Results 51 to 60 of about 51,740 (216)

Petrogenesis and Tectonic Setting of Late Mesozoic Felsic Magmatic Rocks in the Wangmushan Mining District, Northern Fujian, South China

Geological Journal, EarlyView.
The rhyolitic ignimbrite and K‐feldspar granite porphyry from the Wangmushan mining district, northern Fujian yield ages of 173.8 ± 0.8 and 102.6 ± 0.4 Ma, respectively. Geochemical data, zircon trace elements, whole‐rock Sr–Nd–Pb isotope data, and zircon Hf isotopic compositions indicate that the rhyolitic ignimbrite originated from partial remelting ...
Wei Shaogang, Hong Wentao, Xiao Fan, Jin Guodong, Shi Hongyang, Ma Zhiwang, Wu Chen, Xue Yujingyang   +7 more
wiley   +1 more source

Light Mo Isotopes of Post‐Collisional Ultrapotassic Rocks in Southern Tibet Derived From Subducted Indian Continental Crust

Geochemistry, Geophysics, Geosystems, 2023
Recycling of molybdenum isotopes in continental subduction zones remains debated. In this contribution, we re‐visit the Mo isotope compositions of the Sailipu post‐collisional ultrapotassic rocks in the Himalaya‐southern Tibet orogen. These ultrapotassic
Miao‐Yan Zhang, Cheng‐Cheng Huang, Lu‐Lu Hao, Yue Qi, Qiang Wang, Andrew C. Kerr, Gang‐Jian Wei, Jie Li, Jin‐Long Ma, Lin Ma, Jing‐Jing Fan   +10 more
doaj   +1 more source

Salt Range Formation of Pakistan Preserves Unique Record of Volcanic Fertilization During the Ediacaran Shuram Excursion

Terra Nova, EarlyView.
ABSTRACT Thin, discontinuous, organic‐rich oil shale beds in the siliciclastic‐evaporitic Salt Range Formation (SRF) of Pakistan are of approximate Neoproterozoic to Cambrian age based on stratigraphic constraints. The beds are enriched (26–43 wt.% total organic carbon, TOC) in aliphatic organic matter (OM) of low thermal maturity despite their ...
Paul C. Hackley, Ryan J. McAleer, Jay M. Thompson, Brett J. Valentine, Imran Khan   +4 more
wiley   +1 more source

Crustal strength control on structures and metamorphism in collisional orogens [PDF]

Tectonophysics, 2018
Abstract Although the upper crust is the most accessible among other crustal units, so far little attention was paid about its role on the continental collision style and on exhumation processes of metamorphic rocks. With this respect, several 2D thermo-mechanical numerical experiments of post-subduction continental collision were performed, which ...
Andrea Piccolo, Manuele Faccenda, Rodolfo Carosi, Chiara Montomoli, Dario Visonà   +4 more
openaire   +2 more sources

U–Pb Dating of Cambrian Magmatism in the Pinerolo‐Sanfront Unit, Dora‐Maira Massif (Western Alps)

Terra Nova, EarlyView.
ABSTRACT The Pinerolo‐Sanfront Unit (PSU), the structurally lowest tectonic unit of the Dora‐Maira Massif (Western Alps), has been regarded as a monocyclic unit composed of Permo‐Carboniferous sediments and Permian granitoids that were metamorphosed during the Alpine orogeny.
Francesco De Cesari, Davide Dana, Salvatore Iaccarino, Chiara Montomoli, Alberto Corno, Daniela Rubatto, Rodolfo Carosi   +6 more
wiley   +1 more source

Multi‐Mineral Geochronology Across the Neoproterozoic Brasília Nappe Stack: Constraints on Thermal Resetting and Metamorphic Architecture

Terra Nova, EarlyView.
ABSTRACT The Southern Brasília Orogen formed during Western Gondwana's final assembly and comprises nappe systems piled against the São Francisco Craton. We present new rutile U–Pb ages from the lowermost Canastra Group (> 2.2 Ga) and the uppermost Carrancas Group (~560 Ma), integrated with published zircon, monazite, garnet, and mica ages from the ...
Rodrigo Irineu Cerri, Alex J. Choupina A. Silva, Tamiris Pagotti Gonçalves Pinto, Rodrigo Prudente de Melo, George Luiz Luvizotto, Regiane Andrade Fumes, Fabrício de Andrade Caxito, Renato Moraes   +7 more
wiley   +1 more source

Multi‐Stage Crustal Thickening, Surface Uplift, and Collision in the Western Himalaya‐Karakoram‐Tibet Orogen Revealed by Chemical Mohometry

Geochemistry, Geophysics, Geosystems
The Himalaya‐Karakoram‐Tibet (HKT) orogen provides an unrivaled opportunity to study the dynamic linkages between deep and surface processes during collisional orogenesis.
Ian W. Hillenbrand, Victor E. Guevara
doaj   +1 more source

Tectonic evolution of the Chinese Tianshan Orogen from subduction to arc-continent collision: Insight from polyphase deformation along the Gangou section, Central Asia

, 2020
The Central Asian Orogenic Belt, as the largest accretionary orogen on Earth, is an ideal candidate to study the geodynamics of convergent plate boundaries through a prolonged period.
Yunying, Zhang, Li, P, Jiang, Y, Rosenbaum, G, Jourdan, F, Jiang, Yingde, Sun, M, Xia, X, Zhang, Y, Zhang, Yunying, Rosenbaum, Gideon, Cai, Keda, Yuan, Chao, Cai, K, Sun, Min, Yaun, C, Jourdan, Fred, Li, Pengfei, Xia, Xiaoping   +18 more
core   +1 more source

THE AGE OF EARLY COLLISIONAL GRANITOIDS OF WESTERN SANGILEN (SE TUVA): IMPLICATIONS FOR ESTIMATING THE DURATION OF OROGENY AT THE MARGIN OF THE TUVA-MONGOLIAN MASSIF

Геодинамика и тектонофизика
The first U-Pb isotope-geochronological data were obtained on the age of early collisional granitoids of the Matut massif (Western Sangilen, SE Tuva).
D. V. Semenova, V. G. Vladimirov, I. V. Karmysheva, V. A. Yakovlev   +3 more
doaj   +1 more source

Provenance of the Middle‐Upper Triassic Songpan‐Ganzi Flysch of Western China Revealed by Anisotropy of Magnetic Susceptibility Measurements: Implications for the Tectonic‐Paleogeographic Evolution of the Paleo‐Tethys Ocean

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 10, October 2026.
Abstract The Triassic Songpan‐Ganzi turbidite complex (SGC) on the eastern Tibetan plateau is one of the largest flysch turbiditic complexes on Earth. However, the provenance of its extremely thick turbidites is hotly debated. We conducted the measurement of anisotropy of magnetic susceptibility (AMS) of Triassic turbidites from nine profiles in Ruo ...
Yuhan Yang, Yong Cao, Xiaozhou Ye, Zhenyu Yang, Zhiming Sun, Haibing Li   +5 more
wiley   +1 more source