Results 61 to 70 of about 45,915 (265)

Notable Impact of Paleotectonic Stress on Gold Mineralisation in the West Qinling Orogen

Geological Journal, EarlyView.
By applying fuzzy clustering and multiple inverse methods, we systematically processed the data of vein and fault slip in this ore deposit to reveal the transition of orogenic geological environment and paleotectonic stress field. Our research results show two different stress states: the northwest–southeast extensional stress field and the northeast ...
Hongyan Wang, Aibing Chen, Jian Yang, Yuan Zhang   +3 more
wiley   +1 more source

Continental Delamination Initiates Subduction and Supercontinent Breakup

, 2023
Abstract Subduction is a fundamental process that drives plate tectonics1, 2 and supercontinent cycles3-5. The separation of a supercontinent requires the initiation of new subduction zones along its passive margins, evidenced in the appearance and increase in global continental arc volcanism6, 7 during the breakup of Pangea and Rodinia ...
Zebin Cao, Lijun Liu
openaire   +1 more source

Two-sided asymmetric subduction; implications for tectonomagmatic and metallogenic evolution of the Lut Block, Eastern Iran [PDF]

, 2011
West directed subduction zones show common characteristics, such as low structural elevation, deep trench, steep slab and a conjugate back-arc basin that are opposite to those of the east directed subduction zones.
Arjmandzadeh, R., Homam, S. M., Karimpour, M. H., Mazaheri, S. A., Medina, J. M., Santos, J. F.   +5 more
core   +2 more sources

Response of Remote Tropical West Pacific Islands to Climate Variability: A Multiproxy Record From T‐Lake, Palau, Spanning the Early Holocene to Present

Archaeometry, EarlyView.
ABSTRACT Lake sediments are natural archives of past environmental dynamics and how these systems have responded to past climate variability. Sediment geochemistry, governed by local geology and climate processes, is unique to each lake‐catchment and geochemical proxies must be validated for each study site.
Jalene Nalbant, Larissa Schneider, Jessica L. Blois, Matthew Wolhowe, Julian P. Sachs, Simon G. Haberle, Geoffrey Clark   +6 more
wiley   +1 more source

The return of subducted continental crust in Samoan lavas [PDF]

Nature, 2007
Substantial quantities of terrigenous sediments are known to enter the mantle at subduction zones, but little is known about their fate in the mantle. Subducted sediment may be entrained in buoyantly upwelling plumes and returned to the Earth's surface at hotspots, but the proportion of recycled sediment in the mantle is small, and clear examples of ...
Matthew G, Jackson, Stanley R, Hart, Anthony A P, Koppers, Hubert, Staudigel, Jasper, Konter, Jerzy, Blusztajn, Mark, Kurz, Jamie A, Russell   +7 more
openaire   +2 more sources

A Common Reference Material for Mass‐Dependent Sn Isotope Compositions: An Inter‐Laboratory Calibration Approach

Geostandards and Geoanalytical Research, EarlyView.
Key Points We recommend using the notation δ122/118SnNIST SRM 3161a for mass‐dependent Sn isotope data. We derived conversion factors relative to NIST SRM 3161a for Puri Sn CEZA (0.132 ± 0.011‰), Sn Lyon (0.229 ± 0.016‰), Sn IPGP (0.162 ± 0.018‰). Tin isotope compositions are presented for SPEX CertiPrep Sn and nine USGS reference materials.
Aurélia C.E. Meister, Manuela A. Fehr, Quentin Amet, Gerhard Brügmann, Caroline Fitoussi, Matthias Friebel, Weiqiang Li, Frederic Moynier, Jia‐Xin She, Xueying Wang, Maria Schönbächler   +10 more
wiley   +1 more source

The Deep Structure of the Alps Based on the CIFALPS Seismic Experiment: A Synthesis

Geochemistry, Geophysics, Geosystems, 2021
The European Alps are the site where classic geologic concepts such as nappe theory, continental subduction and slab breakoff have been first proposed.
M. G. Malusà, S. Guillot, L. Zhao, A. Paul, S. Solarino, T. Dumont, S. Schwartz, C. Aubert, P. Baccheschi, E. Eva, Y. Lu, C. Lyu, S. Pondrelli, S. Salimbeni, W. Sun, H. Yuan   +15 more
doaj   +1 more source

Tectonic evolution of a continental collision zone: A thermomechanical numerical model [PDF]

, 2004
We model evolution of a continent-continent collision and draw some parallels with the tectonic evolution of the Himalaya. We use a large-scale visco-plasto-elastic thermomechanical model that has a free upper surface, accounts for erosion and deposition
Avouac, J.-P., Burov, E., Toussaint, G.
core  

Coesite Discovery in Eclogites Confirms UHP Metamorphism in the Orlica‐Śnieżnik Dome (SW Poland)

Journal of Metamorphic Geology, EarlyView.
ABSTRACT Eclogite lenses are exposed within the orthogneiss‐dominated core of the Orlica‐Śnieżnik Dome in the Sudetes, which forms the northeastern margin of the Bohemian Massif (Variscan Belt of Central Europe). The presence of coesite inclusions in garnet and omphacite confirms that these eclogites underwent ultrahigh‐pressure metamorphism.
Małgorzata Nowak, Lucie Tajčmanová, Marcin Dąbrowski, Iris Buisman, Jacek Szczepański   +4 more
wiley   +1 more source

Compression-extension transition of continental crust in a subduction zone: A parametric numerical modeling study with implications on Mesozoic-Cenozoic tectonic evolution of the Cathaysia Block. [PDF]

PLoS ONE, 2017
The Cathaysia Block is located in southeastern part of South China, which situates in the west Pacific subduction zone. It is thought to have undergone a compression-extension transition of the continental crust during Mesozoic-Cenozoic during the ...
Xuran Zuo, Lung Sang Chan, Jian-Feng Gao
doaj   +1 more source