Article
Geosciences, Multidisciplinary
Zhichao Zhang, Yuwang Wang, Dedong Li, Wei Wang, Shenghui Li, Jinzhu Qiu, Chunkit Lai, Xiang Li
Summary: The study of Baiyun gold deposit revealed a close relationship between alteration and mineralization, with silicic and K-feldspar alterations playing a significant role in ore formation. The ore-forming fluids consist mainly of primary magmatic fluids mixed with minor metamorphic fluids. Invisible gold mainly occurs as solid solution or nano-particles.
GEOLOGICAL JOURNAL
(2021)
Article
Geochemistry & Geophysics
Sebastian Staude, Dominic Raisch, Gregor Markl
Summary: There is an ongoing debate regarding the extent to which metamorphosed ore deposits were molten, but investigations of the granulite-facies Bodenmais SEDEX deposit in Germany provide evidence that the sulfides were molten to a large extent. Texture analysis reveals similarities to magmatic sulfide deposits, including sulfide-matrix breccia, emulsion textures, and pegmatitic leucosomes. Differences in mineral chemistry between the sulfides and migmatitic host rocks further support the hypothesis of sulfide anatexis. The observed crystallization sequence and spatial arrangement within the deposit provide unequivocal evidence for the molten state of the sulfides.
MINERALIUM DEPOSITA
(2023)
Article
Geochemistry & Geophysics
Ernowo Ernowo, Arifudin Idrus, Franz Michael Meyer
Summary: Hydrothermal gold mineralization is related to metasomatic processes caused by interaction of rock with hot aqueous fluids. The alteration mechanism can be understood by quantifying element changes in altered rock. In the Awak Mas deposit, balanced mineral reactions were used to study gold mineralization associated alteration. The addition of Si, Na, and Ca was significant in each alteration zone. The volume change during alteration was negligible, indicating isovolumetric metasomatic reactions. The replacement of muscovite by albite may have influenced the rock failure mode and fluid flow concentration.
Article
Geosciences, Multidisciplinary
Ying Ma, Shao-Yong Jiang, Hartwig E. Frimmel, Suo-Fei Xiong, Lu-Yun Zhu, Run-Sheng Chen
Summary: The Shuangqishan gold deposit is located in a poorly-documented gold province in the southeastern Cathaysia Block in South China, formed during the late Wuyi-Yunkai intracontinental orogeny. The deposit is mainly associated with quartz-sulfide veins and has distinct alteration haloes.
Article
Geosciences, Multidisciplinary
Chuanwei Zhu, Hanjie Wen, Yuxu Zhang, Zhilong Huang, Christophe Cloquet, Beatrice Luais, Tao Yang
Summary: The study of Cd isotopic geochemistry in the Huize deposit reveals different signatures in sphalerites formed at different stages, suggesting significant Cd isotopic fractionation during the mineralization process. The Cd isotopic compositions of large Zn-Pb deposits in the SYG area are influenced by the mixing of Emeishan basalts and sedimentary rocks, and indicate a negative correlation with 1/Cd, providing insights into ore genesis.
GEOSCIENCE FRONTIERS
(2021)
Article
Energy & Fuels
Yongliang Liu, Zhidong Ou, Hongda Deng, Zewei Zhang, Yunfan Zeng, Jian Liu
Summary: This study investigates the deposition formation in the breathing pipe of a produced water storage tank in a sulfide-containing natural gas station. The deposit is found to be composed of elemental sulfur and corrosion scales of ferrous polysulfide and ferrous sulfate. New deposit formation models based on thermodynamic models are established to predict the deposition of elemental sulfur, ferrous polysulfide, and ferrous sulfate scale. The prediction results of the models are consistent with actual chemical composition analysis, validating their accuracy and reliability.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2023)
Article
Geology
Liang Li, Fengyue Sun, Bile Li, Yins Bai, Chao Wang, Ye Qian, Yonggang Sun, Shucheng Tan
Summary: The Sancha Cu-Ni-Au deposit in NW China is a sulfide deposit associated with magmatic CuNi-(Au) and hydrothermal Au-(Cu) mineralization. The deposit has notable alteration and mineralization caused by hydrothermal fluids, but it has no significant effect on the distribution of Ni and Co. The deposit formed through magmatic Ni-Cu-(Au) mineralization and hydrothermal Au-(Cu) mineralization at different periods.
ORE GEOLOGY REVIEWS
(2022)
Article
Geology
Zhixin Zhao, Junhao Wei, Shengnan Liang, Tian Gao
Summary: Recent attention has been drawn towards the effects of post-ore metamorphism and deformation on trace element concentrations in sulfides. This study evaluated the influence of regional metamorphism and deformation on sulfide remobilization and trace element distribution in the Xitieshan deposit in NW China. The findings suggest that recrystallized chalcopyrite grains tend to have higher concentrations of Indium, Tin, and Silver, indicating preferential incorporation of these elements into chalcopyrite under metamorphic conditions.
ORE GEOLOGY REVIEWS
(2021)
Article
Geochemistry & Geophysics
Huajian Li, Qingfei Wang, Lin Yang, Chaoyi Dong, Weijun Weng, Jun Deng
Summary: The hydrothermal alteration and mineralization types of orogenic gold deposits vary greatly depending on various factors. Establishing reference patterns of hydrothermal alteration is crucial for understanding this deposit system.
Article
Geochemistry & Geophysics
Zhuojun Xie, Kang-Jun Huang, Yong Xia, Jean Cline, Qinping Tan, Jianzhong Liu, Jingdan Xiao, Bing Yan
Summary: This study uses carbonate Mg isotopes to provide new insights into the source of ore fluids and the genesis of the Guizhou Carlin-type Au deposits. The results indicate a magmatic-hydrothermal origin for the ore fluids, supported by other isotopes and geological evidence. The study suggests that Mg isotopes can be a useful proxy for inferring ore fluid source and evolution.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Chemistry, Inorganic & Nuclear
Mohamed A. El-Sadek
Summary: By analyzing airborne gamma-ray spectrometry data, areas that have experienced hydrothermal activity can be identified, aiding in the identification of potential mineral deposits and providing new criteria for mineral exploration prospecting.
APPLIED RADIATION AND ISOTOPES
(2022)
Article
Environmental Sciences
Qi Chen, Zhifang Zhao, Jiaxi Zhou, Ruifeng Zhu, Jisheng Xia, Tao Sun, Xin Zhao, Jiangqin Chao
Summary: This study successfully mapped hydrothermal alteration minerals using ASTER and GF-5 satellite data, revealing the distribution characteristics of hydrothermal alteration minerals in the Longtoushan Pb-Zn deposit and validating the mapping ability of GF-5 data. This is of great significance for future systematic mapping of hydrothermal alteration minerals.
Article
Geosciences, Multidisciplinary
Olivier Nadeau, Alexandre Voinot, Matthew Leybourne
Summary: The study of Li isotopic composition of hydrothermal alteration in the Kirkland Lake gold deposit sheds light on the genesis of the deposit, revealing that gold followed Li as colloidal particles during precipitation. It was found that the mineralization of the deposit was attributed to magmatic fluids, metamorphic fluids, and groundwaters, providing a new interpretation of the deposit formation.
PRECAMBRIAN RESEARCH
(2021)
Article
Geology
Ma. Isabella Hermo, Maria Ines Rosana Balangue-Tarriela, Ryohei Takahashi, Jillian Aira Gabo-Ratio, Sofia Marah Frias
Summary: This study conducted detailed petrographic and mineralogical analyses on the quartz-fragment-rich breccia in the Didipio alkalic porphyry deposit of Nueva Vizcaya, Philippines, identifying two main types of mineralization: porphyry-style and epithermal-style.
ORE GEOLOGY REVIEWS
(2022)
Article
Geochemistry & Geophysics
Laura R. Katz, Daniel J. Kontak, Benoit Dube, Vicki McNicoll, Robert Creaser, Joe A. Petrus
Summary: The Cote Gold deposit is the first large gold deposit discovered in the Swayze greenstone belt, Ontario, Canada, hosting mineralization and related alteration with relative and absolute age constraints, suggesting a magmatic-hydrothermal origin for the gold mineralization. The hydrothermal activity around 2740 Ma is constrained by U-Pb and Re-Os ages, indicating a significant new gold metallogenic event in the Abitibi subprovince, with similarities to Phanerozoic Au-Cu porphyry deposits.