Results 91 to 100 of about 11,333 (211)
Geochronology of the felsic rocks in Orijärvi, southern Finland – implications for stratigraphy [PDF]
Estonian Journal of Earth SciencesThe Orijärvi area within the Paleoproterozoic Uusimaa belt contains volcanic and minor sedimentary formations, providing valuable insights into the oldest Svecofennian crust in southern Finland.
Elisa Toivanen +4 more
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NW UK continental margin : chronology and isotope geochemistry [PDF]
, 2005 Until recently, a significant proportion of the crystalline basement from the NW UK continental shelf was virtually terra incognita in comparison with similar rocks on the mainland.
Chambers, Lynne +3 more
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Frontiers in Earth ScienceThe Xiaoqinling gold province, located in the southern margin of the North China Craton (NCC), is the second largest gold-enriched region in China. In this region, the Mesozoic Huashan (HS) and Wenyu (WY) plutons are the major magmatic intrusions coeval ...
Quan Wei +17 more
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Metallogenic features of Miocene porphyry Cu and porphyry-related mineral deposits in Ecuador revealed by Re-Os, 40Ar/39Ar, and U-Pb geochronology [PDF]
, 2018 Mineralization and alteration events at ten Miocene porphyry Cu and porphyry-related epithermal mineral deposits in southern, central, and northern Ecuador were dated by means of molybdenite Re-Os, biotite and alunite 40Ar/39Ar, and titanite U-Pb ...
Barra, Fernando +4 more
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Continuous Cauchy wavelet transform of XAFS spectra. [PDF]
, 2005 The continuous Cauchy wavelet transform (CCWT) is applied to the analysis of XAFS spectra. Thanks to that method, XANES and EXAFS signals can be visualized in threedimension: the wavevector (k), the interatomic distance uncorrected for phase-shifts (R ...
Argoul, Pierre +2 more
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Gemological and Chemical Characterization of Gem-Quality Titanite from Morocco
CrystalsTitanite is a widespread accessory mineral in igneous, metamorphic, and hydrothermal rocks, but few comply with gem-grade requirements. Previous studies on Moroccan titanite focused on elementary composition and U-Pb dating.
Yu Yuan +5 more
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U-Pb isotopic results for single shocked and polycrystalline zircons record 550-65.5-Ma ages for a K-T target site and 2700-1850-Ma ages for the Sudbury impact event [PDF]
The refractory mineral zircon develops distinct morphological features during shock metamorphism and retains these features under conditions that would anneal them in other minerals.
Bohor, B. F., Kamo, S. L., Krogh, T. E.
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Записки Горного институтаMineralogical-geochemical (SIMS method) study of titanite and geochronological (ID-TIMS method) study of garnets from mineral mines of the Southern Urals has been carried out. The mineral associations containing titanite belong to four contrasting types:
Vladislav S. Stativko +4 more
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Geochemistry of the Rio Espinharas hybrid complex, northeastern Brazil [PDF]
, 1962 The Rio Espinharas pluton, northeastern Brazil, belongs to the shoshonitic series and consists mainly of syenogranite, quartz-monzonite and porphyritic quartz-monzonite, but diorite, quartz-monzodiorite, quartz-syenite and microsyenogranite also occur ...
Campos, T. F. C. +2 more
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CrystalsTitanites can be excellent markers of element transfer in medium-temperature retrograde metamorphism. Euhedral titanites from several alpine fissures from Mont Blanc, particularly those of Périades and Courtes, crystallised at the end of the main quartz ...
Michel Cathelineau, Chantal Peiffert
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