Textural Relationship of Sulfide Ores, PGE, and Sr-Nd-Os Isotope Compositions of the Triassic Piaohechuan Ni-Cu Sulfide Deposit in NE China

2015 ◽  
Vol 110 (8) ◽  
pp. 2041-2062 ◽  
Author(s):  
Bo Wei ◽  
Christina Yan Wang ◽  
Nicholas T. Arndt ◽  
Hazel M. Prichard ◽  
Peter C. Fisher
Keyword(s):  
Sulfide Deposit ◽  
Sulfide Ores ◽  
Ne China ◽  
Textural Relationship ◽  
Relationship Of ◽  
Os Isotope

Re-Os Isotopic Age of the Hongqiling Cu-Ni Sulfide Deposit in Jilin Province, NE China and its Geological Significance

2014 ◽  
Vol 64 (3) ◽  
pp. 247-261 ◽  
Author(s):  
Chunming Han ◽  
Wenjiao Xiao ◽  
Guochun Zhao ◽  
Benxun Su ◽  
Songjian Ao ◽  
...  
Keyword(s):  
Jilin Province ◽  
Sulfide Deposit ◽  
Isotopic Age ◽  
Ne China ◽  
Geological Significance

scholarly journals Heterogeneous Os isotope compositions in the Kalatongke sulfide deposit, NW China: the role of crustal contamination

2012 ◽  
Vol 47 (7) ◽  
pp. 731-738 ◽  
Author(s):  
Jian-Feng Gao ◽  
Mei-Fu Zhou ◽  
Peter C. Lightfoot ◽  
Wenjun Qu
Keyword(s):  
Crustal Contamination ◽  
Sulfide Deposit ◽  
Nw China ◽  
Os Isotope

scholarly journals REE geochemistry and mineralogy of ores from the Talgan Cu-Zn massive sulfide deposit, South Urals

2019 ◽  
Vol 487 (6) ◽  
pp. 659-662
Author(s):  
N. R. Ayupova ◽  
V. V. Maslennikov ◽  
K. A. Filippova
Keyword(s):  
Massive Sulfide ◽  
Sulfide Deposit ◽  
South Urals ◽  
Sulfide Ores ◽  
Massive Sulfide Deposit ◽  
Sulfide Deposits ◽  
Order Of Magnitude ◽  
Ree Patterns ◽  
First Time ◽  
Mixed Carbonate

The high REE contents (57,23-561,2 ppm) of thin-layered sulfide ores of the Talgan Cu-Zn massive sulfide deposit (South Urals) are related to the presence of REE minerals: galgenbergite, parisite, bastnesite, synchysite and xenotime, which were found for the first time in massive sulfide deposits of the Urals. These minerals occur in quartz-carbonate-chlorite matrix of sulfide layers, as well as pyrite nodules and sub- and euderal crystals. The chondrite-normalized REE patterns are enriched in LREEs relatively to HREEs and the presence of weak negative cerium and positive europium anomalies. The LREE contents decrease by an order of magnitude and the LREE and HREE contents become similar with decreasing amount of hyaloclastic material in sulfide layers. The REEs for the formation of REE minerals are derived from mixed carbonate-hyaloclastic and ore material during the formation of layered sulfide ores.

Contrasting Geochemistry of Apatite from Peridotites and Sulfide Ores of the Jinchuan Ni-Cu Sulfide Deposit, NW China

2021 ◽  
Author(s):  
Mei-Yu Liu ◽  
Mei-Fu Zhou ◽  
Shang-Guo Su ◽  
Xue-Gen Chen
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Limit Of Detection ◽  
Sulfide Minerals ◽  
Hydrothermal Fluids ◽  
Sulfide Deposit ◽  
Volatile Components ◽  
Sulfide Ores ◽  
Sulfide Ore

Abstract Apatite is present within both the hosting lherzolite and sulfide ore at the Jinchuan magmatic Ni-Cu sulfide deposit of northwest China. Apatite grains within the lherzolite are generally large and hexagonal (>200 μm) and are associated with interstitial phlogopite and amphibole. These apatite grains contain ~0.9 wt % F, ~1 wt % Cl, 6,800 to 14,500 ppm rare earth elements (REE) and have in situ δ18OV-SMOW values of 5.10 to 6.38‰, all of which are indicative of crystallization from an evolved silicate magma. In comparison, the massive and disseminated sulfide ores contain fine-grained apatite (<200 μm) that is associated with sulfide minerals, phlogopite, and albite. These apatite grains contain sulfide inclusions that are indicative of crystallization almost coevally with or slightly later than the sulfide minerals. They are Cl-rich apatite with an average Cl of 5.6 wt % but F concentrations are below the limit of detection. They contain 1,860 to 2,300 ppm REE and have in situ δ18OV-SMOW values of 5.62 to 6.47‰. These data suggest that the sulfide-associated apatite formed from F- and REE-depleted, Cl-bearing sulfide melts. The apatite within the lherzolite was overprinted by later hydrothermal fluids as evidenced by the presence of abundant rounded and needle-like monazite and rare allanite inclusions within the apatite that formed as a result of a coupled metasomatism-reprecipitation process shortly after crystallization. Altered and fresh apatite domains have similar δ18O values, suggesting that this alteration was induced by postmagmatic hydrothermal fluids. The apatite within the lherzolite and sulfide ore crystallized from two conjugate immiscible silicate and sulfide melts, respectively. Rare earth elements and F were preferentially partitioning into silicate melts, whereas most volatile components were mainly partitioned into the sulfide melts. The silicate magmas from which apatite crystallized were rich in light REE (LREE) relative to heavy REE (HREE). Volatile components in the sulfide melts changed the physicochemical conditions to enable such high-density melts to migrate upward and finally settle in the shallow chamber with silicate rocks.

Seismic properties of the Voisey’s Bay massive sulfide deposit: Insights into approaches to seismic imaging

Geophysics ◽  
2012 ◽  
Vol 77 (5) ◽  
pp. WC59-WC68 ◽  
Author(s):  
Deanne Duff ◽  
Charles Hurich ◽  
Sharon Deemer
Keyword(s):  
Physical Properties ◽  
Seismic Imaging ◽  
Imaging Technique ◽  
Imaging Techniques ◽  
Massive Sulfide ◽  
Mineral Deposit ◽  
Sulfide Deposit ◽  
Seismic Velocities ◽  
Sulfide Ores ◽  
Host Rocks

Seismic methods offer significant potential advantages for minerals exploration over more traditional geophysical techniques because of the comparatively high resolution of seismic imaging. This is particularly true as minerals exploration is required to explore deeper to find resources. However, adaptation of seismic imaging techniques to the complex crystalline targets common in the mining environment requires a thorough understanding of the physical properties of the specific combination of ore and host rocks under consideration to choose an appropriate imaging technique. Analysis of the sulfide ores and associated host rocks from the Voisey’s Bay nickel-copper-cobalt deposit indicates that in the pyrrohotite-pentlandite-rich but pyrite-poor assemblage at Voisey’s Bay, seismic velocities are significantly lower ([Formula: see text]) than either the felsic or mafic host rocks ([Formula: see text] and [Formula: see text]). This observation is in contrast with pyrite-rich massive sulfide ores that have velocities that are significantly higher than typical host rocks. The large velocity contrast between the Voisey’s Bay ores and their host rocks makes them good targets for tomographic imaging. However, due to the trade-off between the low velocities and high densities of the Voisey’s Bay sulfides, acoustic impedance contrasts can be quite modest making them less attractive for seismic reflection imaging. Detailed analysis of two different mineralized zones at Voisey’s Bay further demonstrated that, depending on the limiting signal-to-noise ratio, the choice of an effective seismic imaging technique is not universal across a mineral deposit and may be affected by subtle variations in sulfide mineralogy and by the structural/magmatic setting. Our analysis clearly indicated that knowledge of physical properties and geologic setting is critical to the choice of which seismic technique to apply in a given exploration setting.

Sign in / Sign up

Export Citation Format

Share Document