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all geography including DSDP/ODP Sites and Legs
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Reptilia
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Insecta
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Chattanooga Shale (1)
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Permian
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Silurian
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Tonoloway Limestone (1)
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Woodford Shale (1)
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Allan Hills Meteorites
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Indarch Meteorite (1)
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minerals
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antimonates (1)
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orthosilicates
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epidote group
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ring silicates
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orpiment (1)
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Primary terms
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Journal Article
Hanswilkeite, KFeS 2 , a new peralkaline sulfide mineral Available to Purchase
Sergey N. Britvin, Mikhail N. Murashko, Maria G. Krzhizhanovskaya, Oleg S. Vereshchagin, Yevgeny Vapnik, Natalia S. Vlasenko, Yulia S. Shelukhina, Vladimir N. Bocharov
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 June 2025
American Mineralogist (2025) 110 (6): 956–965.
... Formation, southern Negev Desert, Dead Sea basin, Israel. The mineral occurs in sulfide-calcite assemblages confined to black-colored calcite-spurrite marbles. It forms single-crystal grains up to 1 mm in size, isometric to lath-like, and often intergrown with a less-common rasvumite, KFe 2 S 3 . Associated...
Includes: Supplemental Content
Journal Article
Cabrerite, NiMg 2 (AsO 4 ) 2 ·8H 2 O, a new old mineral: The ordered intermediate between annabergite and hörnesite Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 April 2025
American Mineralogist (2025) 110 (4): 643–649.
... across. (Color online.) Figure 2. Crystal drawing of cabrerite, clinographic projection. Cabrerite is optically biaxial (+) with α = 1.609(2), β = 1.633(2), γ = 1.667(2) measured in white light. The 2 V measured directly on a spindle stage is 82(2)°; the calculated 2 V is 81.6°. Slight...
Includes: Supplemental Content
Journal Article
Cu nanoparticle geometry as the key to bicolor behavior in Oregon sunstones: An application of LSPR theory in nanomineralogy Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 February 2025
American Mineralogist (2025) 110 (2): 293–305.
...Chengsi Wang; Andy H. Shen; Peter J. Heaney; Aaron Palke; Ke Wang; Haiying Wang; Lore Kiefert Abstract The coloration mechanism of Oregon sunstone is a classic and controversial topic in mineralogy because of the unique coexistence of anisotropic (green-red) and isotropic (red) color zones within...
Journal Article
A simple method to create mineral mounts in thin section for teaching optical mineralogy Open Access
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 February 2025
American Mineralogist (2025) 110 (2): 328–335.
...Matthew J. Kohn Abstract Mineral separates mounted in thin section help introduce mineralogy students to concepts of relief, color, pleochroism, and birefringence and serve as reference materials both for research and teaching. Here, a simple method is described to produce materials that can...
Includes: Supplemental Content
Journal Article
THE NATURE OF DARK COLORATION OF DEVONIAN CARBONATE ROCKS ( potentially petroleum-bearing within the Yenisei-Khatanga regional trough ) IN THE AMBARDAKH AREA ( Eastern Siberia ) Available to Purchase
Journal: Russian Geology and Geophysics
Publisher: Novosibirsk State University
Published: 01 January 2025
Russ. Geol. Geophys. (2025) 66 (1): 69–81.
... regional trough, special attention was paid to the dark-colored lithotypes during the research. It was revealed that among the studied samples, the dark color of some of them was of mineral nature, rather than due to the presence of OM. In these samples, the mineral composition was studied in detail...
Journal Article
Petroleum-charge history of Paleozoic carbonates in the Tahe oil field, Tarim Basin, northwestern China: Insights from oil geochemistry, fluid inclusion, and U-Pb dating Available to Purchase
Hao Xu, Xiaowen Guo, Zicheng Cao, Tiago M. Alves, Ze Tao, Bing Wang, Jiaxu Chen, Gaokun Zuo, Xuyou Zhang, Tao Luo
Journal: AAPG Bulletin
Publisher: American Association of Petroleum Geologists
Published: 01 January 2025
AAPG Bulletin (2025) 109 (1): 57–84.
... are investigated in this work based on oil geochemistry, fluid inclusion analyses, and in situ U-Pb dating of calcite cements. Four charge episodes are identified based on the following: (1) the similar origin but different maturation histories of sampled crude oils; (2) the four distinct fluorescence-color...
Journal Article
Gysinite-(Ce), PbCe(CO 3 ) 2 (OH)(H 2 O), a New Member of the Ancylite Group Available to Purchase
Publisher: Mineralogical Association of Canada
Published: 18 December 2024
The Canadian Journal of Mineralogy and Petrology (2024) 62 (6): 863–870.
... with albite, calcite, and mimetite. It is a secondary oxidation-zone mineral presumably crystallized from hydrothermal solutions. Gysinite-(Ce) occurs in intergrowths of equant pseudo-octahedral crystals, up to about 0.7 mm in maximum dimension. The color is brownish yellow, the streak is pale yellow...
Journal Article
Effects of electrokinetic stabilization combined with addition of calcium ions on soil shear strength characteristics in the hilly granitic region of southern China Available to Purchase
Publisher: Geological Society of London
Published: 27 September 2024
Quarterly Journal of Engineering Geology and Hydrogeology (2024) 57 (4): qjegh2023-090.
... collapsing gully. By comparing the soil weathering degree (in terms of the colour, soil texture and soil structural characteristics), the granite soil layer of the study area can be subdivided into three parts: red soil layer, sandy soil layer and detritus layer at the bottom ( Luk et al. 1997 ). Therefore...
Journal Article
Changing your perspective: the impact of different visualisation methods on seismic hazard maps Open Access
Journal: Canadian Journal of Earth Sciences
Publisher: Canadian Science Publishing
Published: 27 September 2024
Canadian Journal of Earth Sciences (2024) 61 (12): 1264–1282.
...Yue Yin; Fabio Crameri; Grace E. Shephard; Philip J. Heron A number of widely used colour palettes applied to display critical scientific results not only distort data but are also inaccessible to a proportion of the population. An issue with the rainbow palette (and variants such as “jet...
Journal Article
Apatite as an archive of pegmatite-forming processes: An example from the Berry-Havey pegmatite (Maine, U.S.A.) Available to Purchase
Encarnación Roda-Robles, Alfonso Pesquera, Pedro Pablo Gil-Crespo, William Simmons, Karen Webber, Alexander Falster, Jon Errandonea-Martin, Idoia Garate-Olave
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 September 2024
American Mineralogist (2024) 109 (9): 1608–1625.
... from a Li-rich pocket. (Color online.) Apatite samples were taken from all the zones of the pegmatite. Those from the core zone, where apatite is especially abundant in some of the pockets and in some elongated “seams,” are the best-represented samples. Characterization of apatite was carried...
Journal Article
The palynology of purple honey: kudzu dismissed, aluminum-sourwood reaction and other sources behind color plausible Available to Purchase
Journal: Palynology
Publisher: AASP -The Palynological Society
Published: 18 July 2024
Palynology (2024) 48 (3): 2317224.
.... However, no one has confirmed the color of the nectar and prior to our study, no one had conducted a palynological analysis of the purple honey to test this hypothesis. A second hypothesis is that the unusual color comes from bees rasping or scavenging sweet juices from ripening berries. Berries injured...
Journal Article
Corundum in Sulfide Ore at the Thompson Mine, Manitoba, Canada: An Unusual Occurrence of Cr- and Ni-Bearing Corundum Available to Purchase
Publisher: Mineralogical Association of Canada
Published: 18 June 2024
The Canadian Journal of Mineralogy and Petrology (2024) 62 (3): 479–488.
... of formation in an exceptionally Ni-rich environment. The high abundance of exsolved rutile inclusions imparts a dominantly brownish-gray color to the corundum, which precludes it from being of gem quality. Chromium-bearing corundum has been suggested as a possible indicator mineral for metamorphosed massive...
Journal Article
The First (and Second) Known Occurrences of Bazzite in Canada – The Quadeville Rose Quartz Quarry, Ontario, and the Bugaboo Castles Aquamarine Deposit, British Columbia – Description and Crystal Structure Open Access
Publisher: Mineralogical Association of Canada
Published: 18 June 2024
The Canadian Journal of Mineralogy and Petrology (2024) 62 (3): 457–478.
..., but it is estimated to be 200 m long and 45 m wide ( Gordon & Masson 1980 , Ercit 1994 ). It is well-zoned, with three recognizable units: (1) a wall zone containing microcline, albite, and quartz, (2) an intermediate zone of microcline and quartz, and (3) a quartz core, which ranges in color from colorless...
Journal Article
A multivariate statistical approach for mineral geographic provenance determination using laser-induced breakdown spectroscopy and electron microprobe chemical data: A case study of copper-bearing tourmalines Open Access
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 June 2024
American Mineralogist (2024) 109 (6): 1085–1095.
... and facetted Paraíba tourmaline displaying the desired brilliant neon blue color. Crystal weighs 8.80 ct, from Brazil. The facetted stone is a 10.91 ct neon blue Paraíba tourmaline (no heat) from the Batalha mine, Brazil. Cut gem courtesy of a Private Collector and Mona Lee Nesseth, Custom Estate Jewels. Photo...
Includes: Supplemental Content
Journal Article
Similarities and differences among selected gemmological varieties of chalcedony: chemistry, mineralogy and microstructure Open Access
Sara Monico, Marco Cantaluppi, Valeria Diella, G. Diego Gatta, Ilaria Adamo, Patrizia Fumagalli, Nicoletta Marinoni
Journal: Mineralogical Magazine
Published: 01 April 2024
Mineralogical Magazine (2024) 88 (2): 136–146.
... in the different colour intensity areas/bands of aquaprase and agate, whereas chrysoprase exhibited a more homogeneous coexistence of micro- and cryptocrystalline quartz. High-resolution synchrotron XRD was essential for highlighting the complex assemblage of various types of α-quartz in aquaprase and agate (which...
Journal Article
Geological maps: evolution and use of the precious knowledge hidden in a coloured landscape Open Access
Journal: Italian Journal of Geosciences
Publisher: Societa Geologica Italiana
Published: 01 February 2024
Italian Journal of Geosciences (2024) 143 (1): 5–24.
... report the geological data with colour and the description of the units, organised according to their age, is provided by a coloured legend. Since geological maps are a mixing between observable and interpreted data of a science, geology, that is still evolving, they should be subjected...
Journal Article
The 450 nm (2.8 eV) cathodoluminescence emission in quartz and its relation to structural defects and Ti contents Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 02 January 2024
American Mineralogist (2024) 109 (1): 122–134.
... of specific luminescence emission bands to different defect centers causes a diversity of CL characteristics and visible CL colors in dependence on the processes of mineral formation or alteration ( Ramseyer et al. 1988 ; Götze et al. 2001 , 2021 ). Therefore, the knowledge about the origin of different...
Journal Article
An UV/Vis/NIR optical absorption spectroscopic and color investigation of transition-metal-doped gahnite (ZnAl 2 O 4 spinel) crystals grown by the flux method Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 02 January 2024
American Mineralogist (2024) 109 (1): 157–166.
...Michail N. Taran; Oleksii A. Vyshnevskyi; Charles A. Geiger Abstract Synthetic flux-grown end-member gahnite, ZnAl 2 O 4 , and several different colored crystals doped with one or more transition metals including Mn, Ni, Cr, Co, and Fe were studied by electron microprobe methods and UV/Vis/NIR...
Includes: Supplemental Content
Journal Article
Color origin and its sedimentary and paleoenvironmental significance of the Permian-Triassic strata in the Ordos Basin, China Available to Purchase
Journal: Interpretation
Publisher: Society of Exploration Geophysicists
Published: 08 December 2023
Interpretation (2024) 12 (1): T29–T46.
...Cong Tan; Bingsong Yu; Ce Liu; Zhenglin Cao; He Bi; Hui Jin; Rongjun Yang Abstract The Permian-Triassic strata in the Ordos Basin deposit a colorful set of strata. Although there have been many studies on oil and gas resources here, little attention has been paid to the genesis mechanism of its...
Journal Article
Characterisation, axial anisotropy, and formation conditions of celestine minerals from the Jabal Eghei (Nuqay) late Neogene – Pleistocene volcanic province, southeastern edge of the Sirt Basin, southern Libya: Constraints on the mineralogical geothermometer Available to Purchase
Pavle Tančić, Maja Milošević, Darko Spahić, Bojan Kostić, Aleksandar Kremenović, Maja Poznanović-Spahić, Jovan Kovačević
Journal: Mineralogical Magazine
Published: 28 November 2023
Mineralogical Magazine (2024) 88 (1): 1–18.
... province in southern Libya and then characterised by applying a combination of the SEM–WDS, ICP/OES, PXRD and IR methods. Colour variations and related minerogenetic frameworks were also investigated. Three samples have greenish-blue-to-blue colour (480.4–482.5 nm), whereas the other two samples have blue...
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