Results 21 to 30 of about 25,598 (206)
Spherulite formation in obsidian lavas in the Aeolian Islands, Italy [PDF]
, 2017 The authors wish to gratefully acknowledge Andy Tindle (The Open University) for assistance with EMP analyses, and Richard Darton and David Evans (Keele University) for assistance with XRD and Prof Alun Vaughan and Nicola Freebody (University of ...
Bullock, Liam A. +2 more
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Chemical diffusion of fluorine in melts in the system Na2OAl2O3SiO2 [PDF]
, 1985 The volatilization of fluorine from three melts in the system Na2OAl2O3SiO2 has been investigated at 1 atm pressure and 1200–1400°C. The melts chosen have base compositions corresponding to albite, jadeite and a peraluminous melt with 75 mole % SiO2 ...
Al-Dulaimy +34 more
core +1 more source
A New Aceramic Neolithic Site Nearby the Obsidian Sources: Preliminary Insights from Sırçalıtepe
Anadolu Araştırmaları, 2021 This paper is a general assessment of the studies conducted in 2019 and 2020 at the site of Sırçalıtepe. The settlement, which is dated to the 8th mill BCE, is located in the Volcanic Cappadocia region, within the borders of the Kayırlı village in the ...
Semra Balcı +5 more
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Chemical diffusion of fluorine in jadeite melt at high pressure [PDF]
, 1984 The chemical diffusion of fluorine in jadeite melt has been investigated from 10 to 15 kbars and 1200 to 1400°C using diffusion couples of Jadeite melt and fluorine-bearing jadeite melt (6.3 wt.% F). The diffusion profile data indicate that the diffusion
Dingwell, Donald B. +1 more
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Volcanic eruptions from ghost magma chambers [PDF]
, 2008 Recent studies have proposed that magma reservoirs crystallized to a virtually rigid crystal-mush can be partially remelted by diffusion of hot fluids. We show that for a crystal mush with the composition of a K-trachyte from the Campanian Ignimbrite (CI)
BATTAGLIA, MAURIZIO +3 more
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Open Archaeology, 2019 This article presents the first archaeometric research carried out so far on a group of obsidian artifacts collected in the promontory of Pirozza-Spalmatore, the site of a Neolithic settlement on the small island of Ustica (Sicily, Italy).
Franco Foresta Martin, Tykot Robert H.
doaj +1 more source
Frequency Dependent Rheology of Vesicular Rhyolite [PDF]
, 1993 Frequency dependent rheology of magmas may result from the presence of inclusions (bubbles, crystals) in the melt and/or from viscoelastic behavior of the melt itself.
Angell +28 more
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Open Archaeology, 2019 This paper presents the results of the geochemical characterisation of complete obsidian assemblages dating to the Early Aceramic Neolithic (8200–6900 Cal BC) and located in Cyprus, eastern Mediterranean.
Moutsiou Theodora
doaj +1 more source
Analisis Teknologi Artefak Obsidian Danau Bandung Purba
Pubawidya: Jurnal Penelitian dan Pengembangan Arkeologi, 2012 . Stone tool's was one of a kind that prehistory man use and made, where is purpose or un purpose to help their daily life's. There's lot of stone material that man could use to make stone tool and one of them is Obsidian.
Anton Ferdianto
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TECHNOLOGICAL EXPLORATION AND RITUAL USE OF OBSIDIAN IN ANCIENT CULTURES OF THE PACIFIC
Теория и практика археологических исследований, 2022 The article examines a range of directions and current stage of obsidian studies within the Pacifi c basin such as (1) geochemistry, identifi cation of volcanic glass sources used in ancient cultures; (2) technology, obsidian exploration methods, their ...
А.В. Табарев +2 more
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