll , W.C. , 1962 , Notes on the mineral resources of Ecuador : Economic Geology , v. 57 , p. 799 – 808 . Sun , S-S...
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Journal Article
Journal: Economic Geology
Published: 01 November 2010
Economic Geology (2010) 105 (7): 1243–1270.
... a large geographic spread (~100 km), covering three main areas in southern-central Ecuador (Chaucha, Cañicapa, Portovelo; Fig. 1C ) where spatially associated porphyry-related mineralization is observed. Both intrusive centers and Saraguro Group volcanic rocks may integrate magmatic events of 5 to 15 m.y...
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Journal Article
Journal: SEG Discovery
Published: 01 October 1992
SEG Discovery (1992) (11): 1–28.
... Gold Mine, p. 322-323. M()6quera, D. F., 1951, Las Minas de Portovelo: Anales de la Universidad de CUenca, tome VII, tomo 4. Paladlnes, A., 1989, Aspectos basicos de metalogenia: Memorias 8 CUrso International de Metalogenia, Universidad Central de! Ecuador. PlllaJo, E. 1983, Geologia economica de...
Journal Article
Published: 11 January 2018
Journal of Environmental and Engineering Geophysics (2017) 22 (4): 315–324.
... , Application of electrical resistivity imaging (ERI) to a tailings dam project for artisanal and small-scale gold mining in Zaruma-Portovelo, Ecuador : Journal of Applied Geophysics , 113 , 103 – 113 . The mining activities in Zeida have left ten pits that are currently filled...
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Journal Article
Journal: GSA Bulletin
Published: 15 December 2022
GSA Bulletin (2023) 135 (7-8): 2141–2154.
... in Ecuador has been tentatively divided into three segments based on outcrop patterns and tectonic environment ( Fig. 2 ; Schütte et al., 2010 ). † [email protected] . 9 3 2022 19 8 2022 16 9 2022 The basement of the Western Cordillera in Ecuador is made up of Late...
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Journal Article
Published: 01 September 2020
Journal of Environmental and Engineering Geophysics (2020) 25 (3): 415–423.
...., 2015 , Application of electrical resistivity imaging (ERI) to a tailings dam project for artisanal and small-scale gold mining in Zaruma-Portovelo, Ecuador : Journal of Applied Geophysics , 113 , 103 – 113 . Both SRT and ERT showed that the thickness...
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Journal Article
Published: 01 April 2021
American Mineralogist (2021) 106 (4): 497–505.
... petrography using optical image analysis: Application to Zaruma-Portovelo deposit (Ecuador). Geosciences , 6 , 30 . Bither , T.A. , Bouchard , R.J. , Cloud , W.H. , Donohue , P.C. , and Siemons , W.J. ( 1968 ) Transition metal pyrite dichalcogenides. High-pressure synthesis...
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Journal Article
Journal: Economic Geology
Published: 01 December 2005
Economic Geology (2005) 100 (8): 1667–1674.
... and Nikol veins, Portovelo Zaruma deposit, Ecuador— R. Banda, I.V. Vikent’ev, and L.P. Nosik 1388 Vol. 238, No. 1–2, 2005 Nonequilibrium magma degassing: Results from modeling of the ca. 1340 A.D. eruption of Mono Craters, California— Helge M. Gonnermann and Michael Manga 1...
Journal Article
Journal: SEG Discovery
Published: 01 July 2004
SEG Discovery (2004) (58): 1–60.
... 1 Moz Portovelo-Zaruma mesothermal vein Resources (Machacala), Tumi Resources gold at 1 g/t Au. Newmont is aggres- gold camp. Aurelian Resources, (Tinka), Apex Silver, IRL (Corihuarmi), sively drilling its optioned Liam gold- another recent arrival in Ecuador, Andresmin (Winicocha, Huarangayoc...
Journal Article
Published: 30 August 2019
Geological Magazine (2020) 157 (2): 307–320.
...-Portovelo deposit (Ecuador) . Geosciences 6 , 30 . Bowell RJ ( 1992 ) Supergene gold mineralogy at Ashanti, Ghana: implications for the supergene behaviour of gold . Mineralogical Magazine 56 , 545 . Boyle RW ( 1969 ) Hydrothermal transport and deposition of gold...
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Journal Article
Journal: SEG Discovery
Published: 01 October 2003
SEG Discovery (2003) (55): 1–48.
... Tertiary gold-rich La K.R. McClay, advisor. Ph.D., H-R. Spatial and temporal relations Plata volcanic-hosted massive sul- Topaz and cryolite equilibria in phide (VHMS) deposit, Pichincha between evolving fault orientation province, Ecuador. David Tripodi, granitic systems: Implications for and mineral...
Series: AAPG Memoir
Published: 01 January 2003
DOI: 10.1306/M79877C37
EISBN: 9781629810546
...) are supplied by Pindell et al. (1988) . Romeral–Peltetec fault systems These important fault systems originate in southwestern Ecuador, where they are mapped as the Peltetec-(Girón)-Portovelo faults ( CODIGEM, 1993a , b ). They extend northward into central Colombia and, along their entire length...
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Journal Article
Journal: SEG Discovery
Published: 01 October 2002
SEG Discovery (2002) (51): 1–48.
... permitted the fund­ ing of 25 travel grants (a record number FIGURE 1. Group photo in the Portovelo-Zaruma mining district. in the history of the course) among the 43 Latin American geologists, mining engineers, chemists, and ecologists com­ mation, control, and prevention of acid Ecuador; W. Bonilla, BIRA...
Journal Article
Journal: SEG Discovery
Published: 01 January 2003
SEG Discovery (2003) (52): 1–56.
... have family have organized a memorial fund istry in Quito, Ecuador, and to speakers at improved the process by which new a SEG-sponsored symposium on new dis- within the SEG Foundation. Gifts received coveries in the Andes, presented at the XI will go into a restricted fund that will be used to support...
Series: Special Publications of the Society of Economic Geologists
Published: 01 January 2005
DOI: 10.5382/SP.11.19
EISBN: 9781629490359
... Abstract The Nambija gold district, southeastern Ecuador, consists of oxidized skarns developed mainly in volcaniclastic rocks of the Triassic Piuntza unit, which occurs as a 20-km-long, north-trending, contact-metamorphosed lens within the Jurassic Zamora batholith. High gold grades (10–30 g/t...
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Journal Article
Journal: SEG Discovery
Published: 01 April 2004
SEG Discovery (2004) (57): 1–44.
... the university in Canada or Lan Chile enroute to the Siddeley, where we had fun debating 22nd UNESCO-SEG Postgraduate Course some of the proposed models of forma- Cancun so this trip was down to us it in Metallogeny, held at the Universidad tion of this giant porphyry (oops! Central del Ecuador in Quito (June...
Series: Special Publications of the Society of Economic Geologists
Published: 01 January 2001
DOI: 10.5382/SP.08.10
EISBN: 9781629490328
... Zealand ( Christie and Brathwaite, 1986 ), Orcopampa, Peru ( Gibson et al., 1990 ), Faride, Chile ( Camus and Skewes, 1991 ), Portovelo, Ecuador ( van Thournout et al., 1996 ), and San Felipe Mex-icali, Mexico ( Ibarra-Serrano, 1997 ). APPENDIX Electron Probe Microanalyses (EPM) TABLE A1. Mean...
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