In-situ LA–ICP–MS trace elements analysis of magnetite: The Fenghuangshan Cu–Fe–Au deposit, Tongling, Eastern China

Huang, Xiaowen; Gao, Jianfeng; Qi, Liang; Meng, Yu-Miao; Wang, Yichang; Dai, Zhendong

doi:10.1016/j.oregeorev.2015.09.012

Cited by 44 publications

(19 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The similar bulk continental crust normalized trace element patterns of magnetite in our study (Figure ) indicates that the magnetite grains from the different hydrothermal stages share a similar origin (Huang et al, ). However, magnetite also indicates relative enrichment or depletion in some trace elements (Table ), which may due to other factors.…”

Section: Discussionsupporting

confidence: 83%

“…The result represents the decreasing degree of fluid–rock interaction during the skarn formation process (Figure ). similar to that in the Fenghuangshan Cu–Fe–Au deposit, Tongling, Eastern China (Huang et al, ). Magnetite grains from the retrograde skarn stage show continuous variation of Al and Ga contents, whereas those from the sulphide stage define another field (Figure d).…”

Section: Discussionsupporting

confidence: 74%

“…In magmatic systems, V and Cr contents of magnetites decrease with Ti increasing during silicate fractionation (Dare et al, ). For the Huanggang deposit, magnetite shows a positive correlation of V with Ti (Figure i), which is typical of a hydrothermal magnetite, and is similar to that in the Fenghuangshan Cu–Fe–Au skarn deposit of the Tongling area, Eastern China (Huang et al, ). The trace element concentration of hydrothermal magnetite is controlled by various factors under different hydrothermal environments (Nadoll et al, ).…”

Section: Discussionmentioning

confidence: 59%

“…The reference field of Fe‐skarn deposits is from Zhao and Zhou (), Hu et al (, ). The reference field of Cu–(Fe ± Pb ± Zn)‐skarn deposit is from Nadoll et al (), Huang et al (). The reference field of Fe–Cu skarn deposits is from Wang et al () [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Discussionmentioning

confidence: 99%

See 3 more Smart Citations

Geochemistry of magnetite from theHuanggangskarn iron–tin polymetallic deposit in the southernGreat Xing'an Range, NE China

et al. 2017

View full text Add to dashboard Cite

The Huanggang iron–tin polymetallic skarn deposit is located in the southern Great Xing'an Range. According to the ore types and mineral assemblages, the paragenetic sequence of the Huanggang deposit can be divided into three stages, and these magnetite grains were mainly formed at the retrograde and sulphide skarn stages. The magnetite (sample HG12‐13) from the early retrograde stage is represented by fine‐grained magnetite cutting across coarse‐grained magnetite surrounded by quartz and calcite. The magnetite (sample HG12‐73) from the late retrograde stage is locally replaced by haematite along the margin or interior and is surrounded by calcite. The magnetite (sample HG12‐88) from the early sulphide stage is characterized by obvious core–rim textural features. The magnetite (sample HG‐62) from the late sulphide stage is featured by zone‐like magnetite occurring along the margin and interior of the primary magnetite. Laser ablation inductively coupled plasma mass spectrometry was used to obtain trace element concentrations of magnetite from the different mineralization stages in order to better understand the geochemical variations in the ore‐forming process. Some magnetite grains have abnormally high Mg, Al, K, Cu, Zn, and Sn due to the presence of numerous inclusions (e.g., chlorite, sylvite, chalcopyrite, sphalerite, and cassiterite). In general, magnetite grains from the different mineralization stages demonstrate similar bulk continental crust normalized trace elements patterns, suggesting that they share a similar origin. The increasing Si + Al/Mg + Mn ratios and decreasing Mg + Mn contents for magnetite show an increasing fluid–rock ratio from the retrograde to sulphide stage. Co contents of magnetite decrease abruptly from the retrograde stage to the sulphide stage, whereas Mn contents show the reverse trend, which is affected by minerals coprecipitating with magnetite. A zoned magnetite from the sulphide stage shows decreasing Ti and V contents from core to outer rim; the variation of Ti and V may be related to the temperature or oxygen fugacity. Magnetite compositions from the Huanggang deposit are similar to those from Fe, Cu‐polymetallic, or other skarn deposits, but display more variable compositions than previously presented. Our study demonstrates that the evolution of magnetite in the skarn deposit and trace element of magnetite could be a powerful tool in determining the origin of skarn iron deposit.

show abstract

Section: Discussionsupporting

confidence: 83%

Section: Discussionsupporting

confidence: 74%

Section: Discussionmentioning

confidence: 59%

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Geochemistry of magnetite from theHuanggangskarn iron–tin polymetallic deposit in the southernGreat Xing'an Range, NE China

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Pentagen filled by gray represents the average Ge content for individual deposit, similarly hereinafter. Data sources: magmatic deposits (Dare et al, 2012(Dare et al, , 2014Liu et al, 2015), iron formations (Dare et al, 2014;Chung et al, 2015), skarn Fe deposits (Zhao and Zhou, 2015;Huang et al, 2016), iron oxide copper-gold deposits (Dare et al, 2014;Chen et al, 2015a), igneous derived hydrothermal Fe deposits (Huang et al, 2013b(Huang et al, , 2014a. The Ge content of bulk continental crust is referenced to Rudnick and Gao (2003), similarly hereinafter.…”

Section: ) Ni-cu-pge Depositsmentioning

confidence: 99%

Germanium in Magnetite: A Preliminary Review

Meng

Huang

et al. 2017

Acta Geologica Sinica (Eng)

View full text Add to dashboard Cite

Magnetite is a very common mineral in various types of iron deposits and some sulfide deposits. Recent studies have focused on the use of trace elements in magnetite to discriminate ore types or trace ore‐forming process. Germanium is a disperse element in the crust, but sometimes is not rare in magnetite. Germanium in magnetite can be determined by laser ablation ICP‐MS due to its low detection limit (0.0X ppm). In this study, we summary the Ge data of magnetite from magmatic deposits, iron formations, skarn deposits, iron oxide copper‐gold deposits, and igneous derived hydrothermal deposits. Magnetite from iron formations contains relatively high Ge (up to ∼250 ppm), whereas those from all other deposits mostly contains Ge less than 10 ppm, indicating that iron formations can be discriminated from other Fe deposits by Ge contents. Germanium in magmatic/hydrothermal magnetite is controlled by a few factors. Primary magma/fluid composition may be the major control of Ge in magnetite. Higher oxygen fugacity may be beneficial to Ge partition into magnetite. Sulfur fugacity and temperature may have little effect on Ge in magnetite. The enrichment mechanism of Ge in magnetite from iron formations remains unknown due to the complex ore genesis. Germanium along with other elements (Mn, Ni, Ga) and element ratios (Ge/Ga and Ge/Si raios) can distinguish different types of deposits, indicating that Ge can be used as a discriminate factor like Ti and V. Because of the availability of in situ analytical technique like laser ablation ICP‐MS, in situ Ge/Si ratio of magnetite can serve as a geochemical tracer and may provide new constraints on the genesis of banded iron formations.

show abstract

Textures and trace element geochemistry of magnetite in the Beiya gold deposit, SW China

et al. 2021

View full text Add to dashboard Cite

The Beiya gold deposit (323t of gold @ 2.47 g/t) is located in the centre of the Jinshajiang‐Ailaoshan potassium alkaline porphyry Cu‐Au metallogenic belt in SW China, which is the largest skarn gold deposit in China. As the dominant ore mineral at Beiya, magnetite has been selected as a petrogenetic indicator to understand the ore‐forming process. In this study, magnetites have been divided into the euhedral–subhedral (ME), anhedral (MA), lamellar (ML), and replaced (MR) types based on their textures, which have been further determined by in situ laser ablation inductively coupled plasma mass spectrometry analyses. In detail, plots in discriminant diagrams constrain the Beiya magnetite a hydrothermal origin. Trace elements in magnetite vary with respect to different textures. Titanium concentrations are similar in all magnetite types, suggesting that all magnetites were precipitated in a relatively narrow temperature range. The decreasing V content combined with haematite after magnetite (martitization) suggests that the oxygen fugacity increased from ME and MA and then decreased to ML and MR. All magnetite types show similar content variations and similar (Mg + Mn)/Al ratios, indicating a decreasing degree of fluid–rock interactions. The rim–core texture indicates that the MR type magnetite has experienced the dissolution–reprecipitation process. Mushketovite marks the later ore‐forming environment and the iron‐rich hydrothermal fluids transformed from high temperature and oxidized to low temperature and reduced features. Magnetite textures, combined with its trace element variations, could be used as a potential tool for inferring the ore‐forming fluid evolution.

show abstract

In-situ LA–ICP–MS trace elements analysis of magnetite: The Fenghuangshan Cu–Fe–Au deposit, Tongling, Eastern China

Cited by 44 publications

References 29 publications

Geochemistry of magnetite from theHuanggangskarn iron–tin polymetallic deposit in the southernGreat Xing'an Range, NE China

Geochemistry of magnetite from theHuanggangskarn iron–tin polymetallic deposit in the southernGreat Xing'an Range, NE China

Germanium in Magnetite: A Preliminary Review

Textures and trace element geochemistry of magnetite in the Beiya gold deposit, SW China

Contact Info

Product

Resources

About