Results 61 to 70 of about 47,841 (257)

Chemical Discrimination of Rutile From Different Metamorphic Source Rocks: Dealing With Hierarchical Data Structures in Random Forest Classification

open access: yesJournal of Metamorphic Geology, EarlyView.
ABSTRACT Rutile provides a wealth of petrochronological information in metamorphic geology and due to its high stability during processes of the sedimentary cycle, rutile takes a special position in sedimentary provenance analysis. Besides being one of the classical minerals datable using the U–Pb system, rutile incorporates a broad range of trace ...
Jan Schönig   +9 more
wiley   +1 more source

Late Cenozoic metamorphic evolution and exhumation of Taiwan [PDF]

open access: yes, 2007
The Taiwan mountain belt is composed of a Cenozoic slate belt (Hsuehshan Range units, HR, and Backbone Slates, BS) and of accreted polymetamorphic basement rocks (Tananao Complex, TC).
Avouac, Jean-Philippe   +6 more
core   +4 more sources

Gneiss and steatite vermicomposted with organic residues: release of nutrients and heavy metals

open access: yesInternational Journal of Recycling of Organic Waste in Agriculture, 2019
Purpose Use of silicate rock powders as fertilizer improves nutrient cycling, thus benefitting agriculture. The availability of nutrients to plants is often low, but can be increased when rock powder is vermicomposted and added.
Maria Eunice Paula de Souza   +4 more
doaj   +1 more source

An occurrence of monazite in Puumala, eastern Finland [PDF]

open access: yesBulletin of the Geological Society of Finland, 1969
A monazite occurrence consisting of three monazite-bearing biotite-rich veins is described. The veins have pegmatitic affinities but are very inhomogeneous.
I. Haapala   +3 more
doaj   +1 more source

Coesite Discovery in Eclogites Confirms UHP Metamorphism in the Orlica‐Śnieżnik Dome (SW Poland)

open access: yesJournal of Metamorphic Geology, EarlyView.
ABSTRACT Eclogite lenses are exposed within the orthogneiss‐dominated core of the Orlica‐Śnieżnik Dome in the Sudetes, which forms the northeastern margin of the Bohemian Massif (Variscan Belt of Central Europe). The presence of coesite inclusions in garnet and omphacite confirms that these eclogites underwent ultrahigh‐pressure metamorphism.
Małgorzata Nowak   +4 more
wiley   +1 more source

Geology of the Sandercock Nunataks in Enderby Land, East Antarctica (Reports of the Japanese Antarctic Research Expedition)

open access: yesAntarctic Record, 1972
The Sandercock. Nunataks (68°33'S, 52°07'E) are composed of several small nunataks which are tentatively named A, B, C and D. Nunatak "A" consists mainly of hornblende-biotite gneiss and Nunatak "B" of hypersthene-garnet gneiss and garnet gneiss. Nunatak
Kazuyuki SHIRAISHI   +2 more
doaj   +1 more source

Location, Location, Location: Monazite Behaviour During UHT Metamorphism and Melt Crystallization

open access: yesJournal of Metamorphic Geology, EarlyView.
ABSTRACT Monazite is a robust mineral for recording the suprasolidus evolution of migmatites and granulites. However, monazite commonly has diverse compositions and yields variable dates in a single sample; understanding the controls on monazite behaviour and composition during partial melting and melt crystallization are not always straightforward ...
Chris Yakymchuk   +2 more
wiley   +1 more source

Tectonic evolution of greenstone-Gneiss association in Dharwar Craton, South India: Problems and perspectives for future research [PDF]

open access: yes
The two fold stratigraphic subdivision of the Archean-Proterozoic greenstone-gneiss association of Dharwar craton into an older Sargur group (older than 2.9 Ga.) and a younger Dharwar Supergroup serves as an a priori stratigraphic model.
Rao, Y. J. B.
core   +1 more source

Decoding Metamorphic Nanodiamonds Formation Through Their Internal Structures

open access: yesJournal of Metamorphic Geology, EarlyView.
ABSTRACT Metamorphic diamonds offer insights into Earth's evolution, modulating the global carbon cycle through subduction into the mantle and exhumation. However, the formation and internal structure of minute diamonds remain poorly understood. Here, we study the internal structures of diamond‐bearing inclusions from the Eastern Alps using state‐of ...
Tim Sotelšek   +8 more
wiley   +1 more source

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