Results 31 to 40 of about 6,151 (165)

REE characteristics and geological significance of mudstones from Wenchang Formation in eastern Yangjiang Sag of Pearl River Mouth Basin

open access: yes地质科技通报, 2022
The REE in sedimentary rocks have strange chemical stability and can well record the original sedimentary message.In order to explore the material source, tectonic setting and sedimentary environment of the Wenchang Formation in Eastern Yangjiang Sag ...
Chuang Shi
doaj   +1 more source

Geochemistry and Petrogenesis of Mata Lower Jurassic basaltic rocks, Southeast Kerman, Implication to Southern Sanandaj-Sirjan zone evolution [PDF]

open access: yesپترولوژی, 2019
Lower Jurassic volcanic-sedimentary sequence in the southern end of the Sanandaj-Sirjan zone, north of Mata village (southwest Jiroft), composed of tuffaceous limestone, calcareous tuff, limestone, including felsic volcaniclastic and basaltic volcanic ...
Zahra Badrzadeh
doaj   +1 more source

Reconstruction of tectonic-burial evolution history of Sinian Dengying Formation in Sichuan Basin based on the constraints of in-situ laser ablation U-Pb date and clumped isotopic thermometer(Δ47)

open access: yesShiyou shiyan dizhi, 2021
Reliable evolution curve of tectonic-burial history is essential for the research of the source rock evolution, reservoir formation and hydrocarbon accumulation of target strata of basin.
Anping HU   +5 more
doaj   +1 more source

Tectonic blocks and suture zones of eastern Thailand: evidence from enhanced airborne geophysical analysis

open access: yesAnnals of Geophysics, 2013
Airborne geophysical data were used to analyze the complex structures of eastern Thailand. For visual interpretation, the magnetic data were enhanced by the analytical signal, and we used reduction to the pole (RTP) and vertical derivative (VD) grid ...
Arak Sangsomphong   +3 more
doaj   +1 more source

Fate of the Late Triassic Songpan-Ganzi Basin in the eastern Paleo-Tethys Ocean: Geochemical and geochronological constraints in the NE Tibetan Plateau

open access: yesJournal of Asian Earth Sciences: X
The Songpan-Ganzi Basin in the northeastern Tibetan Plateau preserves well-developed Late Triassic flysch sequences, making it an ideal region for investigating the provenance and tectonic evolution of the basin.
Hong-Xu Mu   +4 more
doaj   +1 more source

Longer aftershocks duration in extensional tectonic settings [PDF]

open access: yesScientific Reports, 2017
AbstractAftershocks number decay through time, depending on several parameters peculiar to each seismogenic regions, including mainshock magnitude, crustal rheology, and stress changes along the fault. However, the exact role of these parameters in controlling the duration of the aftershock sequence is still unknown.
Valerio, E.   +3 more
openaire   +3 more sources

Mineral chemistry and thermobarometry of gabbroic rocks from the Pargeh area (NE Qazvin): A key for understanding the crystallization conditions [PDF]

open access: yesپترولوژی
Introduction Mineral chemistry data as well as petrography provide a comprehensive picture of magma crystallization conditions that support the conclusions based on geochemical data. In addition, the chemical composition of minerals such as clinopyroxene,
Nahid Naseri   +4 more
doaj   +1 more source

Tectonic, depth, and magnitude controls on global earthquake stress drop

open access: yesSolid Earth Sciences
Earthquake stress drop is a key parameter linking fault strength, rupture dynamics, and high-frequency ground motion, yet global observations exhibit variability spanning more than two orders of magnitude.
Antonino D'Alessandro
doaj   +1 more source

Modal composition and tectonic provenance of the sandstones of Ecca Group, Karoo Supergroup in the Eastern Cape Province, South Africa

open access: yesOpen Geosciences, 2017
Petrography of the sandstones of Ecca Group, Karoo Supergroup in the Eastern Cape Province of South Africa have been investigated on composition, provenance and influence of weathering conditions.
Baiyegunhi Christopher   +2 more
doaj   +1 more source

Geochemistry and Tectonic Evolution of Mélange; A case study of Sikait-Abu Rusheid-Nugrus area of Egyptian Neoproterozoic 2 [PDF]

open access: yesDelta Journal of Science
Due to limited exposure and tectonic complexity of the mélange rocks in the Sikait-Abu Rusheid-Nugrus area, their affinities and evolutions are inadequately studied.
Mayada Eldeeb   +4 more
doaj   +1 more source

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