Results 21 to 30 of about 5,887 (268)

Discriminating Tectonic Setting of Igneous Rocks Using Biotite Major Element chemistry−A Machine Learning Approach

Geochemistry, Geophysics, Geosystems, 2021
The composition of igneous biotite is a potential indicator of the geologic environment of its host rock. Here, we apply two machine learning models−eXtreemly Greedy tree Boosting (XGBoost) and light gradient boosting machine (LightGBM) to classify ...
Rupashree Saha, Dewashish Upadhyay, Biswajit Mishra   +2 more
doaj   +1 more source

Petrological and geochemical constraints on tectonic settings of the Late Carboniferous-Early Permian, Central Junggar, China

Journal of Natural Gas Geoscience, 2020
It is assumed that the central part of Junggar underwent continuous deposition from the Mesozoic to Cenozoic, but few data are available from deep well to support this hypothesis.
Shuncun Zhang, Shengyin Zhang, Linhao Fang, Xinchuan Lu, Hui Guo, Ji'an Shi   +5 more
doaj   +1 more source

Triassic magmatism and tectonic setting of Eastern Tianshan, NW China: constraints from the geochemistry and zircon U–Pb–Hf isotopes of granitoids in the Yamansu area

Frontiers in Earth Science, 2023
Introduction: To provide constraints on the Triassic tectonic setting of Eastern Tianshan, an integrated study was conducted on the geochronological and geochemical data for granodiorites, monzogranites, and two-mica granites from the Yamansu area on the
Hongming Cai, Hongming Cai, Hongming Cai, Xiangkuan Gong, Guiping Liu, Ruiqing Guo, Keyong Wang   +6 more
doaj   +1 more source

Provenance and Tectonic Setting of Formation of Quaternary Sedimentary Successions from the Songhua River, Northeast China

Applied Sciences, 2022
Drilling has been conducted to investigate the petrogeochemistry of the Late Pleistocene Guxiangtun Formation and Holocene Wenquanhe Formation in Northeast China.
Wenguang Kan, Zailin Yang, Liangliang Yu, Menghan Sun   +3 more
doaj   +1 more source

Provenance and tectonic setting of the Lower Jurassic-Lower Cretaceous shales from the northeastern Iraq: mineralogical and geochemical approaches

Frontiers in Earth Science
The Lower Jurassic-Lower Cretaceous successions from the Ranya and Warte areas in the northeastern Iraq were investigated to determine the provenance and tectonic setting.
Nagham Omar, Tom McCann, Ali I. Al-Juboury, Mohammed A. Al-Haj, Arkan O. Sharazwri, John S. Armstrong-Altrin   +5 more
doaj   +1 more source

Geochemistry of sandstones and shales from the Ecca Group, Karoo Supergroup, in the Eastern Cape Province of South Africa: Implications for provenance, weathering and tectonic setting

Open Geosciences, 2017
Geochemical compositions of twenty-four sandstone and shale samples from the Ecca Group were analysed to decipher their provenance, paleoweathering conditions and tectonic setting. The shales have high Fe2O3, K2O, TiO2, Ce, Cu, Ga, La, Nb, Nd, Rb, Sc, Sr,
Baiyegunhi Christopher, Liu Kuiwu, Gwavava Oswald   +2 more
doaj   +1 more source

Longer aftershocks duration in extensional tectonic settings [PDF]

Scientific 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., Tizzani, P., Carminati, E., Doglioni, C.   +3 more
openaire   +3 more sources

Palaeomagnetism and tectonics of Middle America and adjacent regions. Part 2

Geofísica Internacional, 1983
This issue presents the second part of a special collection of papers concerned with recent palaeomagnetic and tectonic investigations of Mexico. It contains a total of four papers, written by four authors from four different institutions.
Jaime Urrutia Fucugauchi
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)

Shiyou 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, Anjiang SHEN, Yana CHEN, Jianyong ZHANG, Feng LIANG, Yongsheng WANG   +5 more
doaj   +1 more source

Geochemical (REE and Trace elements) characteristics and tectonic setting discrimination of Permo-Carboniferous sandstone from Sikkim Lesser Himalaya, NE India

Russian Journal of Earth Sciences, 2022
The geochemical (REE & traces elements) characteristics of Permo-Carboniferous sandstone has been taken into account to decipher tectonic setting and provenance of the Rangit Pebble Slate Formation of Sikkim Lesser Himalaya.
Priya Raj Kumar, Tewari V., Ranjan R. K.
doaj   +1 more source