Partition of cadmium and manganese between coexisting sphalerite and galena from some Japanese epithermal deposits

Urabe, Tetsuro

doi:10.1007/bf00206170

Cited by 9 publications

(3 citation statements)

References 18 publications

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“…Correlations between manganese and coexisting sphalerite and galena have been reported in the literature (Mishra and Mookherjee, 1988;Urabe, 1977), as well as with sphalerite as an important host mineral for manganese (Cook et al, 2009). The lack of correlation between lead and zinc, and lead and manganese can be explained by the lead extraction from ore, while zinc exploitation was not reported from this mine.…”

Section: Soil Characteristicsmentioning

confidence: 69%

Metal (Al, Mn, Pb and Zn) soils extractable reagents for available fraction assessment: Comparison using plants, and dry and moist soils from the Braçal abandoned lead mine area, Portugal

Anjos¹,

Magalhães²,

Abreu³

2012

Journal of Geochemical Exploration

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Section: Soil Characteristicsmentioning

confidence: 69%

Metal (Al, Mn, Pb and Zn) soils extractable reagents for available fraction assessment: Comparison using plants, and dry and moist soils from the Braçal abandoned lead mine area, Portugal

Anjos¹,

Magalhães²,

Abreu³

2012

Journal of Geochemical Exploration

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“…According to the studies for sphalerite composition, the covalent elements are preferentially partitioned into sphalerite in order of Cd>Fe>Mn (Kubo et al, 1992) and Cd and Mn contents in sphalerite is commonly attribute to the chemical composition of oreforming solution (Urabe, 1977;Nakayama, 1986). These researches suggest the possible Mn and Cd fractionation into sphalerite alike the tetrahedrite-tennantite solid solution discussed above.…”

Section: Fractional Crystallizations Of Tetrahedrite-tennantite and Smentioning

confidence: 99%

Polymetallic and Au‐Ag Mineralizations at the Mutnovskoe Deposit in South Kamchatka, Russia

Takahashi¹,

Matsueda

Okrugin

et al. 2006

Resource Geology

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. The Mutnovskoe deposit located in the Porozhisto‐Asachinskaya metallogenic province of South Kamchatka, Russia, is a polymetallic vein and Au‐Ag quartz vein associated type of hydrothermal deposit. The Mutnovskoe deposit is located inside a paleo‐caldera structure at the center of the Mutnovsko‐Asachinskaya geothermal field of Pliocene ‐ Quaternary age, where active gold deposition is identified in hot spring precipitate. The Mutnovskoe deposit is subdivided into the north flank, the central flank and the south flank based on the vein distributions and mineral parageneses. The mineralized vein system is oriented N‐S hosted in diorite ‐ gabbroic diorite stock, volcanic rocks and sedimentary rocks of Miocene ‐ Pleistocene age. The mineralization stage I (polymetallic vein) mainly in the central and the south flanks is Zn‐Pb‐Cu‐Au‐Ag contained in sphalerite, galena and tetrahedrite‐tennantite group mineral. The stage II (Au‐Ag quartz vein) occurs in the north and the central flanks. The stage III (Mn‐sulfide and Mn‐Ca‐carbonate vein) occurs in the whole deposit area. Stage II is the typical Au‐Ag quartz‐adularia vein of low‐sulfidation type. Stage III is alabandite‐rhodochrosite‐quartz‐calcite vein. The K‐Ar ages are 1.3±0.1 Ma for stage I sericite in alteration zone, and 0.7±0.1 Ma for the stage II adularia in mineralized vein. Based on the fluid inclusion study, range of ore forming temperature of the Mutnovskoe deposit is 200 to 260d̀C (av. 230d̀C). Salinities of fluid inclusions indicate 2.2 to 5.7 wt% NaCl in sphalerite and 0.8 to 3.3 wt% NaCl in quartz for the stage I. Mineral paragenesis of the polymetallic vein (stage I) is characterized by a district zoning of tennantite and Cd‐rich sphalerite in the south flank and tetrahedrite and Mn‐rich sphalerite in the central flank, which is due to the fractional crystallizations of ore‐forming fluid. Depositional condition of the low sulfidation state is inferred for the Mutnovskoe deposit, where the polymetallic vein of the south flank is in relatively higher sulfidation state than the central flank.

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“…In sample 1101_5 cadmium (Cd) was also measured. Cd is known to incorporate into sphalerite (Fallon et al 2017, Urabe, 1977 and adsorb onto Fe(oxyhydr)oxides (Benjamin & Leckie 1981, Bruemmer et al 1988). Its presence along pore channels suggests that adsorption is the primary means of association here.…”

Section: Othermentioning

confidence: 99%

Inferences on the influences of age & porosity on oxidative weathering of seafloor massive sulfide deposits at the endeavour segment of the Juan de Fuca Ridge

Herrera

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Hydrothermal activity at mid-ocean ridge spreading centers occurs during the formation of new oceanic crust and is responsible for the accumulation of mineral deposits comprised mainly of inorganic metal sulfides that precipitate from mixtures of seawater and high-temperature, sulfide-rich, oxygen-poor vent fluid. These mineral aggregates are known as seafloor massive sulfide deposits and occupy unique biogeochemical niches that remain largely unexplored. Upon the cessation of hydrothermal activity, massive sulfide deposits undergo alteration via both biotically- and abiotically-mediated geochemical reactions. These processes are collectively described as oxidative weathering. While the observed textures of these deposits suggest significant variation in weathering rates, neither the causes of this variation nor the drivers that govern biogeochemical oxidation of massive sulfides are well-characterized. To begin to describe the mechanisms that dictate these processes, massive sulfide samples were collected from deposits along the Endeavour Segment of the Juan de Fuca Ridge. Coupled synchrotron-based X-ray Absorption Near Edge Spectroscopy (XANES) and X-Ray Fluorescence (XRF) microscopy were utilized to create comprehensive redox maps that allow for characterization of the localized redox environment and identification of weathering products. These techniques are a powerful and so far underutilized tool with which to examine the geochemical landscapes of seafloor massive sulfide deposits. Mineral identifications and spatial distributions were corroborated with optical microscopy and X-Ray Diffraction (XRD). The Juan de Fuca Ridge massive sulfide samples are composed of iron-sulfide phases, primarily pyrite (FeS2), with minor amounts of other metal-bearing sulfides, such as sphalerite ((Zn,Fe)S2) , wurtzite ((Zn,Fe)S2), and cubanite (CuFe2S3). The samples contain rinds comprised of oxides and (primarily iron-bearing) clays that occur along massive sulfide exteriors and within pore channels. Greater amounts of secondary oxides and clays are observed concurrent with increased porosity and internal pore distribution and are inferred to be products of weathering. This study contributes to current understanding of the mineralogy and composition of seafloor massive sulfide deposits and provides new insight into relationships between age, porosity, and oxidative weathering.

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Partition of cadmium and manganese between coexisting sphalerite and galena from some Japanese epithermal deposits

Cited by 9 publications

References 18 publications

Metal (Al, Mn, Pb and Zn) soils extractable reagents for available fraction assessment: Comparison using plants, and dry and moist soils from the Braçal abandoned lead mine area, Portugal

Metal (Al, Mn, Pb and Zn) soils extractable reagents for available fraction assessment: Comparison using plants, and dry and moist soils from the Braçal abandoned lead mine area, Portugal

Polymetallic and Au‐Ag Mineralizations at the Mutnovskoe Deposit in South Kamchatka, Russia

Inferences on the influences of age & porosity on oxidative weathering of seafloor massive sulfide deposits at the endeavour segment of the Juan de Fuca Ridge

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