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Wyszukujesz frazę "Nguyen, Khac Du" wg kryterium: Autor


Wyświetlanie 1-3 z 3
Tytuł:
Mineralogical and Geochemical Characteristics of Lead-zinc Ore Deposits, and Potential Accompanying Components in the Cho Don - Cho Dien Area, Bac Kan Province, Vietnam
Autorzy:
Nguyen, Tien Dung
Nguyen, Khac Du
Nguyen, Ngoc Thom
Powiązania:
https://bibliotekanauki.pl/articles/2020105.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
Cho Don-Cho Dien Pb-Zn ore deposits
mineralogy and geochemistry
accompanying components
by-products
złoża rud
mineralogia
geochemia
Opis:
The Pb-Zn mineralization in the Cho Don - Cho Dien ore districts often occurs in 2 types: (1) oxidized ore near to the surface and (2) sulfide ore at deeper section. Based on microscopic observations, sulfide ores can be divided into sphalerite-galena-pyrite and/or galena-sphalerite mineralization types. To examine the geochemical features of the Pb-Zn ores, SEM-EDX and ICP-MS analytical methods were performed in this study. Previous δ34S data of Pb-Zn concentrates, and sulfide minerals from various deposits suggest that the Pb-Zn ore-forming fluids might be related to the felsic-granitic magmatic activities rather than a genesis of stratiform type. Geochemical data show that the major, minor, and trace element compositions of lead-zinc ores have wide ranges of variation even in each deposit. The sulfide ores are generally higher in economic components than those in the oxidized ores. The positive correlations between Pb-Ag can be found in the entire dataset, whereas excellent Zn-Cd correlation can only be observed from Cho Don ore samples. Apart from the principal components (Pb and Zn), the ores also contain other accompanying elements that supply high-technological manufacturing industries. Of which As, Cu, Ag, Sb, and Cd could be potential by-products and can be extracted during smelting Pb/Zn concentrate processes, and need more detailed studies for every deposit.
Źródło:
Inżynieria Mineralna; 2021, 2; 261--273
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Collision Between Indochina and South China Blocks in Northwestern Vietnam and its Controversy
Autorzy:
Hung, Khuong The
Golonka, Jan
Du, Nguyen Khac
Powiązania:
https://bibliotekanauki.pl/articles/27323226.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
Indochina block
South China block
collision
Indosinian orogeny
Indochiny
Chiny
kolizje
Opis:
The Indosinian orogeny, which was regarded as the collision event between the South China and Indochina blocks that occurred in Southeast Asia, including Vietnam, resulting in the formation of the Indosinian mountain range. However, the question of how many times collision between these blocks occurred in the past and during which period remains unanswered. Furthermore, the closure of the ancient ocean and the evidence of its remnants between the South China and Indochina Blocks are still the subjects of serious debate. The underlying origin of the Indosinian thermo-tectonism is uncertain. The entire region was affected by the thermal-tectonic processes in the west, caused by the collision of the Sibumasu plate and Indochina block. The absence of evidence supporting the Indosinian as a significant mountain-building event is highlighted through an examination of regional paleogeography, as well as palaeontological and thermochronological data. There is no conclusive evidence to suggest that the Indochina and South China blocks collided during the Triassic times. A plate tectonic scenario that describes the Indosinian orogeny as a reactivation event triggered by the accretion of the Sibumasu block to Indochina is favored.
Źródło:
Inżynieria Mineralna; 2023, 2; 103--112
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The eastern extension of the Avalonian terranes, the Prototethys and Paleotethys oceans
Autorzy:
Golonka, Jan
Hung, Khuong The
Du, Nguyen Khac
Krobicki, Michał
Powiązania:
https://bibliotekanauki.pl/articles/24202135.pdf
Data publikacji:
2023
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
Avalonia
Prototethys
Palaeotethys
Opis:
Avalonia was an archipelago of microcontinents divided into West and East Avalonia. West Avalonia included south-eastern parts of Nova Scotia, eastern Newfoundland, New Brunswick, Florida(?), and New England, while East Avalonia included southern Ireland, southern Scotland, England, northern France, the Brabant Massif, Lusatia, northern Germany, and north-western Poland. Several crustal fragments such as the Bruno–Silesia terrane, Moesian terranes, Istanbul/Zonguldak terrane constituted an extension of East Avalonia (Golonka et al., 2023). These microcontinents detached from Gondwana during the Early Paleozoic times. Golonka et al. (2023) also portrayed a chain of microcontinents moving away from Gondwana across the Palaeoasian (Protothetys) Ocean. These chain included Scythian, Turan, South Kazakhstan, Junggar, Tarim and Indochina. The Rheic-Palaeotethys Ocean opened behind these microcontinents. Collision occurred between Avalonia, Laurentia and Baltica during Caledonian Orogeny. This collision also included Bruno–Silesia, Moesia terranes, Istanbul/Zonguldak, Scythian and Turan terranes (Golonka & Gawęda, 2012). The events involving Junggar, South Kazakhstan and Tarim are more speculative. Indochina collided with South China along Song Ma– Truong Song–Ailaoshan suture during latest Silurian–earliest Devonian times. In northwestern Vietnam, the Late Silurian Song Chay complex granitoid is connected to this event. Moreover, the deep-water deposits such as Pa Ham formation were later replaced by shallow-water sedimentary formations, including the continental Lower Devonian red beds and Lower Devonian Nam Pia Formation composed mainly of terrigenous sediments and marl, medium-bedded to massive fine-grained limestone, representing shallow water sediments. The Lower Paleozoic greenschists of deepsea origin were unconformably covered in many localities by Devonian redbeds (Son et al., 1978; Hung, 2010; Hung et al., 2023).
Źródło:
Geotourism / Geoturystyka; 2023, 1-2 (72-73); 23--24
1731-0830
Pojawia się w:
Geotourism / Geoturystyka
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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