Dynamics of carbon and CO<Subscript>2</Subscript> removals by Brazilian forest plantations during 1990–2016     

Carlos Roberto Sanquetta  Ana Paula Dalla Corte  Allan Libanio Pelissari  Margarida Tomé  Greyce Charllyne Benedet Maas  Mateus Niroh Inoue Sanquetta 《Carbon balance and management》2018,13(1):20

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Earthquake early warning for Portugal: part 1 - Where does it matter?     

Silva  Vitor  Taherian  Amir  Oliveira  Carlos Sousa 《Bulletin of Earthquake Engineering》2022,20(11):5545-5565

Bulletin of Earthquake Engineering - In the last five centuries, Portugal was affected by several earthquakes of strong magnitude (M &gt; 7) that caused widespread destruction and a...  相似文献   

Assessment of Lateritic Gravelled Materials for Use in Road Pavements in Cameroon     

Foko Tamba  Carlos  Kengni  Lucas  Tematio  Paul  Manefouet  Bertile Ilalie  Kenfack  Jean Victor 《Geotechnical and Geological Engineering》2022,40(8):4195-4215

Geotechnical and Geological Engineering - Early surface and structural deterioration of new pavements are becoming increasingly perceptible in Cameroon. This raises serious concerns regarding the...  相似文献   

The experimental incorporation of Fe into talc: a study using X-ray diffraction,Fourier transform infrared spectroscopy,and Mössbauer spectroscopy     

Juan Carlos Corona  David M. Jenkins  M. Darby Dyar 《Contributions to Mineralogy and Petrology》2015,170(3):1-15

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Erratum to: A consistent combination of GNSS and SLR with minimum constraints     

Susanne Glaser  Mathias Fritsche  Krzysztof Sośnica  Carlos Javier Rodríguez-Solano  Kan Wang  Rolf Dach  Urs Hugentobler  Markus Rothacher  Reinhard Dietrich 《Journal of Geodesy》2015,89(12):1181-1182

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Phase equilibrium modelling of the amphibolite facies metamorphism in the Yelapa-Chimo Metamorphic Complex,Mexico     

Fabian Gutierrez-Aguilar  Peter Schaaf  Gabriela Solís-Pichardo  Gerardo F.Arrieta-García  Teodoro Hernandez-Trevino  Carlos Linares-Lopez 《地学前缘(英文版)》2021,12(1):293-312

The Yelapa-Chimo Metamorphic Complex forms part of the Jalisco Block in western Mexico and exposes a wide range of Early Cretaceous metamorphic rocks;such as paragneiss,orthogneiss,amphibolites,and migmatites.However,the pressure-temperature(P-T)conditions of metamorphism and partial melting remain poorly studied in the region.To elucidate metamorphic P-T conditions,phase equilibrium modelling was applied to two sillimanite-garnet paragneisses,one amphibole-orthogneiss,and one amphibolite.Sillimanite-garnet paragneisses exhibit a lepidoblastic texture with a biotite+sillimanite+kyanite+garnet+quartz+plagioclase+K-feldspar mineral assemblage.Amphibole-orthogneiss and amphibolite display a nematoblastic texture with an amphibole+(1)plagioclase+quartz+(1)titanite assemblage and an amphibole+(2)plagioclase+(2)titanite+ilmenite retrograde mineral assemblage.Pseudosections calculated for the two sillimanite-garnet paragneiss samples show P-T peak conditions at~6-7.5 kbar and~725-740℃.The results for amphibole-orthogneiss and the amphibolite yield P-T peak conditions at~8.5-10 kbar and~690-710℃.The mode models imply that metasedimentary and metaigneous units can produce up to~20 vol%and~10 vol%of melt,respectively.Modelling within a closed system during isobaric heating suggests that melt compositions of metasedimentary and metaigneous units are likely to have direct implications for the petrogenesis of the Puerto Vallarta Batholith.Our new data indicate that the Yelapa-Chimo Metamorphic Complex evolved through a metamorphic gradient between~23-33℃km^-1and the metamorphic rocks formed at depths between~22 km and~30 km with a burial rate of~2.0 km Ma^-1.Finally,the P-T data for both metasedimentary and metaigneous rocks provide new constraints on an accretionary framework,which is responsible for generating metamorphism and partial melting in the YelapaChimo Metamorphic Complex during the Early Cretaceous.  相似文献   

Source component mixing controls the variability in Cu and Au endowment along the strike of the Eastern Andean Cordillera in Peru     

Thomas?AngererEmail authorView author&#;s OrcID profile  Anthony?I.?S.?Kemp  Steffen?G.?Hagemann  Walter?K.?Witt  Jo?o?O.?Santos  Christian?Schindler  Carlos?Villanes 《Contributions to Mineralogy and Petrology》2018,173(5):36

Mississippian arc magmatic suites of the Au-rich Pataz and Cu-dominated Montañitas regions in Peru reveal distinct modes of magmatic-hydrothermal petro- and metallogenesis. The distinction is remarkable due to their broad contemporaneity (336–322 Ma), arc-parallel position, and close distance (<?50 km) to each other. In both arc regions, petrography, geochemistry, and the tectonic setting of magmatic suites suggest a rapid switch from syn-collisional/compressional to post-collisional/extensional (with ‘A₂-type’ signature) emplacement regime. Rocks of the Au-rich Pataz region originate from mixed sources with a contribution from the mantle (εHf?>?0 and δ¹⁸O of ~?5.3‰) and assimilated old crust (variously low εHf and δ¹⁸O >?5.3‰). The ultimate source of Au in the mineralised Pataz batholith was oxidised (fO₂ at FMQ buffer; based on zircon trace chemistry) and alkali-, LILE- and HFSE-enriched, most likely represented by the metasomatised mantle. The syn-extensional emplacement of the relatively reduced (ΔFMQ?<?0), but unmineralised, A₂-type suite involved assimilation of reduced crust. Associated, reduced, magmatic-hydrothermal fluids infiltrated the Au-bearing batholith suite and effectively mobilised and transported and concentrated Au. In the Montañitas region, rocks are oxidised (ΔFMQ?>?0) and dominantly mantle derived without significant incorporation of crustal material. Samples from the Cu-mineralised suites indicate the additional contribution of a δ¹⁸O <?5.3‰ source, potentially melted layer-2 gabbro. In addition, the elevated whole-rock La/Yb and Sr/Y ratios are compatible with minor addition of slab-derived material, which may have enhanced Cu endowment in this region. Late-magmatic, oxidised fluids derived from the younger A₂-type suite controlled Cu mobilisation and concentration, while Au behaved largely refractory. In general terms, it is postulated that source mixing in continental arcs is a first-order control of contrasting Cu and Au endowment and that sequential intrusion processes facilitate late-magmatic-hydrothermal mobilisation and concentration of specific metal assemblages.  相似文献   

A View on the Limiting City Expansion: Inner-City Attraction Issues through Linear Correlation     

Carlos Alberto Tello 《资源与生态学报(英文版)》2017,8(6):628-634

Current inner-city¹ depopulation coupled with significant peripheral expansions disrupting nature, are the rule in many of the world’s large cities such as Montreal. Expansion needs to be balanced from the inner-city attraction perspective. To deal with that objective and following an inductive process in the scientific method, two field surveys were implemented in one of Montreal’s inner-city most popular neighbourhoods (Sainte-Marie) for measuring its current attraction power. Results expose that current local residential housing/services improvement in terms of their medium to high needs/impedances² linear correlations to achieve it discourage people to continue living in Sainte-Marie on a “free will” basis. This report concludes that limiting city expansion at least through this inner-city neighbourhood’s attraction level is still very much a myth.  相似文献   

Guest editorial: old masonry under seismic loading     

Carlos Sousa Oliveira  Anibal Costa 《Bulletin of Earthquake Engineering》2012,10(1):1-5

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Ozone Weekend Effect Analysis in Three European Urban Areas     

José Carlos M. Pires 《洁净——土壤、空气、水》2012,40(8):790-797

This paper aims to apply statistical procedures to analyse the ozone weekend effect (OWE) in three European urban areas: Lisbon, Oporto and London. Seasonal variations of surface ozone (O₃) and total oxidant species (O_x) concentrations are presented. The studied period was from January 2007 to December 2009. The O₃ annual average profile in London was significantly different from the ones achieved for Lisbon and Oporto, due to the high emissions of nitrogen oxides and low temperatures (associated with low solar radiations). The influence of nitrogen oxides in atmospheric chemistry of London was analysed by linear correlations between O₃ concentrations and NO₂/NO ratio. High values during almost all period showed that O₃ concentrations are mainly influenced by NO? NO₂? O₃ chemical reaction. On the other hand, the linear correlations between O₃ and NO₂ concentrations only presented positive values in Lisbon and Oporto. This behaviour is associated with photo‐dissociation of NO₂, producing O₃ during the spring and summer periods. Additionally, cluster analysis was applied to group the days of week according the correspondent O₃ behaviour. The weekend and some weekdays (immediately after or before) were grouped in the same cluster, showing that OWE occurs in all urban areas selected in this study. These findings suggest that the applied statistical procedures should be used to analyse the OWE and that the causes for the different O₃ behaviours during the week may be influenced by meteorological variables.  相似文献