Results 51 to 60 of about 882,079 (194)

Three Spodumene Reference Materials for Oxygen Isotope Measurement by Ion Microprobe

Geostandards and Geoanalytical Research, EarlyView.
Key Points Three spodumene reference materials were developed for SIMS oxygen isotope measurement. All three materials are homogeneous in oxygen isotopes. Crystal orientation has no effect on instrumental mass fractionation. This study reports on the development of three spodumene reference materials referred to as Curtin University (CU) Tri‐1, Kun‐A‐1
Andreas T. Hertwig, Johannes Chischi, Axel K. Schmitt, Hans C. Oskierski, Kai Rankenburg, Martin Wells, Benita Putlitz, Zakaria Quadir   +7 more
wiley   +1 more source

Remobilisation features and structural control on ore grade distribution at the Konkola stratiform Cu-Co ore deposit, Zambia [PDF]

, 2013
The Konkola deposit is a high grade stratiform Cu–Co ore deposit in the Central African Copperbelt in Zambia. Economic mineralisation is confined to the Ore Shale formation, part of the Neoproterozoic metasedimentary rocks of the Katanga Supergroup ...
Ague, Armstrong, Barber, Batumike, Batumike, Best, Brems, Bull, Cailteux, Cailteux, Cailteux, Chivot, Cosgrove, Cosi, Craig, Craig, Crowe, De Putter, de Roo, De Waele, Dechow, Decrée, Dewaele, El Desouky, Faleiros, Fay, Field, Fitches, Fleischer, Gorjan, Haest, Haest, Hilgers, Hurtgen, Hurtgen, Jackson, Jessell, John, Kampunzu, Kampunzu, Katsikopoulos, Key, Larocque, Lerouge, Lipalile, Machel, Machel, Marshall, Master, Master, McGowan, Meert, Muchez, Muchez, Mulenga, Passchier, Porada, Rainaud, Ramdohr, Raybould, Richards, Ridgway, Schwellnus, Sibson, Sibson, Sillitoe, Stipp, Sutton, Sweeney, Sweeney, Tanner, Tembo, Unrug, Van Noten, Vaughan, Veizer, Wagner, Wendorff, Wendorff   +78 more
core   +1 more source

The Effect of Crystal Orientation on In Situ Rb‐Sr Mica Geochronology

Geostandards and Geoanalytical Research, EarlyView.
Key Points No significant effect of mica grain orientation on Rb‐Sr date. Rb‐Sr laser signal stability is generally better perpendicular to mica c‐axis. No significant matrix effect noted between different mica group members. Mica crystals have a highly asymmetric structure, arranged in sheets of two tetrahedral layers bonded to a single octahedral ...
Kyle P. Larson, Sudip Shrestha, Mark Button, John M. Cottle, Christopher J. Barnes   +4 more
wiley   +1 more source

Shock effects in plagioclase feldspar from the Mistastin Lake impact structure, Canada [PDF]

, 2015
Shock metamorphism, caused by hypervelocity impact, is a poorly understood process in feldspar due to the complexity of the crystal structure, the relative ease of weathering, and chemical variations, making optical studies of shocked feldspars ...
Flemming, Roberta L., Osinski, Gordon R., Pickersgill, Annemarie E.   +2 more
core   +1 more source

Coupling Phase Equilibrium Modelling and Apatite‐in‐Garnet Elastic Barometry to Unravel the P–T Path of the Micaschist Unit From the Zicavo Metamorphic Complex (Corsica, France)

Journal of Metamorphic Geology, EarlyView.
ABSTRACT To gain insights into the pressure–temperature evolution of a scarcely studied portion of the Variscan basement of Corsica in southern Europe, we combined phase equilibrium modelling, Zr‐in‐rutile thermometry and apatite‐in‐garnet elastic barometry. We investigated Grt‐St micaschist rocks containing garnet grains of several millimetres in size
Lorenzo Dulcetta, Xin Zhong, Gabriele Cruciani, Johannes Vrijmoed, Jan Pleuger, Marcello Franceschelli, Timm John   +6 more
wiley   +1 more source

Weathering microenvironments on feldspar surfaces: implications for understanding fluid-mineral reactions in soils [PDF]

, 2008
The mechanisms by which coatings develop on weathered grain surfaces, and their potential impact on rates of fluid-mineral interaction, have been investigated by examining feldspars from a 1.1 ky old soil in the Glen Feshie chronosequence, Scottish ...
Blum, C. L. Smith, D. J. Brown, M. E. Hodson, M. Mackenzie, M. R. Lee, Smith, Velbel, Zhu   +8 more
core   +2 more sources

Geochronology (Re–Os and U–Pb) and fluid inclusion studies of molybdenite mineralisation associated with the Shap, Skiddaw and Weardale granites, UK [PDF]

, 2008
Late Devonian magmatism in Northern England records key events associated with the Acadian phase of the Caledonian-Appalachian Orogen (C-AO). Zircon U-Pb and molybdenite Re-Os geochronology date emplacement and mineralisation in the Shap (405·2±1·8 Ma ...
Conliffe, J., Crowley, Q.G., Feely, M., Selby, D.   +3 more
core   +1 more source

Base metal mineralisation associated with Ordovician shales in south-west Scotland [PDF]

, 1984
Several narrow, lenticular belts of black cherty mudstone and siltstone (the Moffat Shales), alternating with thick greywacke sequences, strike north-east to south-west across Galloway with uniformly steep dip.
Jones, R.C., Leake, R.C., Stone, P.
core  

Application of 3D Raman Mapping on Complex Inclusions: A Case Study of the Styrian Basin Mantle Xenoliths (W‐Carpathian Pannonian Region)

Journal of Raman Spectroscopy, Volume 56, Issue 7, Page 577-589, July 2025.
Recent advancements in spectral and spatial resolutions for Raman spectroscopy allow the analysis of fluid and melt inclusions. To explore the applicability of 3D Raman mapping, we conducted 3D Raman mapping on inclusions hosted by orthopyroxene in modally metasomatized mantle xenoliths from the Styrian Basin (W‐Carpathian Pannonian Region).
Justine L. Myovela, László E. Aradi, Tamás Spránitz, Zoltán Taracsák, Máté Hegedűs, Patrik Konečný, János Kovács, Márta Berkesi   +7 more
wiley   +1 more source

Biomineralisation in the Palaeozoic oceans: evidence for simultaneous crystallisation of high and low magnesium calcite by phacopine trilobites [PDF]

, 2012
The chemical composition and microstructure of the calcite cuticles of eleven species of phacopine trilobites have been investigated by electron beam imaging, diffraction, and microanalysis, and results reveal that the lenses of their schizochroal eyes ...
Alan W. Owen, Blake, Brand, Bruton, Campbell, Carpenter, Clare Torney, Clarkson, Clarkson, Dickson, Dickson, Dickson, Dickson, Goldsmith, Grover, Gunderson, Hardie, James, Klug, Lee, Lee, Lee, Lee, Leutoff, Lohmann, Lowestam, Martin R. Lee, McAllister, McAllister, Miller, Porter, Reeder, Rush, Schoenemann, Taylor, Teigler, Tobin, Torney, Towe, Webb, Wilmot, Wilmot, Zhuravlev   +42 more
core   +1 more source