Multidisciplinary approach to metallogenic models and types of primary gold concentration in the Cretaceous arc terranes of the Dominican Republic

Abstract

Multidisciplinary research carried out on primary gold ores in the evolving Cretaceous island arc terranes of the Dominican Republic has shown the existence of three groups of deposits and occurrences. The first comprises the Lower Cretaceous ores, including the giant Pueblo Viejo deposit and several uneconomic showings with traces of Au-Ag in the El Valle area west of Miches; comparison of the acid-sulphate hydro-thermal system of Pueblo Viejo with the disseminated, one-stage system of the El Valle region accounts for the fundamental differences in gold tonnages and grades between the two districts. The Upper Cretaceous barite-polymetallic (Cu-Zn)-Au-Ag epithermal ores in the northwest Dominican Republic and Haiti form the second group; Cu-Mo anomalies in oxidation zones are consistent with the observed presence of Cu-Mo porphyries at depth. The third group is formed by Upper Cretaceous-Tertiary metasediment-hosted, metamorphic quartz-sulphide, granitic vein swarms of the Miches area. These rocks are the probable source for the Miches lateritic/alluvial gold, which has been reworked during erosion and lateritization. Leaching tests have demonstrated the viability of routes other than cyanidation for gossanous gold-enriched samples from EI Valle and Restauración (northwest Dominican Republic). The results of a thiocyanate leach test appear to be the most promising on comparison with those obtained from tests with thiourea and ammoniacal thiosulphate.

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References

Amarante

J. A.

, Jimenez

and Lewis

J. F

. Geology, hydrother-mal alteration and geochemistry of epithermal Au—Ag mineralization in the Restauración area, Dominican Republic. Trans. 11th Caribbean geological conference, Barbados 1986, 1989, 26, 1–15.

Barbosa Filho

. Thiocyanate leaching of gold. Ph.D. thesis, Imperial College, University of London, 1991.

Barrer

R. M

. Hydrothermal chemistry of zeolites (Academic Press, 1982), 360 p.

Batchelor

R. A.

and Bowden

. Petrogenetic interpretation of granitoid rock series using multicationic parameters. Chem. GeoL, 48, 1985, 43–55.

Battle Mountain (Dominican Republic) Inc.: Dominguez H., Monster C. and Padilla R. comps. Reporte Annual Proyecto de Exploracion Minera Concession ‘Loma Larga', 1990, 11 p.

Berezowski

R. M.

and Sefton

V. B

. Paper presented at 108th AIME Annual meeting, New Orleans, U.S.A., 1979.

Block-Bolten

and Torma

A. E

. Metall., 7, 1986, 687–9.

Bourdon

. La Cordillere Oriental Dominicaine (Hispaniola, Grandes Antilles): un arc insulaire cretace polystructure. These troisieme cycle, Universite Pierre et Maire Curie, Paris, 1985.

Bowin

. Geology of the central Dominican Republic (A case history of part of an island arc). Mem. geol. Soc. Am., 98, 1966, 11–84.

10.

Bowles

J. F. W.

., Alluvial gold, platinum, osmium—irid-ium, copper—zinc and copper—tin alloys from Sumatra—their composition and genesis. Trans. Instn Min. Metall. (Sect. B: AppL earth sci.), 93, 1984, B23–30.

11.

Bowles

J. F. W

. Mechanical and chemical modification of allu-vial gold. Bull. Proc. Australas. Inst. Min. Metall., 293, no. 3 1988, 9–11.

12.

Box

G. E. P.

, Hunter

W. G.

and Hunter

J. S.

Statistics for exper-

imenters: an introduction to design, data analysis, and model building (New York: Wiley, 1978).

13.

Bureau of Mines. Cost estimation system handbook 2, mineral pro-cessing (Washington D.C.: U.S. Bureau of Mines, 1984).

14.

Cheilletz

. Etude geologique et metallogenique des indices a cuivre et molybdene de type porphyre cuprifere de la zone de Vert de Gris—Jean Rabel, Presqu'ile de Nord-Ouest, Haiti. Ph.D. thesis, University of Nancy, France, 1976.

15.

Cheilletz

. Personal communication, 1993.

16.

Claure

M. Z

. Exploracion—evaluation minera en Miches. Informe de progreso a Noviembre 1982. PNUD Projecto DOM/81/006, 1982, 26 p.

17.

De la Fuente

L. R.

, Fernandez

J. B.

and Kulstad

. Informe exploracion geologico—geoquimica de los sectores El Rancho, El Valle y Miches. Proyecto DOM-OEA Cordillera Oriental (Santo Domingo), 1990.

18.

Dominguez

H. S

. Geology, hydrothermal alteration and mineralization of the El Recodo porphyry copper prospect, southeastern Cordillera Central, Dominican Republic. M.S. thesis, George Washington University, Washington, D.C., 1987.

19.

Donnelly

T. W.

and Rogers

J. J. W

. The distribution of igneous rock suites throughout the Caribbean. Geol. Mijnbouz v, 57, 1978, 151–62.

20.

Donnelly

T. W.

and Rogers

J. J. W

. Igneous series in island arcs: the northeastern Caribbean compared with worldwide island arc assemblages. Bull. Volc., 43, 2, 1980, 347–82.

21.

Fleming

C. A

. A process for the simultaneous recovery of gold and uranium from South African ores, Gold 100. In Proc. int. conf. gold, vol. 2: extractive metallurgy of gold (SAIMM: Johannesburg, 1986), 301–19.

22.

Flett

D. S.

, Derry

and Wilson

J. C

. Chemical study of thio-sulphate leaching of silver sulphide. Trans. Instn Min. MetalL (Sect. C: Mineral Process. Extr. Metall.), 92, 1983, 216–23.

23.

Garrels

R. M.

and Christ

L. C

. Solutions, minerals and equilibria (New York: Harper and Row, 1965).

24.

Groen

J. C.

, Craig

J. R.

and Rimstidt

J. D

. Gold-rich rim for-mation on electrum grains in placers. Can. Miner., 28, 1990, 207–28.

25.

Gottardi

and Galli

. Natural zeolites (Springer Verlag, 1985), 490 p.

26.

Hernandez

J.B

. Geologia preliminar del area ‘El Valle’, Provincia El Seybo, Republica Dominicana. Trans. 9th Caribbean geological conference, Santo Domingo 1980, vol. 2, 675–80.

27.

Jimenez

G. J.

and Lewis

J. F

. Petrologia del area de Restauración, Republica Dominicana. In Trans. 10th Caribbean geological conference, Cartagena, Colombia, 1983 (1989) 445�53.

28.

Kakowski

J. A

. Izv. Akad. Nauk SSR, 7, 1957, 29–34.

29.

Kerley

B. J. U.S

. Patent 4269622, 1981.

30.

Kerley

B. J. U.S

. Patent 4369061, 1981.

31.

Kesler

S. E.

. Geology and geochemistry of sulphide miner-alization underlying the Pueblo Viejo gold—silver oxide deposit, Dominican Republic. Econ. Geol., 76, 1981, 1096–1117.

32.

Kesler

S. E.

. Geology and geochemistry of the early Cretaceous Los Ranchos Formation, central Dominican Republic. In Mann P., Draper G. and Lewis J. F. Geologic and tectonic development of the North America—Caribbean plate boundary in Hispaniola. Spec. Pap. Geol Soc. Amer., 1990.

33.

Irvine

T. N.

and Baragar

W. R. A

. A guide to the chemical clas-sification of the common volcanic rocks. Can. J. Earth Sci., 8, 1971, 523–48.

34.

Lajunen

L. H.

, Klemetti

and Anttila

Oulu Kem. Lait. Rapport 10, 1983, 34.

35.

Le Bas

M. J.

. A chemical classification of volcanic rocks based on the total alkali-silica diagram. J. Petrol., 27, 1986, 745–50.

36.

Lebron

M. C

. Petrochemistry and tectonic significance of Late Cretaceous, calc-alkaline volcanic rocks, Cordillera Oriental, Dominican Republic. M.S. thesis, University of Florida, 1989.

37.

Lewis

J. F.

. Lithology and stratigraphy of Upper Cretaceous volcanic and volcaniclastic rocks of the Tireo Group, Dominican Republic and correlations with the Massif du Nord in Haiti. Reference 32.

38.

Liddell

D. M

. Handbook of non-ferrous metallurgy (New York: McGraw Hill, 1945).

39.

Louca

. Metallogenesis of base metals and gold in northern Haiti. UNRFNRE Report 23, 1985, 17 p.

40.

Louca

. Precious and base metal exploration in northern Haiti: geology, exploration and mineral resources of Camp Coq Exploration Zone E. UNRFNRE Report 26, 1987, 31 p.

41.

Mann

, Draper

and Lewis

J. F.

An overview of the geo-logic and tectonic development of Hispaniola. Reference 32.

42.

Muntean

J. L.

. Evolution of the Monte Negro acid sulfate Au—Ag deposit, Pueblo Viejo, Dominican Republic: important fac-tors in grade development. Econ. GeoL, 85, 1990, 1738–85.

43.

Rosario Dominicana

S.A.

: Amarante

J. F.

and Garcia

J. M

. comps. Proyecto de exploracion Restauración. Estado Actual (Agosto 1990), 41 p.

44.

Russell

and Kesler

S. E.

Geology of the maar diatreme complex hosting precious metal mineralization at Pueblo Viejo, Dominincan Republic. Reference 32.

45.

Shafer

R. E

. Report on Miches, Villa Altagracia and Moncion alluvial gold mining areas. UNDP project DOM/81/006, 1983, 35 p.

46.

Schmid

. Descriptive nomenclature and classification of pyro-clastic deposits and fragments: recommendations of the IUGS Subcommission on the Systematics of Igneous Rocks. Geology, 9, 1981, 41–3.

47.

Smith

R. M.

and Martell

A. E.

Critical stability constants (New York: Plenum, 1974).

48.

Tozawa

, Umetsu

and Sato

in Yannopoulos

J. C.

and Agarwal

J. C.

eds The extractive metallurgy of copper, vol. 2 (New York: The Metallurgical Society of AIME, 1976), 706–21.

49.

Tyurin

N. G.

and Kakowski

J. A

. Izv. Buz. Tsv. Metall., 2, 1960, 6–13.

50.

UNDP (United Nation Development Programme) Proyecto D0M/78/004: Informacion de Inventario minero preliminar Miches, 1982.

51.

Proyecto

UNDP

DOM/81/006: Exploracion minera en areas selectas y apoyo al laboratorio—Republica Dominicana. Conclu-siones y recomendaciones del proyecto, 1985.

52.

Vennemann

T. W.

. Stable evidence for magmatic fluids in the Pueblo Viejo epithermal acid sulfate Au—Ag deposit, Dominican Republic. Econ Geol., 88, 1993, 55–71.

53.

Vogel

A. I

. A textbook of quantitative inorganic analysis, third edn (London: Longman, 1961), 264–5, 271–2.

54.

Yatsimirski

K. B.

and Astasheva

A. A

. The use of thiourea solu-tions in volumetric analysis (thiocarbamidometery). Zh. anal. Khim. USSR, 11, 1956, 465–6.