The importance of supersaturated silica deposition for base-metal Au-Ag mineralisation in western Turkey

In the Arapuçandere LS-IS epithermal deposit in western Turkey, either well crystallised euhedral quartz or milky amorphous silica occurrences are associated with the precious and base-metal mineralisation. This study has determined the relative importance of the processes precipitating both of these in relation to the deposition of the ore. Analysis by LA-ICPMS of euhedral quartz and amorphous silica show that the latter is associated with much higher metal concentrations and suggests that the process responsible is more important for deposition of ore in the deposit. Mineralisation at Kumarlar and Koru may be similar. Slow cooling precipitates euhedral quartz and some ore but flashing of hydrothermal fluids causes drastic decreases in both T and P, sufficient to quantitatively deposit base metals and Au. In amorphous silica bands base metals reach concentrations of 1000?s of ppm compared with a few 10?s ppm in euhedral quartz; Au can reach over 1 ppm compared with a few 10?s ppb in quartz. The drastic pressure change from lithostatic to sub-hydrostatic could reasonably be caused by opening of faults and fractures by seismic events.

The importance of supersaturated silica deposition for base-metal Au-Ag mineralisation in western Turkey

In the Arapuçandere LS-IS epithermal deposit in western Turkey, either well crystallised euhedral quartz or milky amorphous silica occurrences are associated with the precious and base-metal mineralisation. This study has determined the relative importance of the processes precipitating both of these in relation to the deposition of the ore. Analysis by LA-ICPMS of euhedral quartz and amorphous silica show that the latter is associated with much higher metal concentrations and suggests that the process responsible is more important for deposition of ore in the deposit. Mineralisation at Kumarlar and Koru may be similar. Slow cooling precipitates euhedral quartz and some ore but flashing of hydrothermal fluids causes drastic decreases in both T and P, sufficient to quantitatively deposit base metals and Au. In amorphous silica bands base metals reach concentrations of 1000?s of ppm compared with a few 10?s ppm in euhedral quartz; Au can reach over 1 ppm compared with a few 10?s ppb in quartz. The drastic pressure change from lithostatic to sub-hydrostatic could reasonably be caused by opening of faults and fractures by seismic events.

Kaynakça

Adams SF (1920). A microscopic study of vein quartz. Econ Geol 15: 623–664.

Allan MM, Yardley BWD, Forbes LJ, Shmulovich KI, Banks DA, Shepherd TJ (2005). Validation of LA-ICP-MS fluid inclusion analysis with synthetic fluid inclusions. Am Mineral 90: 1767– 1775.

Altunkaynak S, Dilek Y (2006). Timing and nature of postcollisional volcanism in western Anatolia and geodynamic implications. Geological Society of America Special Paper 409: 321–351.

Arribas Jr A (1995). Characteristics of high-sulfidation epithermal deposits and their relation to magmatic fluid. In: Thompson JFH (Ed.) Magmas, Fluids and Ore Deposits: Mineral Assoc of Canada Short Course 23: 419–454.

Benning LG, Seward TM (1996). Hydrosulphide complexing of Au(1) in hydrothermal solutions from 150-400°C and 500- 1500 bar. Geochim Cosmochim Ac 60: 1849–1871.

Bozkaya G, Banks DA, Ozbas F, Wallington J (2014). Fluid processes in the Tesbihdere base-metal-Au deposit: implications for epithermal mineralization in the Biga Peninsula, NW Turkey. Cent Eur J Geosci 6: 148–169.

Bozkaya G, Banks DA (2015). Physico-chemical controls on ore deposition in the Arapucandere Pb-Zn-Cu deposit, Biga Peninsula, NW Turkey. Ore Geology Reviews 66: 65–88.

Cicek M, Oyman T, Ozgenc I, Akbulut M (2012). Fluid evolution of the Koru Pb-Zn deposit, Çanakkale (NW-Turkey), International Earth Science Colloquium on the Aegean Region, IESCA-2012 abstract book, page 158.

Dilek Y (2006). Collisional tectonics of the Mediterranean region: Causes and consequences. Geological Society of America Special paper 409: 1–13.

Dolejs D, Manning CE (2010). Thermodynamic model for mineral solubility in aqueous fluids: Theory, calibration and application to model fluid-flow systems. Geofluids 10: 20–40.

Dove PM, Craven CM (2005). Surface charge density on silica in alkali and alkaline earth chloride electrolyte solutions. Geochim Cosmochim Ac 69: 4963–4970.

Dong G, Morrison G, Jaireth S (1995). Quartz textures in epithermal veins, Queensland-classification, origin and implication. Econ Geol 90: 1841–1856.

Fournier RA, Potter (III) RW (1982). An equation correlating the solubility of quartz in water from 25°C to 900°C at pressures up to 10,000 bars. Geochim Cosmochim Ac 46: 1969–1973.

Guillong M, Meir DL, Allan MM, Heinrich CA, Yardley BWD (2008). SILLS: A Matlab based program for the reduction of Laser Ablation ICP-MS data of homogeneous materials and inclusions. Mineral Assoc of Canada Short Course 40: 328–333.

Hedenquist JW, Lowenstern JB (1994). The role of magmas in the formation of hydrothermal ore deposits. Nature 370: 519–527.

Henley RW (1991). Epithermal gold deposits in volcanic terranes. In Foster RP, editor, Gold Metallogeny and Exploration. Glasgow, UK: Blackie, pp 133–164.

Henley RW, Berger BR (2000). Self-ordering and complexity in epizonal mineral deposits. Ann Rev Earth Pl Sc 28: 669–719.

Henley RW, Brown KL (1985). A practical guide to the chemistry of geothermal and epithermal systems. In Berger BR, Bethke PM, editors. Geology and Geochemistry of Epithermal Systems. Society of Economic Geology, Reviews in Economic Geology 2: 25–44.

Henley RW, Ellis AJ (1983). Geothermal systems ancient and modern: a geothermal review. Earth Sciences Review 19: 1–50.

Henley RW, McNabb A (1978). Magmatic vapour plumes and ground water interaction in porphyry copper emplacement. Econ Geol 73: 1–20.

Herrington RJ, Wilkinson JJ (1993). Colloidal gold and silica in mesothermal vein systems. Geology 21: 539–542.

Iler RK (1979). The Chemistry of Silica: Solubility, Polymerization, Colloid and Surface Properties, and Biochemistry. New York, NY, USA: Wiley, 24: 866 p.

Imer EU, Güleç N, Kuscu I, Fallick AE (2013). Genetic investigation and comparison of Kartaldag and Madendag epithermal gold deposits in Çanakkale, NW Turkey. Ore Geol Rev 53: 204–222.

Marinova IK, Titorenkova RH, Ganev VY (2013). Colloidal origin of the quartz-adularia millimetre-to-submillimetre-wide banding of bonanza electrum grades in the epithermal, low-sulphidsation, sedimentary rock hosted Au-Ag Khan Krum deposit, Bulgaria. CR Acad Bulg Sci 66: 1291–1298.

Migdisov AA, Williams-Jones AE (2013). A predictive model for metal transport of silver chloride by aqueous vapour in ore-forming magmatic-hydrothermal systems. Geochim Cosmochim Ac 104: 123–135.

Moncada D, Bodnar RJ (2012a). Gangue mineral textures and fluid inclusion characteristics of the Santa Margarita Vein in the Guanajuato Mining District, Mexico. Cent Eur J Geosci 4: 300– 309.

Moncada D, Mutchler S, Nieto A, Reynolds TJ, Rimstidt JD, Bodnar RJ (2012b). Mineral textures and fluid inclusion petrography of the epithermal Ag-Au deposits at Guanajuato, Mexico: application to exploration. J Geochem Explor 114: 20–35.

Muller A, Wiedenbeck M, Van Den Kerkhof AM, Kronz A, Simon K (2003). Trace elements in quartz – a combined electron microprobe, secondary ion mass spectrometry, laser-ablation ICP- MS, and cathodoluminescence study. Eur J Mineral 15: 747–763.

Oyman T, Minareci F, Piskin O (2003). Efemcukuru B-rich epithermal gold deposit (Izmir, Turkey). Ore Geol Rev 23: 35–53.

Orgun Y, Gultekin AH, Onal A (2005). Geology, mineralogy and fluid inclusion data from the Arapucan Pb-Zn-Cu-Ag deposit, Canakkale, Turkey. J Asian Earth Sci 25: 629–642.

Richards JP (2011). Magmatic to hydrothermal metal fluxes in convergent and collided margins. Ore Geol Rev 40: 1–26.

Rusk BG, Reed MH, Dilles JH, Kent AJR (2006). Intensity of quartz cathodoluminescence and trace-elements content in quartz from the porphyry copper deposit at Butte, Montana. Am Mineral 91: 1300–1312.

Rusk BG, Lowers HA, Reed MH (2008). Trace elements in hydrothermal quartz: Relationships to cathodoluminescent textures and insight into vein formation. Geology 36: 547–550.

Sander MV, Black JE (1988). Crystallization and recrystallization of growth-zoned quartz crystals from epithermal systems- implications for fluid inclusion studies. Econ Geol 83: 1052– 1060.

Saunders JA (1990). Colloidal transport of gold and silica in epithermal precious-metal system: evidence from the Sleeper deposit, Nevada. Geology 18: 757–760.

Saunders JA (1994). Silica and gold textures in bonanza ores of the Sleeper deposit, Humbolt County, Nevada: evidence for colloids and implications for epithermal ore-forming processes. Econ Geol 89: 628–638.

Seward TM (1976). The stability of chloride complexes of silver in hydrothermal solutions up to 350°C. Geochim Cosmochim Ac 40: 1329–1341.

Seward TM (1989). The hydrothermal chemistry of gold and its implication for ore formation: boiling and conductive cooling as examples. Economic Geology Monographs 6: 398–404.

Sibson RH, Robert F, Poulsen KH (1988). High-angle reverse faults, fluid-pressure cycling, and mesothermal gold-quartz deposits. Geology 16: 551–555.

Tanner D, Henley RW, Mavrogenes JA, Holden P (2013). Combining in situ isotopic, trace element and textural analyses of quartz from four magmatic-hydrothermal ore deposits. Contrib Miner Petr 166: 1119–1142.

Tufan EA (1993). Geologic and petrographic features of Karaaydın (Yenice-Canakkale) and the study of Pb–Zn mineralizations: Unpublished PhD Thesis, Selçuk University, 158p.

Weatherley DK, Henley RW (2013). Flash vaporization during earthquakes evidenced by gold deposits. Nature Geoscience 6: 294–298.

Westcott SL, Oldenburg SJ, Lee TR, Halas NJ (1998). Formation and adsorption of clusters of gold nanoparticles onto functionalized silica nanoparticle surfaces. Langmuir 14: 5396–5401.

White NC, Hedenquist JW (1990). Epithermal environments and styles of mineralization; variations and their causes, and guidelines for exploration. J Geochem Explor 36: 445–474.

Wilkinson JJ, Johnson JD (1996). Pressure fluctuations, phase separation and gold precipitation during seismic fracture propagation. Geology 24: 395–398.

Yalcinkaya N (2010). Geological, mineralogical and geochemical investigation of the Koru (Lapseki-Canakkale) Pb-Zn-Ag deposit. Master thesis, 181 p., Çanakkale Onsekiz Mart University, unpublished.

Yiğit O (2012). A prospective sector in the Tethyan Metallogenic Belt: Geology and geochronology of mineral deposits in the Biga Peninsula, NW Turkey. Ore Geol Rev 46: 118–148.

Yilmaz H, Sönmez FN, Akay E, Sener AK, Tufan ST (2013). Low- sulfidation epithermal Au-Ag mineralization in the Sindirgi District, Balikesir Province, Turkey. Turkish J Earth Sci 22: 485–522.

Yilmaz H, Oyman T, Sönmez FN, Arehart GB, Billor Z (2010). Intermediate sulfidation epithermal gold-base metal deposits in Tertiary subaeria volcanic rocks, Sahinli/Tespih Dere (Lapseki/Western Turkey). Ore Geol Rev 37: 236–258.

Kaynak Göster

Bibtex @ { tbtkearth143931, journal = {Turkish Journal of Earth Sciences}, issn = {1300-0985}, eissn = {1303-619X}, address = {}, publisher = {TÜBİTAK}, year = {2015}, volume = {24}, pages = {99 - 112}, doi = {10.3906/yer-1405-10}, title = {The importance of supersaturated silica deposition for base-metal Au-Ag mineralisation in western Turkey}, key = {cite}, author = {Bozkaya, Gülcan and Banks, David A.} }
APA Bozkaya, G , Banks, D . (2015). The importance of supersaturated silica deposition for base-metal Au-Ag mineralisation in western Turkey . Turkish Journal of Earth Sciences , 24 (2) , 99-112 . DOI: 10.3906/yer-1405-10
MLA Bozkaya, G , Banks, D . "The importance of supersaturated silica deposition for base-metal Au-Ag mineralisation in western Turkey" . Turkish Journal of Earth Sciences 24 (2015 ): 99-112 <https://dergipark.org.tr/tr/pub/tbtkearth/issue/12045/143931>
Chicago Bozkaya, G , Banks, D . "The importance of supersaturated silica deposition for base-metal Au-Ag mineralisation in western Turkey". Turkish Journal of Earth Sciences 24 (2015 ): 99-112
RIS TY - JOUR T1 - The importance of supersaturated silica deposition for base-metal Au-Ag mineralisation in western Turkey AU - Gülcan Bozkaya , David A. Banks Y1 - 2015 PY - 2015 N1 - doi: 10.3906/yer-1405-10 DO - 10.3906/yer-1405-10 T2 - Turkish Journal of Earth Sciences JF - Journal JO - JOR SP - 99 EP - 112 VL - 24 IS - 2 SN - 1300-0985-1303-619X M3 - doi: 10.3906/yer-1405-10 UR - https://doi.org/10.3906/yer-1405-10 Y2 - 2021 ER -
EndNote %0 Turkish Journal of Earth Sciences The importance of supersaturated silica deposition for base-metal Au-Ag mineralisation in western Turkey %A Gülcan Bozkaya , David A. Banks %T The importance of supersaturated silica deposition for base-metal Au-Ag mineralisation in western Turkey %D 2015 %J Turkish Journal of Earth Sciences %P 1300-0985-1303-619X %V 24 %N 2 %R doi: 10.3906/yer-1405-10 %U 10.3906/yer-1405-10
ISNAD Bozkaya, Gülcan , Banks, David A. . "The importance of supersaturated silica deposition for base-metal Au-Ag mineralisation in western Turkey". Turkish Journal of Earth Sciences 24 / 2 (Ağustos 2015): 99-112 . https://doi.org/10.3906/yer-1405-10
AMA Bozkaya G , Banks D . The importance of supersaturated silica deposition for base-metal Au-Ag mineralisation in western Turkey. Turkish Journal of Earth Sciences. 2015; 24(2): 99-112.
Vancouver Bozkaya G , Banks D . The importance of supersaturated silica deposition for base-metal Au-Ag mineralisation in western Turkey. Turkish Journal of Earth Sciences. 2015; 24(2): 99-112.
IEEE G. Bozkaya ve D. Banks , "The importance of supersaturated silica deposition for base-metal Au-Ag mineralisation in western Turkey", Turkish Journal of Earth Sciences, c. 24, sayı. 2, ss. 99-112, Ağu. 2015, doi:10.3906/yer-1405-10