Article
Geochemistry & Geophysics
Simge Oguz-Saka, Faruk Aydin, Orhan Karsli, Abdurrahman Dokuz, Thomas Aiglsperger, Daniel P. Miggins, Cuneyt Sen, Raif Kandemir, Bilal Sari, Anthony A. P. Koppers
Summary: The eastern Blacksea magmatic arc (EBMA) in the eastern Sakarya Zone (ESZ) provides a valuable opportunity to study the birth of an extensional intra-arc and back-arc settings during the Late Cretaceous. The volcanic activity of the EBMA during the Late Cretaceous occurred in two major phases, characterized by a bimodal distribution of rock types. The geochemical and isotopic data suggest that the volcanic rocks in the EBMA were formed through interactions with mantle metasomatized by slab/sediment-derived fluids and lower crustal materials.
Article
Geology
Kurtulus Gunay, Vural Oyan, Cahit Donmez, Bugra Cavdar, Emin Ciftci, Andrey V. Chugaev, Nail Yildirim, Osman Parlak, Esra Yildirim, Lian-Xun Wang, Chang-Qian Ma
Summary: The central part of the Pontide Orogenic Belt in northern Anatolia is a segment of the Alpine-Himalayan orogeny. The Cangaldag Metamorphic Complex (CMC) within this segment is a significant volcanogenic massive sulfide (VMS) deposit with a resource estimate of 7.5 million tons. The mineralization was formed in an ensimatic island arc environment during the Middle Jurassic and belongs to the bimodal-mafic type (Noranda type) of Cu-Zn group.
ORE GEOLOGY REVIEWS
(2022)
Article
Geochemistry & Geophysics
Zhiyu Yi, Yushu Liu, Joseph G. Meert, Tianyue Wang, Baochun Huang
Summary: Paleomagnetic and geochronological data from late Triassic dykes and sills in North China suggest that the East Asian blocks were further north and merged with Pangea earlier than previously thought. This updated reconstruction of Pangea's paleogeography is compatible with a zonal climate model, eliminating the need for the Pangean mega-monsoon hypothesis.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geochemistry & Geophysics
Manuela Duran Oreja, Pablo Calvin, Juan Jose Villalain, Puy Ayarza, Jose R. Martinez Catalan
Summary: This study presents a magnetic and paleomagnetic analysis of weakly metamorphic Cambrian limestones from the southern limb of the Central Iberian Arc. The results reveal a characteristic paleomagnetic component indicating acquisition during a normal polarity event prior to the Kiaman superchron. The study also provides insights into the tectonic history of the region, including clockwise rotation during the late Carboniferous and counterclockwise rotation related to the formation of the Ibero-Armorican Arc.
Letter
Plant Sciences
Bilge Tunckol, Ihsan A. Al-Shehbaz
Summary: Aubrieta amasya is a newly discovered plant species from Amasya Province in northern Turkey. It is distinguished from its closest relatives, A. anamasica and A. pinardii, by its veinless fruits and longer styles.
Article
Geochemistry & Geophysics
Pei-Ru Jian, Wen-Tzong Liang, Ban-Yuan Kuo
Summary: The Luzon Arc, carried by the Philippine Sea Plate and converging with the Eurasian Plate, is colliding obliquely and adding to the Eurasian continental margin to form the Taiwan orogen. The northern segment of the Luzon Arc is subducted under the Ryukyu Trench. However, how this segment responds to collision and subduction is not well understood. In this study, a three-dimensional spatial clustering approach in eastern Taiwan was employed to investigate the variation of stress along the collision suture. The results show that the stress regime in the northern crustal segment of the Luzon Arc undergoes rotation and tilting, likely influenced by the oblique subduction and bending of the Central Range crustal block.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
William W. Sager, Claire Carvallo
Summary: The Philippine Sea plate is a part of the east Asian plate mosaic, and its past motions can only be determined from paleomagnetic data. The International Ocean Discovery Program (IODP) Expedition 352 studied the Izu-Bonin forearc, and found that the paleolatitude of the area was on the equator with a northward drift of approximately 28°, consistent with other forearc sites of similar age. Additionally, some samples in the cored sections were remagnetized after approximately 30 million years, suggesting an unknown tectonic event.
Article
Geography, Physical
Zaijun Li, Fei Wang, Chongwen Luo, Chengying Liu, Xin Wang, Shengli Yang, Ramamoorthy Ayyamperumal, Junhui Zhang, Baofeng Li, Yuxin Fan
Summary: This study presents the results of a chronological and paleo-environmental study of the largest lake basin in the Tengger Desert. The findings suggest that the desert has undergone aridification since approximately 500,000 years ago, caused by changes in summer monsoon precipitation and higher potential evapotranspiration during warmer interglacial periods after the Mid-Brunhes Event. This research provides geological evidence for the aridification of deserts in the East Asian Summer Monsoon margin under global warming.
QUATERNARY SCIENCE REVIEWS
(2022)
Article
Geochemistry & Geophysics
Douglas G. Beaver, Dennis Kent, Ian W. D. Dalziel
Summary: Paleomagnetic analysis of South Georgia suggests a 27.2-degree counterclockwise rotation and a 10.5-degree northward tilting since the Late Cretaceous, supporting the idea that South Georgia is a continuation of the Rocas Verdes marginal basin system.
Article
Geosciences, Multidisciplinary
Ozgur Bilici
Summary: This study examines the harzburgite-dunite suite in the Kirdag ophiolite in Turkey and provides evidence for mantle processes and geotectonic implications. The textural, mineral and whole-rock geochemical properties reveal melting and melt-peridotite interaction processes, as well as the origin of the suite from a depleted mantle with high-degree partial melting. The study also suggests the occurrence of reaction between boninitic melt and harzburgite in the supra-subduction zone.
JOURNAL OF AFRICAN EARTH SCIENCES
(2022)
Article
Agriculture, Multidisciplinary
E. Ebru Tuna, D. Duygu Kilic, H. Guray Kutbay, B. Surmen, H. Mete Dogan
Summary: This study analyzed the contents of heavy metals in five Brassicaceae species grown in different locations in Turkey. The results showed variations in heavy metal deposition characteristics among the species. Lepidium draba, Capsella bursa-pastoris, and Sisymbrium loeselii were identified as suitable plants for biomonitoring studies based on their accumulation of specific heavy metals.
JOURNAL OF AGRICULTURAL SCIENCE AND TECHNOLOGY
(2022)
Article
Geochemistry & Geophysics
Nicholas L. Swanson-Hysell, Margaret S. Avery, Yiming Zhang, Eben B. Hodgin, Robert J. Sherwood, Francisco E. Apen, Terrence J. Boerboom, C. Brenhin Keller, John M. Cottle
Summary: By studying the paleomagnetic pole of the new Superior province after the ca. 1.83 Ga Trans-Hudson orogeny, researchers confirmed the coherency of Laurentia following this orogeny. The findings also provide an explanation for the discrepancies in pole positions between these provinces.
Article
Geochemistry & Geophysics
Yener Eyuboglu, Francis O. Dudas, Di-Cheng Zhu, Ze Liu, Nilanjan Chatterjee, Kubra Akbulut, Liang-Liang Zhang, Shi-Min Li
Summary: The study focuses on hypabyssal intrusives and xenoliths in the Late Cretaceous to Early Paleocene period in northeastern Turkey, detailing their major and trace element compositions, zircon U-Pb ages, and mineral compositions. The host rocks and xenoliths show similarities and differences in terms of their geochemical signatures, which provide insights into the magmatic processes in the study area.
Article
Geochemistry & Geophysics
J. B. Ruh, L. Valero, M. Najafi, N. Etemad-Saeed, J. Vouga, A. Mohammadi, F. Landtwing, M. Guillong, M. Cobianchi, N. Mancin
Summary: This study presents the magnetostratigraphic section and U-Pb zircon ages of the Karvandar Basin, revealing a depositional age of approximately 24-17 Ma and the Makran volcanic arc as the source of the clastic sequence. The results provide new constraints on the initiation of arc volcanism related to the Makran subduction zone.
Article
Geology
Amr A. Metwally, Islam El -Sheikh, Kamel H. Mahfouz
Summary: The K-Pg boundary interval at Gabal Aras in the Qena region was studied to understand the sea water conditions during the Cretaceous-Paleogene transition. The results showed moderately oxygenated bottom sea waters with oligo-mesotrophic conditions during the late Maastrichtian, and a decrease in food supply during the early Danian. The surface water conditions experienced a general cooling trend with a warming episode during the Late Maastrichtian.
CRETACEOUS RESEARCH
(2023)
Article
Geology
Timur Ustaomer, Petek Ayda Ustaomer, Alastair H. F. Robertson, Axel Gerdes
INTERNATIONAL GEOLOGY REVIEW
(2020)
Article
Materials Science, Multidisciplinary
Philipp Lemal, Sandor Balog, Liliane Ackermann-Hirschi, Patricia Taladriz-Blanco, Ann M. Hirt, Barbara Rothen-Rutishauser, Marco Lattuada, Alke Petri-Fink
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2020)
Article
Multidisciplinary Sciences
Hongri Gu, Quentin Boehler, Haoyang Cui, Eleonora Secchi, Giovanni Savorana, Carmela De Marco, Simone Gervasoni, Quentin Peyron, Tian-Yun Huang, Salvador Pane, Ann M. Hirt, Daniel Ahmed, Bradley J. Nelson
NATURE COMMUNICATIONS
(2020)
Article
Geochemistry & Geophysics
Pengfei Liu, Simone Gervasoni, Claudio Madonna, Hongri Gu, Andrea Coppo, Salvador Pane, Ann M. Hirt
EARTH AND PLANETARY SCIENCE LETTERS
(2020)
Article
Geochemistry & Geophysics
Andrea R. Biedermann, Mike Jackson, Martin Chadima, Ann M. Hirt, Joshua M. Feinberg
GEOPHYSICAL JOURNAL INTERNATIONAL
(2020)
Article
Multidisciplinary Sciences
Erik Poloni, Florian Bouville, Christopher H. Dreimol, Tobias P. Niebel, Thomas Weber, Andrea R. Biedermann, Ann M. Hirt, Andre R. Studart
Summary: The use of iron as the mortar phase in nacre-like composites leads to high fracture toughness and stiffness, as well as unique magnetic, electrical, and thermal functionalities. These metal-ceramic composites demonstrate outstanding fracture resistance, magnetization, and the ability for fast induction heating, making them potentially useful in transport, aerospace, and robotic applications requiring weight minimization combined with specific functionalities.
SCIENTIFIC REPORTS
(2021)
Article
Physics, Multidisciplinary
B. Acharya, J. Alexandre, P. Benes, B. Bergmann, J. Bernabeu, A. Bevan, H. Branzas, P. Burian, M. Campbell, S. Cecchini, Y. M. Cho, M. de Montigny, A. De Roeck, J. R. Ellis, M. El Sawy, M. Fairbairn, D. Felea, M. Frank, J. Hays, A. M. Hirt, J. Janecek, M. Kalliokoski, A. Korzenev, D. H. Lacarrere, C. Leroy, G. Levi, A. Lionti, J. Mamuzic, A. Maulik, A. Margiotta, N. Mauri, N. E. Mavromatos, P. Mermod, M. Mieskolainen, L. Millward, V. A. Mitsou, R. Orava, I Ostrovskiy, P-P Ouimet, J. Papavassiliou, B. Parker, L. Patrizii, G. E. Pavalas, J. L. Pinfold, L. A. Popa, V Popa, M. Pozzato, S. Pospisil, A. Rajantie, R. Ruiz de Austri, Z. Sahnoun, M. Sakellariadou, A. Santra, S. Sarkar, G. Semenoff, A. Shaa, G. Sirri, K. Sliwa, R. Soluk, M. Spurio, M. Staelens, M. Suk, M. Tenti, V Togo, J. A. Tuszynski, A. Upreti, V. Vento, O. Vives, A. Wall
Summary: The MoEDAL trapping detector is made up of approximately 800 kg of aluminum volumes and was exposed to proton-proton collisions during run 2 of the LHCb program. Evidence for particles with electric and magnetic charge in the trapping detector was sought using a superconducting quantum interference device (SQUID) magnetometer. By excluding dyons and monopoles within certain charge and mass ranges, the study provides important insights into the characteristics of these particles.
PHYSICAL REVIEW LETTERS
(2021)
Article
Geosciences, Multidisciplinary
Ann M. Hirt, Pengfei Liu
Summary: This study aims to evaluate three methods to estimate the relative proportion of SP and SSD particle content in materials, including the Day-Dunlop plot, FORC, and PCA, as well as the relationship between reversible and irreversible magnetization. The results show that these methods have differences in their ability to detect SP particles in different size ranges.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geochemistry & Geophysics
Gulten Aktas, Z. Mumtaz Hisarli, A. Sinan Demirel
Summary: This study analyzed the tectonic elements and seismic faults around Lake Iznik using marine magnetic data and other geophysical data, revealing the tectonic evolution of the region. The research found significant linear structural trends around the lake, which were correlated with seismic data and faults. The lake was connected to Gemlik Bay and the Marmara Sea approximately 10 million years ago, and a fault disconnected it from Gemlik Bay between the Pleistocene and Holocene epochs.
MARINE GEOPHYSICAL RESEARCH
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Jan Klohs, Ann M. Hirt
Summary: The study compared the magnetic susceptibility and water content of fresh and chemically fixed mouse tissue, revealing heart tissue to be more diamagnetic than other tissues. Fixed tissue showed less diamagnetic susceptibility compared to fresh tissue, with no consistent change in water content.
PHYSICA MEDICA-EUROPEAN JOURNAL OF MEDICAL PHYSICS
(2021)
Article
Multidisciplinary Sciences
B. Acharya, J. Alexandre, P. Benes, B. Bergmann, S. Bertolucci, A. Bevan, H. Branzas, P. Burian, M. Campbell, Y. M. Cho, M. de Montigny, A. De Roeck, J. R. Ellis, M. El Sawy, M. Fairbairn, D. Felea, M. Frank, O. Gould, J. Hays, A. M. Hirt, D. L-J Ho, P. Q. Hung, J. Janecek, M. Kalliokoski, A. Korzenev, D. H. Lacarrere, C. Leroy, G. Levi, A. Lionti, A. Maulik, A. Margiotta, N. Mauri, N. E. Mavromatos, P. Mermod, L. Millward, V. A. Mitsou, I Ostrovskiy, P-P Ouimet, J. Papavassiliou, B. Parker, L. Patrizii, G. E. Pavalas, J. L. Pinfold, L. A. Popa, V Popa, M. Pozzato, S. Pospisil, A. Rajantie, R. Ruiz de Austri, Z. Sahnoun, M. Sakellariadou, A. Santra, S. Sarkar, G. Semenoff, A. Shaa, G. Sirri, K. Sliwa, R. Soluk, M. Spurio, M. Staelens, M. Suk, M. Tenti, V Togo, J. A. Tuszyn'ski, A. Upreti, V. Vento, O. Vives
Summary: Magnetic monopoles, hypothetical fundamental particles, are searched for via the Schwinger mechanism in lead-lead heavy ion collisions. The MoEDAL experiment used trapping detectors and SQUID magnetometers to exclude the existence of magnetic monopoles with specific masses and charges.
Article
Geochemistry & Geophysics
Pengfei Liu, Sanja Panovska, Keke Zhang, Ann M. Hirt
Summary: Lacustrine and marine sediments are important sources of information for constructing Holocene global geomagnetic field models. The question of whether sediment compaction leads to biasing of inclination is evaluated using the Elongation/Inclination (E/I) method on 78 sedimentary records worldwide, with 20 records indicating flattening. The results suggest that shallow inclination may not only result from compaction but may reflect the structure of the geomagnetic field on short timescales, indicating that secular variation is not averaged out over the Holocene.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Geosciences, Multidisciplinary
PengFei Liu, Yi Jiang, Qing Yan, Ann M. Hirt
Summary: The Earth's lithosphere consists of the crust and outermost mantle and it generates a magnetic field with various anomalies. Surface and satellite measurements have improved our understanding of the Earth's magnetic environment. The MSS-1 mission at a low inclination orbit will provide valuable information on compositional variations and large-scale geological structures in the lithosphere.
EARTH AND PLANETARY PHYSICS
(2023)
Article
Mineralogy
Vahid Ahadnejad, Michael S. Krzemnicki, Ann Marie Hirt
Summary: Demantoid from Kerman Province in south-east Iran was analyzed using multiple techniques, including microscopy, spectroscopy, chemical analysis, and magnetic susceptibility measurements. The findings indicate that the samples have spectroscopic and chemical properties consistent with demantoid from serpentinite host rock. The colors of the samples range from yellowish green to deep green, depending on the levels of Cr and Fe, which also contribute to their paramagnetic susceptibility. The Iranian demantoid samples have relatively high concentrations of trace elements Cr, Ge, Ni, and Co, distinguishing them from stones of other localities.
JOURNAL OF GEMMOLOGY
(2022)
Article
Physics, Particles & Fields
B. Acharya, J. Alexandre, P. Benes, B. Bergmann, S. Bertolucci, A. Bevan, R. Bhattacharyya, H. Branzas, P. Burian, M. Campbell, S. Cecchini, Y. M. Cho, M. de Montigny, A. De Roeck, J. R. Ellis, M. ElSawy, M. Fairbairn, D. Felea, M. Frank, J. Hays, A. M. Hirt, P. Q. Hung, J. Janecek, M. Kalliokoski, A. Korzenev, D. H. Lacarrere, C. Leroy, G. Levi, A. Lionti, A. Margiotta, R. Maselek, A. Maulik, N. Mauri, N. E. Mavromatos, E. Musumeci, M. Mieskolainen, L. Millward, V. A. Mitsou, R. Orava, I Ostrovskiy, P-P Ouimet, J. Papavassiliou, B. Parker, L. Patrizii, G. E. Pavalas, J. L. Pinfold, L. A. Popa, V Popa, M. Pozzato, S. Pospisil, A. Rajantie, R. Ruiz de Austri, Z. Sahnoun, M. Sakellariadou, K. Sakurai, A. Santra, S. Sarkar, G. Semenoff, A. Shaa, G. Sirri, K. Sliwa, R. Soluk, M. Spurio, M. Staelens, M. Suk, M. Tenti, V Togo, A. Upreti, V. Vento, O. Vives
Summary: This study presents a search for highly electrically charged objects and magnetic monopoles using data collected by the MoEDAL detector at the LHC. The results provide constraints on the properties of these objects, such as their mass and charge.
EUROPEAN PHYSICAL JOURNAL C
(2022)
