Article
Geochemistry & Geophysics
Zia Steven Kahou, Stephanie Brichau, Marc Poujol, Stephanie Duchene, Eduardo Campos, Mathieu Leisen, Francois-Xavier D'Abzac, Rodrigo Riquelme, Sebastien Carretier
Summary: This study presents the first attempt to date copper-rich minerals from the Mina Sur exotic deposit in the Chuquicamata mining district in northern Chile using U-Pb dating. The results indicate that the copper deposition at Mina Sur occurred around 19 Ma, consistent with known supergene ages in the Atacama Desert. This research demonstrates the feasibility of directly dating supergene copper mineralization using the U-Th-Pb method on pseudomalachite.
MINERALIUM DEPOSITA
(2021)
Article
Geochemistry & Geophysics
Utreck Rumbiak, Chun-Kit Lai, Reza Al Furqan, Mega Rosana, Euis Yuningsih, Basilios Tsikouras, Elena Ifandi, Amal Izzati Afiqah Binti Abdul Malik, Huayong Chen
Summary: The study of the Ertsberg-Grasberg district reveals the relationships between different ore stages and elemental migration in the skarn system, uncovering the ore formation process and chemical characteristics for future exploration of ore deposits.
JOURNAL OF GEOCHEMICAL EXPLORATION
(2022)
Article
Geosciences, Multidisciplinary
Yi-Yun Wang, Xiang Fang, Ju-Xing Tang, Bin Lin, Yang Song, Huan-Huan Yang, Zhi Zhang, Qin Wang, Ke Gao, Hong-Yu Zhan
Summary: The Tiegelongnan deposit is a giant deposit in the west of the Bangong Co-Nujiang metallogenic Belt, characterized by porphyry and epithermal types of alteration and mineralization. It developed two stages of hydrothermal alteration and mineralization, with distinct sulfide minerals precipitating throughout the process. The deposit is a complex porphyry metallogenetic system with multiple structures, transitioning from high-grade high-sulfidation epithermal mineralization to continuous porphyry-type mineralization at depth.
GEOLOGICAL JOURNAL
(2023)
Article
Geochemistry & Geophysics
Bernhard Dold, Marie-Caroline Pinget, Lluis Fontbote
Summary: Detailed mineralogical and textural studies, combined with sequential X-ray diffraction and geochemical modeling, solved the copper pitch/wad enigma in the Exotica deposit. The evolution of the deposit is explained through a four-step genetic model, linking mineralogical, geochemical, and textural evidences with the geological, tectonic, and climatic evolution of the Chuquicamata-Calama area.
MINERALIUM DEPOSITA
(2023)
Article
Geochemistry & Geophysics
Jorge E. Morales-Leal, Eduardo Campos, Kalin Kouzmanov, Rodrigo Riquelme
Summary: This study investigates the mineralogical and geochemical characteristics of the advanced argillic (AA) alteration in the Potrerillos district, Atacama Desert, Chile. The results provide insights into the physicochemical parameters, composition, source, and evolution of the fluids that produced the AA alteration. Different precipitation environments with various sulfur sources and alunite group minerals have been defined. The temperature estimation for the hypogene alteration is 120-200 degrees C.
MINERALIUM DEPOSITA
(2023)
Article
Geochemistry & Geophysics
Zongdong Pan, Hesheng Hou, Wei Fu, Xiaofan Deng, Jiaduo Zhang, Hengcheng Ying
Summary: Through a study of seismic reflection profiles, the characteristics of deeply buried deposits in the Duobaoshan ore district and the presence of hidden granite bodies and fault zones are revealed. Comprehensive research on the formation and distribution of ore deposits shows that the deposits are related to hidden granite bodies and fault zones.
Article
Chemistry, Multidisciplinary
El yakout El Koraychy, Riccardo Ferrando
Summary: We simulated the formation of Cu@Au core@shell nanoparticles by depositing gold on preformed seeds and studied the effect of the shape and composition of the starting seed on the growth pathway. Our results show that the shape and composition of the seed have significant effects on the growth pathways of Cu@Au core@shell nanoparticles.
Article
Geology
Junchen Liu, Yitian Wang, Jingwen Mao, Wei Jian, Qiaoqing Hu, Ran Wei, Xiangwei Zhang, Jiaolong Hao, Jianming Wang
Summary: The Xiaoqinling district in China is an important gold district, with significant gold resources. New research on the region's deposits suggests that molybdenum and gold were introduced in two distinct mineralization events, with different mineral assemblages, ages, fluid properties, and sources.
ORE GEOLOGY REVIEWS
(2022)
Article
Geology
Jilong Han, Jun Deng, Yong Zhang, Jinggui Sun, Qingfei Wang, Yingmei Zhang, Xiaotian Zhang, Yang Liu, Chuntao Zhao, Fan Yang, Linlin Wang, Zuochao Lin
Summary: The study indicates that the ore-related intrusions in the Jiapigou mining district were emplaced during the Middle Jurassic, likely derived from an enriched lithospheric mantle source influenced by fluids and partial melting of Archean crustal materials. The formation of the giant Au mineralization and ore-related magmatism in an extensional setting associated with the subduction of the Paleo-Pacific Plate. Basic dikes and granites served as precursors for the Au mineralization in the JMD, with mantle- and crustal-fluids and metals contributing significantly to the formation of the giant Au mineralization in the JMD.
ORE GEOLOGY REVIEWS
(2022)
Article
Geochemistry & Geophysics
Zhiqiang Zhang, Gongwen Wang, Yunna Ding, Emmanuel John M. Carranza
Summary: This study focused on the Tongling Cu(-Au) district in China, compiling and analyzing multiple datasets in order to explore blind mineral deposits in the subsurface. By constructing a 3D geological model and integrating various exploration criteria through spatial analyses and interpolation methods, high-potential Cu(-Au) targets were identified. The methodology discussed is applicable to other magma-skarn districts around the world.
JOURNAL OF GEOCHEMICAL EXPLORATION
(2021)
Article
Geology
Bingke Sun, Banxiao Ruan, Xinbiao Lv, Zhihui Dai, Chen Mao
Summary: The newly discovered Huangtan Au-Cu deposit in the Eastern Tianshan represents the first Au-dominated volcanogenic massive sulfide polymetallic deposit in the region. The ore-forming fluids are characterized by middle-low temperature, low salinity, and a complex H2O-NaCl + CO2 + CH4 system, with metal precipitation mechanisms involving fluid cooling dilution, local boiling, and fluid mixing. Isotopic data suggest a deep-seated magma source for ore-forming materials in this unique VMS metallogenic system.
ORE GEOLOGY REVIEWS
(2021)
Article
Geochemistry & Geophysics
Rong Xu, Rolf L. Romer, Johannes Glodny
Summary: The study utilized whole rock chemistry mass balance calculations and multiple isotope data to determine the source of metals and fluids in different alteration stages of the granite, indicating that external fluids may contribute to the increase in copper and sulfur content in the granite, while the tin content may decrease with higher degrees of alteration.
Article
Geosciences, Multidisciplinary
Zhongjiang Zang, Wei Liu, Leilei Dong
Summary: Through Re-Os dating and comparison of rare earth element data, the study revealed that the iron mineralization in the Qiaoxiahala deposit may have originated from fluid exsolution from basaltic volcanism, while the deposition of copper and gold may have been sourced from nearby dioritic intrusions.
JOURNAL OF EARTH SCIENCE
(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
Environmental Sciences
Rafael N. Linan-Abanto, William Patrick Arnott, Guadalupe Paredes-Miranda, Omar Ramos-Perez, Dara Salcedo, Hugo Torres-Muro, Rosa M. Linan-Abanto, Giovanni Carabali
Summary: This study analyzed the temporal variations of black carbon in Tacna, Peru from November 2019 to September 2021. Ground measurements and NASA's MERRA-2 reanalysis data were used, revealing a significant discrepancy between the two techniques. PAX BC measurements were consistently higher than MERRA-2 BC values, and MERRA-2 did not capture urban pollution events or the BC weekend effect. The most frequent wind direction was from the southwest, and the main sources of contamination were located in the northeast and southeast directions.
Article
Soil Science
Barbara Fuentes, Francisco Gomez, Catalina Valdez, Anael Videla, Juan Castro-Severyn, Sergio Barahona, Roland Bol, Rodrigo Riquelme, Javier Quispe, Francisco Remonsellez
Summary: This study examined the effects of coastal fog on soil properties and microbial diversity in different altitudes of Morro Moreno National Park in Chile. The results showed that coastal fog influences the temperature, humidity, and chemical characteristics of the soil. It also affects the microbial communities, with different microbial groups dominating at different altitudes.
EUROPEAN JOURNAL OF SOIL SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
G. Aguilar, R. Riquelme, P. Lohse, A. Cabre, J. -L. Garcia
Summary: This study revisited the glacial landforms in the Encierro River Valley of the southern Atacama Desert in Chile and provided new detailed geomorphological mapping. The results showed that Late Quaternary glaciers formed multiple moraine arcs and deposits in the valley, and the glacier dynamics were closely related to the climatic changes in the Atacama Desert.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geography, Physical
Sebastian Munoz-Farias, Benedikt Ritter, Tibor J. Dunai, Jorge Morales-Leal, Eduardo Campos, Richard Spikings, Rodrigo Riquelme
Summary: The pediplains in the Atacama Desert are the result of both climate variability and Andean uplift over a period of more than 17 million years. The evolution of the pediplains is characterized by two episodes of alluvial deposition, drainage capture, and incision, influenced by changes in climate conditions and tectonic activity.
Article
Geography, Physical
Juliette Rat, Frederic Mouthereau, Stephanie Brichau, Arnaud Vacherat, Charlotte Fillon, Cecile Gautheron
Summary: The interaction between deep geodynamic processes and surface erosion processes plays a crucial role in controlling the elevation, distribution, and environmental changes of land masses. Geological evidence suggests the existence of a post-orogenic erosion in the Iberian Peninsula around 10 Ma, mainly driven by crustal deformation and base-level change or climate forcing on erosion. The Ebro Basin provides insights into the timing and distribution of erosion, indicating that it occurred between 12 and 6 Ma or around 10 Ma with model uncertainties. The exhumation of the Ebro Basin is consistent with a widespread 10 Ma-exhumation event throughout Iberia, highlighting the importance of lithospheric and sublithospheric processes. The findings also suggest that plate-scale uplift driven by deep-seated processes is the main cause of basin incision, leading to complex tectonic reorganization, environmental changes, and faunal turnover in Iberia.
GLOBAL AND PLANETARY CHANGE
(2022)
Article
Geosciences, Multidisciplinary
Stephanie Duchene, Jean-Luc Severac, Nadege Samalens, Youssef Driouch, Ahmed Ntarmouchant, Leo Kriegsman, Mohamed Dahire, Pierre Debat, Sophie Gouy
Summary: The Permian magmatic rocks from Morocco with crustal xenoliths provide insights into the Late Variscan geological evolution of the deep crust affected by local crustal heating.
JOURNAL OF AFRICAN EARTH SCIENCES
(2022)
Article
Geochemistry & Geophysics
Juraj Butek, Michel Gregoire, Jan Spisiak, Stephanie Duchene, Richard Kopacik
Summary: This study investigates the characteristics and formation processes of rodingites in the Western Carpathians. It found that rodingites primarily consist of vesuvianite, diopside, and hydrated garnet, with high CaO and low SiO2 contents, indicating a high extent of Ca-metasomatism. The study also identified three hydrothermal events, with the first two representing pervasive and intense rodingitization processes, and the third representing late, channeled, fluid circulation. These findings are significant for understanding the impact of fluid compositions and circulation on rock metamorphism.
Article
Geochemistry & Geophysics
Jorge E. Morales-Leal, Eduardo Campos, Kalin Kouzmanov, Rodrigo Riquelme
Summary: This study investigates the mineralogical and geochemical characteristics of the advanced argillic (AA) alteration in the Potrerillos district, Atacama Desert, Chile. The results provide insights into the physicochemical parameters, composition, source, and evolution of the fluids that produced the AA alteration. Different precipitation environments with various sulfur sources and alunite group minerals have been defined. The temperature estimation for the hypogene alteration is 120-200 degrees C.
MINERALIUM DEPOSITA
(2023)
Article
Geosciences, Multidisciplinary
Albert Cabre, Dominique Remy, Odin Marc, Katy Burrows, Sebastien Carretier
Summary: This research shows that the impacts of flash floods on Atacama Desert infrastructures are influenced by the scale of rainfall cells and the drainage area upstream of the channels. This understanding is crucial for disaster mitigation efforts and infrastructure planning.
Article
Geochemistry & Geophysics
Cristopher Lopez, Chiara Del Ventisette, Marco Bonini, Domenico Montanari, Daniele Maestrelli, Fernando Martinez, Rodrigo Gonzalez, Rodrigo Riquelme, Daniela Montenegro, Belen Munoz, Gabriela Guzman-Marusic
Summary: The orogenic growth of the Domeyko Cordillera in northern Chile is caused by positive tectonic inversion. This study validates this interpretation through field data and 2-D reflection seismic profiles. Analog models were used to analyze the relationship between extensional structures, inversion structures, and pure thrust faulting. The study proposes a kinematic model that explains the structural styles observed in the Domeyko Cordillera.
Article
Geosciences, Multidisciplinary
Anne Guyez, Stephane Bonnet, Tony Reimann, Sebastien Carretier, Jakob Wallinga
Summary: This study investigates the quantification of sediment transport and storage in rivers through the analysis of luminescence data and numerical modeling. The analysis reveals similar longitudinal trends in sediment transport and storage along different parts of the rivers. The findings highlight the potential of using single-grain luminescence measurement and modeling approach for quantifying sediment transfer in fluvial systems.
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
(2023)
Article
Geography, Physical
Stephanie Brichau, Cesar Witt, Mauricio A. Bermudez, Charlotte Fillon, Cecile Gautheron, Andrew Carter
Summary: Thermochronometry is used to study Cenozoic magmatism and exhumation in the Chiapas Massif Complex, a region located at the triple junction between the Caribbean, North American and Cocos plates. The research combines various dating methods and numerical modeling, revealing different histories of exhumation in the northern and southern parts of the complex. The uplift pattern supports the 'closing zipper' model, and thermal models also show a Pleistocene decrease in topography.
GLOBAL AND PLANETARY CHANGE
(2023)
Article
Geosciences, Multidisciplinary
Aude Lurin, Odin Marc, Patrick Meunier, Sebastien Carretier
Summary: Channels are formed by erosive processes and impact the water and sediment dynamics of drainage basins. Identifying channel heads is difficult in steep landscapes, and the processes beneath them are not well understood. The CO(2)CHAIN method extracts channels from digital elevation models, and shows better performance than previous methods, providing new insights into the conditions for channel formation and competition between erosive processes.
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
(2023)
Article
Geography, Physical
Remi Bossis, Vincent Regard, Sebastien Carretier
Summary: Long-term coastal erosion is difficult to quantify, but a method has been developed to reconstruct the initial shape of volcanic islands and measure the erosion since their formation. Applying this method to Corvo Island in the Azores archipelago, it was found that the island has lost a significant volume and surface area due to coastal erosion. Additionally, a strong correlation was observed between long-term coastal erosion and the spatial distribution of waves, with smaller and more frequent waves having a greater impact than storm waves.
EARTH SURFACE DYNAMICS
(2023)