scholarly journals Recognition of a Middle–Late Jurassic arc-related porphyry copper belt along the southeast China coast: Geological characteristics and metallogenic implications

Geology ◽  
2021 ◽  
Author(s):  
Jingwen Mao ◽  
Wei Zheng ◽  
Guiqing Xie ◽  
Bernd Lehmann ◽  
Richard Goldfarb
Keyword(s):  
Late Jurassic ◽  
Porphyry Copper ◽  
Fault Zones ◽  
Southeast China ◽  
Geological Characteristics ◽  
Metallogenic Model ◽  
World Class ◽  
Definition Of ◽  
Back Arc ◽  
China Coast

Recent exploration has led to definition of a Middle–Late Jurassic copper belt with an extent of ~2000 km along the southeast China coast. The 171–153 Ma magmatic-hydrothermal copper systems consist of porphyry, skarn, and vein-style deposits. These systems developed along several northeast-trending transpressive fault zones formed at the margins of Jurassic volcanic basins, although the world-class 171 Ma Dexing porphyry copper system was controlled by a major reactivated Neoproterozoic suture zone in the South China block. The southeast China coastal porphyry belt is parallel to the northeast-trending, temporally overlapping, 165–150 Ma tin-tungsten province, which developed in the Nanling region in a back-arc transtensional setting several hundred kilometers inboard. A new geodynamic-metallogenic model linking the two parallel belts is proposed, which is similar to that characterizing the Cenozoic metallogenic evolution of the Central Andes.

scholarly journals 3D Geological Model of the Touro Cu Deposit, A World-Class Mafic-Siliciclastic VMS Deposit in the NW of the Iberian Peninsula

Minerals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 85
Author(s):  
Mónica Arias ◽  
Pablo Nuñez ◽  
Daniel Arias ◽  
Pablo Gumiel ◽  
Cesar Castañón ◽  
...  
Keyword(s):  
3D Model ◽  
Massive Sulfide ◽  
Geological Model ◽  
Drill Core ◽  
World Class ◽  
Hinge Zone ◽  
Arc Setting ◽  
Using Data ◽  
Back Arc ◽  
Host Rocks

The Touro volcanogenic massive sulfide (VMS) deposit is located in the NW of the Iberian Variscan massif in the Galicia-Trás-os-Montes Zone, an amalgamation of several allochthonous terrains. The Órdenes complex is the most extensive of the allochthone complexes, and amphibolites and paragneisses host the deposit, characterized as being massive or semimassive (stringers) sulfides, mostly made up of pyrrhotite and chalcopyrite. The total resources are 103 Mt, containing 0.41% copper. A 3D model of the different orebodies and host rocks was generated using data from 1090 drill core logs. The model revealed that the structure of the area is a N–S-trending antiform. The orebodies crop out in the limbs and in the hinge zone. The mineralized structures are mostly tabular, up to 100 m in thickness and subhorizontal. Based on the petrography, geochemistry and the 3D model, the Touro deposit is classified as a VMS of the mafic-siliciclastic type formed in an Ordovician back-arc setting, which was buried and metamorphosed in Middle Devonian.

scholarly journals TECHNOLOGICAL INNOVATIONS AT HOTEL ENTERPRISES DURING COVID-2019

2021 ◽  
Author(s):  
Tetiana Lysiuk ◽  
Anastasiia Arendarchuk ◽  
Oksana Tereshchuk
Keyword(s):  
Technological Innovation ◽  
Mobile Applications ◽  
Technological Innovations ◽  
Innovative Technologies ◽  
Internet Technologies ◽  
Hotel Chains ◽  
World Class ◽  
Definition Of ◽  
Boutique Hotels ◽  
The Voice

The article presents the results of a study of the use of technological innovations in hotel enterprises in conditions of increased competition and an unfavorable period for the hotel business. The largest and most popular world hotel chains are analyzed. The innovations introduced at hotel enterprises are studied. It has been found that all the innovations that have been introduced in recent years are related to Internet technologies. The definition of innovation by the Law of Ukraine on Innovation was provided. The directions of basic innovative activity in the tourist and hotel business were listed. The most popular innovative technologies that have started to be used by hotel enterprises in the conditions of the coronavirus pandemic are singled out and analyzed. Among the technological innovations were studied: chatbots, mobile applications for hotel chains and small boutique hotels. The introduction of digital keys instead of the use of card keys was also investigated. The novelty of the voice assistant technology, which is planned to be used by hotel rooms, was investigated. The scientific novelty of the obtained research results is the updating and generalization of information on the use of technological innovations by foreign hotel enterprises, including world-class hotel chains. The uniqueness of the article also lies in the fact that examples of hotel enterprises that actively apply this or that technological innovation in their activities were given. Thus, this information allows you to see which hotel companies are the most innovative and, consequently, competitive in the hotel market. Further research may be aimed at determining the readiness of the domestic hotel market to introduce the latest technologies, such as chatbots, digital keys, mobile applications for small and chain hotels and voice assistants in rooms. It is necessary to study especially expediently expediency of introduction of service of the voice assistant in domestic hotels, in particular in business hotels of big cities. No less carefully you need to explore the feasibility of creating your own mobile applications for small hotels.

scholarly journals Assessing potential storm tide inundation hazard under climate change: a case study of Southeast China coast

2019 ◽  
Author(s):  
Bingchuan Nie ◽  
Qingyong Wuxi ◽  
Jiachun Li ◽  
Feng Xu
Keyword(s):  
Climate Change ◽  
Tropical Cyclone ◽  
Trend Analysis ◽  
Sea Level ◽  
Coupling Effect ◽  
Storm Tide ◽  
Southeast China ◽  
China Coast ◽  
Water Elevation

Abstract. A methodology for assessing the storm tide inundation under TCI (tropical cyclone intensification) and SLR (sea level rise) is proposed, which integrates the trend analysis, numerical analysis and GIS-based analysis. In the trend analysis, the potential TCI and SLR can be estimated based on the long-term historical data of TC (tropical cyclone) and MSL (mean sea level) considering the non-stationary and spatially non-uniform effect; the numerical simulation is relied on the ADCIRC+SWAN model, which is capable of taking into account the tide-surge-wave coupling effect to improve the precision of water elevation prediction; the water elevation is then analyzed on the GIS platform, the potential inundation regions can be identified. Based on this methodology, a case study for the Southeast China coast, one of the storm surge prone areas in China, is presented. The results show that the high water elevation tends to occur in the bays and around the estuaries, the maximal water elevations caused by the typhoon wind of 100-year recurrence period can reach as high as 6.06 m, 5.82 m and 5.67 m around Aojiang, Feiyunjiang and Oujiang river estuaries, respectively. Non-stationary TCI and SLR due to climate change can further deteriorate the situation and enhance the risk of inundation there, i.e. the potential inundation area would expand by 108 % to about 798 km2 compared with the situation without considering TCI and SLR. In addition, the remotely sensed maps and inundation durations of the hardest hit regions are provided, which will aid the prevention and mitigation of storm tide inundation hazard and future coastal management there.

Pertrogenesis and tectonic implications of the late Jurassic basic rocks from the northern Shi-Hang zone, Southeast China

Island Arc ◽  
2016 ◽  
Vol 25 (3) ◽  
pp. 235-250 ◽  
Author(s):  
Qing Zhou ◽  
Yao-hui Jiang ◽  
Shi-yong Liao ◽  
Peng Zhao ◽  
Ru-ya Jia ◽  
...  
Keyword(s):  
Late Jurassic ◽  
Southeast China ◽  
Tectonic Implications ◽  
Basic Rocks

scholarly journals Relative Abundance and Compositional Variation of Silicates, Oxides and Phosphates in the W-Sn-Rich Lodes of the Panasqueira Mine (Portugal): Implications for the Ore-Forming Process

Minerals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 551 ◽  
Author(s):  
António Mateus ◽  
Jorge Figueiras ◽  
Ivo Martins ◽  
Pedro Rodrigues ◽  
Filipe Pinto
Keyword(s):  
Relative Abundance ◽  
Chemical Nature ◽  
Fault Zones ◽  
Compositional Variation ◽  
Early Cambrian ◽  
Forming Process ◽  
Mineral Deposition ◽  
World Class ◽  
Panasqueira Mine ◽  
Opening And Closing

Panasqueira is a world-class W-Sn-Cu lode-type deposit located in Portugal. It consists of a dense swarm of subhorizontal quartz lodes criss-crossed by several ENE–WSW and N–S fault zones, bordering Late Variscan granite and hosted in Late Ediacaran—Early Cambrian metasediments. The relative abundance and compositional variation (assessed with EPMA) of the main silicates, oxides and phosphates forming the quartz lodes and their margins were examined, aiming to explore: (i) mineral and geochemical zonation at the mine scale; and (ii) some conclusions on the chemical nature of prevalent fluid inflows and T-conditions of mineral deposition. Quartz lodes nearby or far from the known greisen-granite cupola display significant differences, reflecting multiple fluid influxes of somewhat distinct composition related to various opening and closing events extending for several My, ranging from an early “oxide–silicate stage” (OSS) to a “main sulfide stage” (MSS), and further on to a post-ore carbonate stage (POCS); however, a rejuvenation event occurred after MSS. The onset of OSS was placed at ca. 299 ± 5 Ma and the rejuvenation event at ca. 292 Ma. The OSS was confined to ≈500 ≤ T ≤ 320 °C, following rutile and tourmaline growth under ≈640 ≤ T ≤ 540 °C (depending on aSiO2). The rejuvenation event (≈440–450 °C) preceded a late chlorite growth (≈250–270 °C) and the progression towards POCS.

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