Results 71 to 80 of about 100,457 (323)

Geochemistry and petrogenesis of the Kolah-Ghazi granitoid assemblage, south of Esfahan

Journal of Economic Geology, 2018
Introduction The Kolah-Ghazi granitoid assemblage is located in the south of Esfahan and in the Sanandaj-Sirjan magmatic-metamorphic zone. The Sanandaj-Sirjan zone is extended for 1500 km from Sirjan in the southeast to Sanandaj in the northwest of Iran
Jamshid Ahmadian, Hajar Gholamian, Ali Khan Nasr Esfahani, Maryam Honarmand   +3 more
doaj   +1 more source

High Abundances of Presolar Grains and $^{15}$N-rich Organic Matter in CO3.0 Chondrite Dominion Range 08006 [PDF]

, 2018
NanoSIMS C-, N-, and O-isotopic mapping of matrix in CO3.0 chondrite Dominion Range (DOM) 08006 revealed it to have in its matrix the highest abundance of presolar O-rich grains (257 +76 / -96 ppm, 2$\sigma$) of any meteorite. It also has a matrix abundance of presolar SiC of 35 (+25 / -17, 2$\sigma$) ppm, similar to that seen across primitive ...
arxiv   +1 more source

Health and Ecological Risk From Potentially Toxic Elements in Soils and Extra Virgin Olive Oils From Valdichiana Senese, Tuscany (Italy)

Journal of Plant Nutrition and Soil Science, EarlyView.
ABSTRACT Background Extra virgin olive oils (EVOOs) are widely consumed but rarely analysed for potentially toxic elements (PTEs), whose concentrations in EVOOs can be significantly influenced by contamination in olive grove soils. As food consumption is the main PTE accumulation pathway in humans, thorough investigation on EVOOs is necessary.
Martina Grattacaso, Giulia Canali, Andrea Vannini, Giuseppe Protano, Francesco Nannoni, Vivien De Lucia, Luigi Antonello Di Lella, Stefano Biagiotti, Stefano Loppi   +8 more
wiley   +1 more source

A Poromechanical Framework for Internal Interactions Induced by Solid Inclusions

International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT The framework of poromechanics is generalized to simulate the multiscale behavior of porous media subjected to internal loadings stemming from the growth of solid inclusions. This generalization is designed to enable the study of anisotropic internal stress generation from solid growth within the pores, while recovering isotropic fluid‐induced
Yifan Yang, Giuseppe Buscarnera
wiley   +1 more source

Investigation of Antimony mineralization and mass transfer in host rocks, Baout, west of Zahedan (southeast of Iran)

Journal of Economic Geology, 2021
Introduction The Baout antimony deposit is located 80 km west of Zahedan. Antimony occurs as a trace element in Earth crust, introduced in many minerals, especially sulfides and sulfosalts and occurs as small high grade ore deposits in different parts ...
Halimeh Mojadadi Moghadam, Mohammad Boomeri, Habib Biabangard   +2 more
doaj   +1 more source

Metamorphic Inheritance, Lower‐Crustal Earthquakes, and Continental Rifting

Geochemistry, Geophysics, Geosystems
The Malawi Rift is localized within Precambrian amphibolite‐granulite facies metamorphic belts, bounded by up to 150 km long border faults, and generates earthquakes throughout ∼40 km thick crust.
Å. Fagereng, J. F. A. Diener, C. J. Tulley, B. Manda   +3 more
doaj   +1 more source

Near-mid infrared spectroscopy of carbonaceous chondrites: Insights into spectral variation due to aqueous alteration and thermal metamorphism in asteroids [PDF]

Icarus, Volume 411, 2024, 115951, ISSN 0019-1035,
Carbonaceous chondrites (CCs) are windows into the early Solar system and the histories of their parent bodies. Their infrared spectral signatures are powerful proxies for deciphering their composition and evolution history, but still present formidable challenges.
arxiv   +1 more source

Petrogenesis of the paleoproterozoic ultramafites in Wuchuan area, Inner Mongolia: implications for tectonic evolution

Frontiers in Earth Science
IntroductionThe east-west trending Khondalite Belt, located on the northern margin of the North China Craton, is linked to the Paleoproterozoic Columbia supercontinent’s evolution.
Hao Hu, Dongyan Zhong, Zhiguang Zhou, Guosheng Wang, Shen Gao, Jianfeng Chen, Chenfei Feng   +6 more
doaj   +1 more source

Electron Microprobe Reintegration Method for Clinopyroxene Breakdown with Lamellae Exsolution

Yankuang ceshi
Pyroxene is an important rock-forming mineral in magmatic to metamorphic rocks, which often possesses certain breakdown texture with lamellae exsolution under temperature and pressure changes.
Xiaoli LI, Lifei ZHANG
doaj   +1 more source

Prioritization of Metamorphic Relations to reduce the cost of testing [PDF]

arXiv, 2022
An oracle is a mechanism to decide whether the outputs of the program for the executed test cases are correct. For machine learning programs, such oracle is not available or too difficult to apply. Metamorphic testing is a testing approach that uses metamorphic relations, which are necessary properties of the software under test to help verify the ...
arxiv