Results 1 to 10 of about 614,432 (300)
Influence of reservoir geology on seismic response during decameter-scale hydraulic stimulations in crystalline rock [PDF]
Solid Earth, 2020 We performed a series of 12 hydraulic stimulation experiments in a 20m×20m×20m foliated, crystalline rock volume intersected by two distinct fault sets at the Grimsel Test Site, Switzerland.
L. Villiger +13 more
doaj +2 more sources
PETROGRAPHY AND GEOCHEMISTRY OF METASEDIMENTS FROM BUGAJI, PART OF MALUMFASHI SHEET 79 NE, KANO STATE, NORTHWESTERN NIGERIA [PDF]
Geological Behavior, 2023 This research is aimed at determining the protolith of metasediments that underpin the geology of Bugaji region of Kano State. The study area was mapped systematically and the lithologies encountered include phyllite, undifferentiated schist, quartzo ...
Abdullah Musa Ali +1 more
doaj +1 more source
Geochemical and reflectance spectroscopy data integration to characterize emerald deposits: the case of the Paraná deposit, Brazil [PDF]
Anais da Academia Brasileira de Ciências, 2021 The Paraná emerald deposit is one of the few occurrences of emerald, a rare beryl variety, in Borborema Province, northeastern Brazil. We characterized the Paraná deposit by combining field geology, petrography, whole-rock geochemistry, mineral chemistry,
JOSÉ F. ARAÚJO NETO +4 more
doaj +1 more source
Structural framework and timing of the Pahtohavare Cu ± Au deposits, Kiruna mining district, Sweden [PDF]
Solid Earth, 2023 As part of the larger mineral systems approach to Cu-bearing mineralization in northern Norrbotten, this study utilizes structural geology to set the classic Pahtohavare Cu ± Au deposits into an up-to-date tectonic framework.
L. Logan +4 more
doaj +1 more source
Journal of the Geological Survey of Brazil, 2021 The Querari Complex corresponds to the basement rocks from Uaupés Domain and represents one of the least studied units in the northwest of the Rio Negro Province, Amazonian Craton.
Paulo Jerry Bentes Gomes +4 more
doaj +1 more source
Geology of the Mutis Complex, Miomaffo, West Timor
Australian Journal of Earth Sciences, 2023 Mesozoic forearc assemblages are widespread across Indonesia, and these are also exposed in the overthrust terranes on Timor. The oldest rocks in the allochthonous Mutis Complex, West Timor are Mesozoic basaltic volcaniclastic rocks and melange ...
R. Berry +4 more
semanticscholar +1 more source
Geologia USP Série Científica, 2023 Amethyst quartz deposits occur in some regions of Minas Gerais state, Brazil, related to different geological environments. The most important are associated with hydrothermal veins crossing the Espinhaço mountain range, mainly in small and eroded ...
M. Chaves +3 more
semanticscholar +1 more source
Basin Research, 2021 The rift phase of the Campos Basin developed during the Early Cretaceous on a heterogeneous crust comprising structures inherited from the Brasiliano‐Pan African tectonic events, mostly generated during the Neoproterozoic‐Cambrian amalgamation of western
M. Strugale, R. Schmitt, J. Cartwright
semanticscholar +1 more source
Evolution of structures and hydrothermal alteration in a Palaeoproterozoic supracrustal belt: Constraining paired deformation–fluid flow events in an Fe and Cu–Au prospective terrain in northern Sweden [PDF]
Solid Earth, 2020 An approximately 90 km long Palaeoproterozoic supracrustal belt in the northwestern Norrbotten ore province (northernmost Sweden) was investigated to characterize its structural components, assess hydrothermal alteration–structural geology ...
J. B. H. Andersson +2 more
doaj +1 more source
Journal of maps, 2021 This work presents the structural evolution of a poorly studied key-area in the middle Ala Valley, Western Alps, where two tectono-metamorphic units are exposed.
F. Caso +3 more
semanticscholar +1 more source