Results 41 to 50 of about 2,033 (198)

Geophysical update of the diameter of the Zhamanshin impact structure, Kazakhstan

Meteoritics &Planetary Science, EarlyView.
Abstract The rim of the 0.9‐Ma‐old Zhamanshin impact crater in Kazakhstan is considered to be almost completely exposed via a series of hills surrounding a central flat area, indicating an apparent diameter of 14 km. This would make Zhamanshin the second largest impact crater of the Quaternary period. However, the overall geometry of these hills is not
Yoann Quesnel, Dilyara M. Kuzina, Jérôme Gattacceca, Minoru Uehara, Ayrat G. Kharisov, Dmitry D. Badyukov, Pierre Rochette   +6 more
wiley   +1 more source

Plant endemism of the Balkan high‐mountain fens: a community‐level synthesis and their climate change perspective

Plant Biology, EarlyView.
Balkan high‐mountain fens harbour unique endemic plant communities, with a west‐to‐east compositional gradient and local richness primarily shaped by palaeoclimate. As these fens have already experienced drier, warmer summers than at present, they may withstand climate change if actively and effectively protected. Abstract The phenomenon of Balkan high‐
M. Hájek, P. Hájková, M. Chobanova, Z. Plesková, E. Bergmeier, P. Lazarević, D. Szokala, N. Berisha, L. Shuka, D. Dítě, T. Peterka, R. Čusterevska, D. Sopotlieva, J. Divíšek, I. Goia, B. Vrábel, Đ. Milanović, S. Hristovski, D. Stešević, P. Bureš, I. Apostolova   +20 more
wiley   +1 more source

Petrology, u-pb isotope age and metamorphism of nyashevo polygenic mafit-ultramafite massive (the southern urals)

Литосфера, 2017
In the article is presented data of mineralogy, petrography, geochemistry and isotope-geochronology study Nyashevo mafic-ultramafic massif in Ilmeny-Vishnevogorsk polymethamorphic shear zone. The ultramafic rocks consist of serpentine and chlorite (up to
Natal’ya M. Valizer, Artur A. Krasnobaev, Anatolii I. Rusin, Natal’ya M. Murdasova   +3 more
doaj   +2 more sources

Mineralogical and geochemical controls of nickel in the ultramafic rocks of Sul-Riograndense Shield [PDF]

Geologia USP. Série Científica, 2014
This work investigates the processes controlling the mobility and concentration of nickel in serpentinized ultramafic rocks of the Sul-Riograndense Shield (ESrg).
Thamy Lara de Souza, Marcus Vinícius Dorneles Remus, Norberto Dani   +2 more
doaj   +1 more source

Discovery of Blueschists in the Medvednica Mountain (Northern Croatia) and Their Significance for the Interpretation of the Geotectonic Evolution of the Area

Geologia Croatica, 2010
Blueschists were discovered in the metamorphic rocks of the Medvednica mountain. Two varieties of blueschists are recognised, one with garnets and another with omphacite.
Mirko Belak, Darko Tibljaš
doaj   +1 more source

Petrogenesis of ultramafic rocks with abyssal peridotite affinity from the Central Bundelkhand Craton, India

Geosystems and Geoenvironment
The Bundelkhand craton in India preserves important records of archean geological evolution, where several ultramafic rocks belonging to the Babina Greenstone Belt (BGB) occur as isolated and oval shaped bodies.
Abinash Sahu, Neeraj Vishwakarma, M. Santosh, Yamuna Singh, K.R. Hari   +4 more
doaj   +1 more source

Release of potassium from rock powder by the yeast Torulaspora globosa

Brazilian Archives of Biology and Technology, 2012
The alteration of minerals in rocks and the availability of elements for plant nutrition require long periods of time, and microorganisms are thought to induce the release of potassium and phosphate from rocks.
Márcia Maria Rosa-Magri, Simoni Helena Avansini, Maria Leonor Lopes-Assad, Sâmia Maria Tauk-Tornisielo, Sandra Regina Ceccato-Antonini   +4 more
doaj   +1 more source

Mafic and Ultramafic Rock Association in the East Arc of Sulawesi

Journal of Mathematical and Fundamental Sciences, 2019
Busur Timur Sulawesi, yang terdiri dari Sulawesi Timur dan Tenggara, sebagian besar ditempati oleh suatu komplek luas terdiri dari kelompok batuan ultramafic yang diperkirakan berumur Mososoik hingga Tersier Bawah.
R. Soeria Atmadja, J.P. Golightly, B.N. Wahju   +2 more
doaj  

Skeletal, microspinifex and harrisite textures in the Upper Paleozoic komatiitic sills and lavas from the Mashhad-Virani Complex, NE Iran

Journal of Economic Geology, 2019
Introduction The Mashhad- Virani complex has been sandwiched between the collided Lut block and Turan plate. This complex is composed of the following four units: 1) ultramafic-mafic rocks, 2) metamorphosed sedimentary rocks, 3) pyroclastic rocks and 4)
Mohsen Mobasheri, Habibollah Ghasemi, Behnam Rahimi, Mojtaba Rostami Hussory   +3 more
doaj   +1 more source

Plagioclasites from chromite-bearing ultramafic rocks of the Rai-Iz massif

Литосфера, 2016
The corundum-bearing and without-corundum plagioclasites from chromite-bearing ultramafic rocks of Rai-Iz massif were studied. Chemical composition of the rock-forming minerals and rock geochemical characteristics was determined.
N. V. Vakhrusheva, K. S. Ivanov, A. E. Stepanov, S. P. Shokalsky, A. N. Azanov, V. V. Hiller, P. B. Shiryayev   +6 more
doaj   +2 more sources