Article
Geochemistry & Geophysics
Diogo Rosa, David Leach, Pierpaolo Guarnieri, Andrey Bekker
Summary: The Black Angel Zn-Pb deposit in the Paleoproterozoic Marmorilik Formation in West Greenland is associated with chloride-rich scapolite, ore-bearing marble with vuggy porosity, and quartz nodules. The mineralization is closely linked to anhydrite and is likely a Mississippi Valley-type (MVT) deposit. The Marmorilik Formation, which contains evaporite-carbonate sequences, is unique among the few known Paleoproterozoic MVT deposits. It provides insights into the seawater sulfate level during a time interval when extensive evaporite deposits were believed to be unlikely. The mineralization took place between the Nagssugtoqidian collision and Rinkian metamorphism events in the Karrat basin.
MINERALIUM DEPOSITA
(2023)
Article
Geology
Aroua Mzoughi, Hechmi Garnit, Salah Bouhlel, Georges Beaudoin, Driss Khlifa, Anis Barkouti, Zied Tebaibi
Summary: This study reveals the rock composition and formation mechanism of the Ain Allegua deposit in the Dougas diapir in northeastern Tunisia. The deposit consists primarily of celestite and Pb-Zn minerals and is located in the cap rock between the Triassic diapir and the surrounding Cretaceous to Lutetian marine sediments. The mineralization process underwent five stages involving the precipitation of various hydrothermal fluids. Sulfur isotope data suggest that the reduced sulfur in sulfides mainly originated from thermochemical sulfate reduction of Triassic sulfates. Lead isotope analysis reveals the source of lead, zinc, and barium in upper crustal rocks. This study provides important clues for understanding the genesis of the deposit and the formation of the minerals in the region.
ORE GEOLOGY REVIEWS
(2023)
Article
Geology
Tao Wu, Zhilong Huang, Yufan He, Mu Yang, Haifeng Fan, Chen Wei, Lin Ye, Yusi Hu, Zhenzhong Xiang, Chunkit Lai
Summary: The study of the Maoping carbonate-hosted Pb-Zn deposit in the Sichuan-Yunnan-Guizhou Pb-Zn metallogenic province revealed a thorough mixing of Pb sources from Devonian-Carboniferous ore-hosting carbonate wallrocks and Neoproterozoic clastic and metamorphic rocks. The deposit is classified as MVT type, with sulfide precipitation in structural traps caused by binary mixing of metal-bearing and reduced S-bearing fluids.
ORE GEOLOGY REVIEWS
(2021)
Article
Geology
Wenbin Jia, Da Wang, Yongsheng Li, Xiaofei Yu, Meng Dai, Guangsheng Yan
Summary: This article investigates the formation of the Huoshaoyun carbonate-hosted non-sulfide Zn-Pb deposit in the Karakoram area, northwest China. The study reveals that the mineral composition and isotopic characteristics of the deposit are influenced by sedimentary strata and atmospheric precipitation, and the sulfur is derived from low-temperature bacterial reduction of evaporative sulfate. Additionally, the lead isotopic composition of the deposit indicates a regional origin and suggests a new non-sulfide deposit type in China.
ORE GEOLOGY REVIEWS
(2023)
Article
Geosciences, Multidisciplinary
Fang Xia, Shun-Da Li, Chuan Chen, Ling-Ling Gao, Xue-Bing Zhang, Ke-Yong Wang
Summary: The Haerdaban Pb-Zn deposit in the Chinese Western Tianshan Orogen underwent three metallogenic stages, with different fluid inclusions indicating the sources of ore-forming fluids. The deposit is believed to have originated as a Proterozoic sedimentary exhalative deposit, later undergoing modifications by metamorphic remobilization and magmatic-hydrothermal mineralization.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geology
Li XiangCai, Wang JingBin, Zhu XinYou, Li ChengHou, Wu JinJian, Wang YongBin, Shi Min, Guo YuHang
Summary: In this study, the mineralization processes of the Jinding Pb-Zn deposit in Yunnan, China were investigated through field geological investigation and LA-(MC) ICP-MS trace element and S-Pb isotope microanalysis. The mineralization of the deposit can be divided into two main stages, with different mineral assemblages and structural characteristics. The ore-forming fluids are believed to be related to the basin brine and H2S-rich fluids in the early stage, as well as the mixing of meteoric water in the late stage. The sedimentary strata of the basin also contribute to the metal content of the deposit.
ACTA PETROLOGICA SINICA
(2023)
Article
Crystallography
Jia-Qi Shen, Zhi-Kang Hu, Shi-Yuan Cui, Yu-Fei Zhang, En-Qi Li, Wei Liang, Bo Xu
Summary: This study provides a comprehensive analysis of the aquamarine found in the Cuonadong Be-W-Sn Polymetallic Deposit in Longzi County, Tibet, including its gemmological properties and inclusions. The aquamarine is characterized by a higher content of type I H2O due to low-alkali metal content, with tetrahedral and octahedral substitutions present.
Article
Geology
Yun Du, Youyue Lu, Zunzun Zhang, Jianming Fu, Xiaoyong Yang, Zhuang Zhao, Zhengwei Qin, Jianfeng Chen, Rong Xiao, Jianfeng Li, Xiqing Chen, Zhengfu Zheng, Zhifang Zeng, Donggui Xiao, Pingyun Dai, Liyan Ma
Summary: The Indosinian W-Sn metallogeny associated with granites in South China has been the subject of recent research, but the genetic relations and tectonic setting of these deposits are still unclear in most areas. The Banjiaoyuan tin deposit in South China has two episodes of granitic stocks with different characteristics. The ages of these granites and mineralization indicate that they were formed in the late Indosinian period. The granites in this deposit are highly differentiated S-type granites and are likely derived from a mixture of mudstone and psammite in the crust.
ORE GEOLOGY REVIEWS
(2022)
Article
Geochemistry & Geophysics
Hassina Louha, Giuseppina Balassone, Abdelhak Boutaleb, Maria Boni, Michael M. Joachimski, Nicola Mondillo
Summary: The ore deposits of Bou Caid in Algeria are found in Jurassic and Cretaceous sedimentary rocks, mainly consisting of barite and nonsulfides. Mineralogical and geochemical analyses revealed the presence of hemimorphite, smithsonite, cerussite, hydrozincite, and Fe-oxy-hydroxides in the area.
Article
Geochemistry & Geophysics
Mohamed Mnasri, Adnen Amiri, Imen Hamdi Nasr, Wajdi Belkhiria, Mohamed Hedi Inoubli
Summary: We conducted an integrated interpretation of available geophysical data (gravity and electrical data) in the Sidi Bou Aouane-Khadhkhadha Pb-Zn province, located in northern Tunisia. The interpretive approach included Fourier transformation, spectral analysis, and edge enhancement techniques to analyze the gravity data and extract potential mineralization targets. Additionally, 3D inversion of resistivity and chargeability data provided insights into the basin architecture and different lithologies and mineralization types. The results revealed potential targets and provided evidence for future geological interpretations and mineral resource evaluations.
GEOPHYSICAL PROSPECTING
(2023)
Article
Geosciences, Multidisciplinary
Liangliang Zhuang, Yucai Song, David Leach, Yingchao Liu, Zengqian Hou, Mahmood Fard
Summary: The Angouran deposit is the second-largest Zn-Pb deposit in Iran, hosting sulfide mineralization in a marble-schist sequence within a breccia pipe in a domal structure. The features of the ore-hosting breccias resemble known halokinetic diapir breccias, with subtle evaporite minerals.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2023)
Article
Geology
Florian Altenberger, Johann G. Raith, Ronald J. Bakker, Alireza Zarasvandi
Summary: The Chah-Mesi polymetallic epithermal vein deposit is located in the Southeastern sector of the Urumieh-Dokhtar Magmatic Belt in Iran. The deposit is characterized by a variety of vein types hosting gold, silver and other precious metals, closely related to the nearby Meiduk porphyry Cu(Mo-Au) deposit.
ORE GEOLOGY REVIEWS
(2022)
Article
Multidisciplinary Sciences
Driss Yaagoub, Said Hinaje, Mohamed El Fartati, Youssef Gharmane
Summary: The MVT Pb-Ba mineralizations of the Mibladen ore deposit are primarily hosted by Jurassic carbonates and Infracenomanian conglomerates and sandstones. Economic ore bodies occur through various structural controls. Studies reveal two main fracture networks controlling the deposition of ore minerals, indicating the geological tectonic evolution history of the region.
RENDICONTI LINCEI-SCIENZE FISICHE E NATURALI
(2021)
Article
Geosciences, Multidisciplinary
Larbi Rddad
Summary: The Mississippi Valley-type Pb-Zn ore deposit in the Tigrinine-Taabast ore district in the southern border of the Moroccan Central High Atlas is hosted in hydrothermally dolomitized Hettangian-Sinumerian carbonates with a simple mineralogical paragenetic sequence. Fluid inclusions analysis on sphalerite indicates that sulfide ores precipitated from a warm and saline brine derived from a basin with high NaCl-CaCl2-MgCl2 content.
JOURNAL OF AFRICAN EARTH SCIENCES
(2021)
Article
Geology
Wei Zhang, Hua-Kai Chen, Jing-Hui Li, Wei Terry Chen, Xing-Chun Zhang, Yan-Wen Tang
Summary: The carbonatites in the southern margin of the North China Craton are characterized by abundant quartz and are closely associated with Mo-(REE) deposits. The fluid inclusions in the quartz of the carbonatites show high homogenization temperatures and low salinities, containing concentrations of La, Ce, Pr, Nd, Sr, and Ba. These findings suggest a genetic relationship between the Mo-(REE) deposits and the quartz-rich carbonatites.
ORE GEOLOGY REVIEWS
(2021)
Article
Geology
Zhong-Liang Wang, Li-Qiang Yang, Lin-Nan Guo, Erin Marsh, Jian-Ping Wang, Yue Liu, Chao Zhang, Rui-Hong Li, Liang Zhang, Xiao-Li Zheng, Rong-Xin Zhao
ORE GEOLOGY REVIEWS
(2015)
Article
Geochemistry & Geophysics
Albert H. Hofstra, Corey J. Meighan, Xinyu Song, Iain Samson, Erin E. Marsh, Heather A. Lowers, Poul Emsbo, Andrew G. Hunt
Article
Geology
Larbi Rddad, Salah Bouhlel
ORE GEOLOGY REVIEWS
(2016)
Review
Geology
Hechmi Garnit, Salah Bouhlel
ORE GEOLOGY REVIEWS
(2017)
Article
Geology
Kun-Feng Qiu, Erin Marsh, Hao-Cheng Yu, Katharina Pfaff, Cayce Gulbransen, Zong-Yang Gou, Nan Li
ORE GEOLOGY REVIEWS
(2017)
Article
Geosciences, Multidisciplinary
Jaloul Bejaoui, Salah Bouhlel, Ahmed Sellami, Ahmed Braham
ARABIAN JOURNAL OF GEOSCIENCES
(2014)
Article
Geochemistry & Geophysics
A. H. Hofstra, T. I. Todorov, C. N. Mercer, D. T. Adams, E. E. Marsh
Article
Geochemistry & Geophysics
Nan Li, Jun Deng, Li-Qiang Yang, Richard J. Goldfarb, Chuang Zhang, Erin Marsh, Shi-Bin Lei, Alan Koenig, Heather Lowers
MINERALIUM DEPOSITA
(2014)
Article
Geosciences, Multidisciplinary
Wyatt M. Bain, Matthew Steele-MacInnis, Kan Li, Long Li, Frank K. Mazdab, Erin E. Marsh
Article
Geochemistry & Geophysics
Rodrigo Prudente de Melo, Marcos Aurelio Farias de Oliveira, Richard J. Goldfarb, Craig A. Johnson, Erin E. Marsh, Roberto Perez Xavier, Leandro Rocha de Oliveira, Leah E. Morgan
Summary: Fluid inclusion data, stable isotope geochemistry, and geothermometry suggest that gold was formed from a low-salinity, CO2-rich fluid at around 300 degrees C and 2.5 kbar pressure. The fluid and gold originated from interbedded pelites during the devolatilization process of the Aguapei Group. A regional ore-forming fluid is represented by the aqueous-carbonic fluid inclusions and the narrow range of delta O-18 values of quartz from auriferous veins in the central part of the province. The variation in delta D values of hydrous minerals reflects the influx of small amounts of meteoric water into shear zones after gold deposition. The geochronology data indicate a widespread hydrothermal event in the belt between 928 and 920 Ma. The migration of metamorphic fluids along the Aguapei belt and the deposition of gold in lower-order structures suggest the province's potential as an underexplored target region for early Neoproterozoic gold, a time period that generally lacks significant gold deposits.
Article
Geochemistry & Geophysics
Shen Gao, Albert H. Hofstra, Xinyu Zou, John W. Valley, Kouki Kitajima, Erin E. Marsh, Heather A. Lowers, David T. Adams, Kezhang Qin, Hong Xu
Summary: Studies on tellurium-rich and tellurium-poor epithermal gold-silver deposits in northeastern China show that large oxygen isotope shifts and higher homogenization temperatures are correlated with the precipitation of gold-silver telluride minerals in the former, indicating the critical role of magmatic fluid inputs in the formation of tellurium-rich deposits. In contrast, tellurium-poor deposits exhibit little to no evidence of magmatic fluid inputs based on oxygen isotope ratios and fluid inclusion data.
AMERICAN MINERALOGIST
(2021)
Article
Geochemistry & Geophysics
George N. D. Case, Garth E. Graham, Erin E. Marsh, Ryan D. Taylor, Carlin J. Green, Philip J. Brown, Keith A. Labay
Summary: Tungsten (W) is a critical mineral used in various industrial and technological applications, with major importing countries such as the United States relying heavily on imports from China, making them vulnerable to supply disruptions. The exploration of undiscovered W skarn resources in the lesser-explored western Alaskan portion of the Yukon-Tanana Upland (YTU) showed high potential for W skarn deposits. Utilizing GIS analysis, three permissive tracts were identified and assessed qualitatively for mineral potential mapping. Expert estimates predict a high chance of undiscovered W skarn deposits in the western YTU tract, with a median estimate of economically recoverable resources of 63 kt WO3 close to infrastructure in the area. Further geological mapping and surveys are recommended to refine the understanding of the resource potential in the entire YTU region.
JOURNAL OF GEOCHEMICAL EXPLORATION
(2022)
Article
Geology
Ryan D. Taylor, Leah E. Morgan, Fred Jourdan, Thomas Monecke, Erin E. Marsh, Richard J. Goldfarb
Summary: The Klamath Mountains gold province in California is the second most important historical producer of gold, having produced over 7 million ounces of gold. The study of hydrothermal muscovite grains suggests that the mineralization in the Klamath Mountains lasted for about 20-30 million years. There is no genetic link between the hydrothermal activity and magmatism, and the formation of gold deposits in the region is related to tectonic events, changes in stress regime, and fault movement.
ORE GEOLOGY REVIEWS
(2022)