Results 51 to 60 of about 136,558 (327)

Zircon ages in granulite facies rocks: decoupling from geochemistry above 850 °C? [PDF]

, 2018
Granulite facies rocks frequently show a large spread in their zircon ages, the interpretation of which raises questions: Has the isotopic system been disturbed? By what process(es) and conditions did the alteration occur?
A Boriani, A Boriani, A Henk, A Langone, A Mulch, A Mulch, A Möller, A Zanetti, A Zingg, A Zingg, A-M Seydoux-Guillaume, AE Hofmann, B Bingen, B Schnetger, Barbara E. Kunz, BE Kunz, BE Kunz, C Annen, C Paton, C Paton, C Redler, C Redler, C Yakymchuk, CR McFarlane, CR McFarlane, D Regis, D Rubatto, D Rubatto, D Rubatto, D Rubatto, D Rubatto, Daniele Regis, DE Kelsey, DE Kelsey, DJ Cherniak, DJ Cherniak, DM Fountain, DM Fountain, E Rutter, EB Watson, EB Watson, EM Peterman, F Corfu, F Tomaschek, FJ Korhonen, G Bigi, G Fraser, G Peressini, G Rivalenti, G Rivalenti, G Vavra, G Vavra, GL Luvizotto, H Berckhemer, H Degeling, H Voshage, IS Williams, IS Williams, J Hermann, J Pape, J Sláma, JA Baldwin, JA Petrus, JE Quick, JE Quick, JF Diener, JW Valley, K Mezger, KR Mehnert, L Nasdala, L Nasdala, L Schiøtte, M Bertolani, M Bertolani, M Guillong, M Kohn, M Tichomirowa, MA Kusiak, MA Kusiak, Martin Engi, MJ Whitehouse, MP Roberts, MR Handy, MR Handy, NE Timms, NE Timms, NJ Pearce, NM Kelly, P Monjoie, P Vonlanthen, PW Hoskin, PW Hoskin, PW Hoskin, R Schuster, RC Ewing, RJ Taylor, RM Flowers, RT Pidgeon, S Barboza, S Barboza, S Bodorkos, S Capedri, S Piazolo, S Sinigoi, S Sinigoi, S Sinigoi, SE Jackson, SH Vorhies, SL Harley, SM Reddy, SM Schmid, SM Schmid, T Geisler, T Geisler, TA Ewing, U Schaltegger, U Schaltegger, U Schaltegger, U Schaltegger, US Klötzli, WF McDonough   +120 more
core   +1 more source

Early evolutionary history of the seed

Biological Reviews, EarlyView.
ABSTRACT The seed is an essential stage in the life history of gymnospermous and angiospermous plants, facilitating both their survival and dispersal. We reappraise knowledge of the evolutionary history of the gymnospermous seed, from its origin in the late Devonian through to the well‐known end‐Permian extinctions – an interval encompassing the ...
Richard M. Bateman, Alan R. T. Spencer, Jason Hilton   +2 more
wiley   +1 more source

Geological structure and petrology of the Nizhne-Sinyachikhinsky granitoid massif (Alapayevsk-Sukhoi Log porphyry copper zone, the Middle Urals)

Литосфера, 2020
Research subject. The geological structure and rock composition of the Nizhne-Sinyachikhinsky plagiogranite massif, which is part of the Alapaevsk-Sukholozhsky zone, is promising for the Cu(Au,Mo)-porphyric mineralization type, were studied.
S. V. Pribavkin, A. V. Коrovko, I. A. Gottman   +2 more
doaj   +1 more source

A perspective review of applications of the computed tomography (CT) scan imaging technique for microscopic reservoir rock characterization

Deep Underground Science and Engineering, EarlyView.
In this review, the application of micro‐CT and medical‐CT scanning in the oil and gas industry has been thoroughly discussed. Recent improvements in DRP and modern imaging techniques in the oil and gas industry have been modeled using both experimental and simulation work.
Achinta Bera, Bharadwaj Shukla, Dhruvikkumar Jogani   +2 more
wiley   +1 more source

Characterization of the permeability evolution of hard and soft rocks under hydro‐mechanical coupling conditions

Deep Underground Science and Engineering, EarlyView.
The permeability variation of rocks during complete stress–strain processes was investigated. A mathematical model describing the influence of rock damage on permeability was constructed. The permeability–stress relationship between soft rock and hard rock was proposed.
Zhen Huang, Jian Yu, Yun Wu, Cong Gong, Xiaozhao Li, Kui Zhao, Dickson Moyo   +6 more
wiley   +1 more source

Expanding the application of the Eu-oxybarometer to the lherzolitic shergottites and nakhlites: Implications for the oxidation state heterogeneity of the Martian interior [PDF]

, 2009
Experimentally rehomogenized melt inclusions from the nakhlite Miller Range 03346 (MIL 03346) and the lherzolitic shergottite Allan Hills 77005 (ALH 77005) have been analyzed for their rare earth element (REE) concentrations in order to characterize the ...
Elkins-Tanton, Linda, McCanta, Molly C., Rutherford, Malcolm J.   +2 more
core   +1 more source

Geological and geotechnical challenges on the Great Dyke of Zimbabwe and their impact on hardrock pillar design

Deep Underground Science and Engineering, EarlyView.
The Great Dyke of Zimbabwe is notable for its rich platinum group metal deposits but poses significant geological and geotechnical challenges due to its complex rock types and structural features. Traditional pillar design methods are insufficient for addressing these complexities; the study suggests incorporating advanced techniques such as machine ...
Tawanda Zvarivadza, Hendrik Grobler, Moshood Onifade, Manoj Khandelwal   +3 more
wiley   +1 more source

Geologic structure and composition of Munilkan massif Verkhoyansk-Kolyma orogenic area

Литосфера, 2015
This article presents the results of detailed study of geologic structure and composition of Munilkan massif of the Main batholith belt of Verkhoyansk-Kolyma mesozoides (Tas-Khayakhtakh Ridge).
V. A. Trunilina, S. P. Roev, A. I. Zaitsev   +2 more
doaj   +2 more sources

Petrogenetic of Igneous Complex of Ilota Nanasi Gold Deposit, Gunung Pani, Gorontalo, Indonesia

JGEET: Journal of Geoscience, Engineering, Environment and Technology, 2023
Ilota Nanasi Au-Ag deposit located in the western flank of the Gn. Baganite, a part rhyodacite dome in Gn. Pani district, Gorontalo Province, where the extensive exploration programs were carried out by PT Gorontalo Sejahtera Mining (a subsidiary of PT J
Iryanto Rompo, Fajar Ismail, STJ Budi Santoso, Mega Fatimah Rosana, Euis Tintin Yuningsih   +4 more
doaj   +1 more source

Mineral chemistry of late Variscan gabbros from central Spain: constraints on crystallisation processes and nature of the parental magmas [PDF]

, 2015
© 2016. Universidad Complutense de Madrid. The commercial rights of the printed and online versions of Journal of Iberian Geology are property of the Universidad Complutense de Madrid (UCM) and the Consejo Superior de Investigaciones CientÍficas (CSIC),
Jeffries, T, Losantos, E, Orejana, D, Villaseca, C   +3 more
core   +3 more sources