Petrogenesis and geodynamic settings of the Devonian …
Similar findings were found in the Achala and Epo A-type granites in Argentina and South China, respectively (Cámera et al., 2020; Song et al., 2024). The Sikeshu two-mica granites exhibited low 10,000 × Ga/Al ratios, Zr + Nb + Ce + Y contents, and REE contents, with reduced zircon saturation temperatures similar to I-type granites, ranging ...
Granite | Properties, Formation, Composition, Uses » …
In the upper part of QAPF classification of plutonic rocks (Streckeisen, 1976), the granite field is defined by the modal composition of quartz (Q 20 – 60 %) and the P/(P + A) ratio between 10 and 65. The granite field comprises two sub-fields: syenogranite and monzogranite. Only rocks projecting within the syenogranite are considered …
Monazite trumps zircon: applying SHRIMP U–Pb …
Although zircon is the most widely used geochronometer to determine the crystallisation ages of granites, it can be unreliable for low-temperature melts because they may not crystallise new zircon. For leucocratic granites U–Pb zircon dates, therefore, may reflect the ages of the source rocks rather than the igneous crystallisation age. In the …
Weathering profiles in granites, Sierra Norte (Córdoba, Argentina)
Two weathering profiles evolved on peneplain-related granites in Sierra Norte, Córdoba province, were examined. Several weathering levels, of no more than 2 m thickness, were studied in these profiles. They had developed from similar parent rock, which had been exposed to hydrothermal processes of varying intensity. Fracturing is the most notable …
Weathering profiles in granites, Sierra Norte (Córdoba, Argentina)
Request PDF | Weathering profiles in granites, Sierra Norte (Córdoba, Argentina) | Two weathering profiles evolved on peneplain-related granites in Sierra Norte, Córdoba province, were examined.
(PDF) Lower Carboniferous post-orogenic granites in central …
The central-eastern part of the Sierra de Velasco (Sierras Pampeanas, NW Argentina) is formed by the large Huaco (40×30km) and Sanagasta (25×15km) granite massifs and the small La Chinchilla ...
(PDF) Tourmaline-quartz development across the magmatic …
PDF | On Nov 3, 2021, Darrell James Henry and others published Tourmaline-quartz development across the magmatic-to-hydrothermal transition in peraluminous granites from NW Argentina | Find, read ...
A Geologist's Definitive Guide to Granite Rock | Geology Base
The Magma origin for peralkaline granites is fractional crystallization. These rocks occur in intraplate hotspots and intracontinental rifts, with a few in subduction zones. ii. Metaluminous granite. Metaluminous granites are alumina undersaturated with A/CNK<1 but Al 2 O 3 > alkalis (Na 2 O + K 2 O) and Al 2 O 3 < Na 2 O + K 2 O + CaO). Thus ...
Low-temperature crystallization of granites and the …
The structure and composition of granites provide clues to the nature of silicic volcanism, the formation of continents, and the rheological and thermal properties of the Earth's upper crust as ...
(PDF) Age and origin of coeval TTG, I- and S-type granites in …
Three granitoid types are recognised in the Famatinian magmatic belt of NW Argentina, based on lithology and new geochemical data: (a) a minor …
Hybridization between I-type and S-type granites in the …
J. López et al. Hybridized S- and I-type granites in Tafí del Valle (Argentina) 27 al., 1998, 2001, 2007; Omarini et al., 1999). Especially for NW Argentina, these orogens could have resulted from the continuous evolution of an intracratonic mobile belt along the continental margin of Gondwana with the
Fission-track and 40Ar39Ar evidence for episodic
In order to document quantitatively the cooling and denudation history of the Higher Himalayan granites bordering the Tethyan sedimentary zone, fission-track (FT) apatite and 40 Ar 39 Ar mica ages have been determined on the Gangotri leucogranites and biotite granites in the Garhwal region of India. Gangotri is the source area of the …
Post-orogenic, Carboniferous granite-hosted Sn–W
The granites with lower REE contents are highly evolved granites and are related to Sn–W mineralization. The mineralized granites display higher values of Sn, W and Rb, and lower values of Sr and Ba compared to barren granites. ... In Argentina, Sn–W mineralization has been described from various Carboniferous granites in the …
Petrogenesis of early Cretaceous granites in Mufushan …
We present new field observations, whole-rock major and trace elements, Sr-Nd-Pb-Hf isotopes and zircon U Pb ages for the Mesozoic granites in the Mufushan complex, eastern South China. The age determinations by LA-ICP-MS U Pb dating of zircons indicate that the porphyritic biotite granites and two-mica monzogranites have …
[PDF] Lower Carboniferous post-orogenic granites in central …
The central-eastern part of the Sierra de Velasco (Sierras Pampeanas, NW Argentina) is formed by the large Huaco (40 × 30 km) and Sanagasta (25 × 15 km) granite massifs and the small La Chinchilla stock (2 × 2 km). The larger granites intrude into Ordovician metagranitoids and crosscut Devonian (?) mylonitic shear zones, whereas the small …
Age and origin of coeval TTG, I- and S-type granites in the …
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Late Jurassic, high Ba–Sr Linglong granites in the Jiaodong …
These granites have high alkali contents (K 2 O + Na 2 O = 8–9 wt%), low MgO and Mg no. values and variable Cr–Ni abundances. Their relatively high Ba and Sr concentrations, relatively low heavy rare Earth element (HREE) and strongly fractionated REE patterns characterize them as high Ba–Sr granites. ... 40 Ar/ 39 Ar …
Age and origin of coeval TTG, I- and S-type granites in the …
Three granitoid types are recognised in the Famatinian magmatic belt of NW Argentina, based on lithology and new geochemical data: (a) a minor …
(PDF) Lower Carboniferous post-orogenic granites in central …
The central-eastern part of the Sierra de Velasco (Sierras Pampeanas, NW Argentina) is formed by the large Huaco (40 × 30 km) and Sanagasta (25 × 15 km) granite massifs and the small La Chinchilla stock (2 × 2 km). The larger granites intrude into
Types of Rocks in Argentina: A Guide to the 7 Most Common …
Types of Rocks in Argentina: A Guide to the 7 Most Common You'll Find - Yes Dirt. Argentina is a wonderful place to hunt for agates of all colors. Jasper, hematite and …
Carlos W. Rapela
Universidad Nacional de La Plata-CONICET - Cited by 11,630 - Geochemistry - Igneous petrology - tectonics - isotope geology
(PDF) Saini-Eidukat, B., Migueles, N., Gregori, D. A., Bjerg, E. A
[Artículo] THE ALESSANDRINI COMPLEX: EARLY JURASSIC PLUTONISM IN NORTHERN PATAGONIA, ARGENTINA Bernhardt Saini-Eidukat1, Nathalia Migueles2, Daniel A. Gregori2,3, Ernesto A. Bjerg2,3, Brian L. Beard4 and Clark M. Johnson4 1 Department of Geosciences, North Dakota State University, Fargo ND 58105-5517 …
Unravelling the genetic relationship between pegmatites and granites …
The Songpan-Ganze Orogenic Belt (SGOB) is located in Southwestern China (Fig. 1).It experienced two consecutive orogenic events related to the formation of the Paleo-Tethys and Neo-Tethys oceans (Xu et al., 1992).Abundant Triassic granites and pegmatites, and large rare-metal deposits, such as Jiajika, Lijiagou, Zhawulong, and …
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Cost of Living in Argentina. Prices in Argentina. Updated …
Summary of cost of living in Argentina: A family of four estimated monthly costs are 1,756.7$ without rent. A single person estimated monthly costs are 490.3$ without rent. Cost of living in Argentina is, on average, 57.5% lower than in United States. Rent in Argentina is, on average, 82.6% lower than in United States.
Granite-related uranium deposits in Argentina: Geological …
It was determined that granites play an important role both as a uranium source and hosts of diverse types of uranium mineralization. Additionally, it is thought that, at the existing level of knowledge, there are prospects for the discovery and development of new uranium resources related to granites in Argentina.
Post-orogenic, Carboniferous granite-hosted Sn–W
In Argentina, Sn–W mineralization has been described from various Carboniferous granites in the Sierras Pampeanas orogen ( Fig. 1) such as Sierra de …
Geochronology and geochemistry of Early Cretaceous high-silica granites
More recently, using the K-Ar method, the granites in Nan'ao Island were also determined to have formed in the Late Cretaceous from 84.4 to 101.1 Ma (He and Cai, 1986, GDGBMR (Bureau of Geology and Mineral Resources of Guangdong Province),, 1988). To obtain precise ages for the granites in Nan'ao Island, we have used …
Geochemistry of K‐feldspar and Muscovite in Rare‐element …
The geochemistry of K-feldspar for K, P, Sr, Ba, Rb, Cs, Ga, and of muscovite for the same elements plus Nb and Ta, was used for proving the parental relationships of S-type granites and LCT (Li, Cs, Ta) rare-element pegmatites in the southernmost pegmatitic field of the Pampean pegmatite province in Argentina.
A conceptual model for the evolution of a magmatic system …
@article{Dahlquist2024ACM, title={A conceptual model for the evolution of a magmatic system based on U-Pb zircon studies on the Devonian granites of Sierra de San Luis, Argentina}, author={Juan A. Dahlquist and Mat{'i}Mat{'i}As M. Morales C{'a}mera and Juan A. Moreno and M.A.S. Basei and Gilmara Santos da Cruz and Elson P. Oliveira}, …