News Article | May 23, 2017
VANCOUVER, BRITISH COLUMBIA--(Marketwired - May 23, 2017) - Anfield Gold Corp. ("Anfield" or "Company") (TSX VENTURE:ANF) is pleased to announce the results from its last round of metallurgical testing for the Coringa Project ("Coringa" or "Project"). The results were positive, demonstrating recoveries of 98% gold and 61% silver. These results were achieved by testing a master composite representing mineralized material from the Meio and Serra zones of the Project using gravity concentration followed by carbon-in-leach ("CIL") cyanidation of the gravity tails. The master composite was a 50/50 blend of mineralized material from each zone that utilized core from 19 out of the 229 drill holes that have been completed across both zones. The master composite also responded very well to whole ore cyanidation with gold extraction rates similar to those obtained by gravity concentration followed by CIL cyanidation; however, whole ore cyanidation was shown to have 9% lower silver recoveries. Anfield anticipates using gravity concentration followed by CIL cyanidation of gravity tails in the final flow sheet for the Project's feasibility study, expected in July 2017. The metallurgical testing was undertaken by C.H. Plenge & CIA S.A. ("C.H. Plenge") at its laboratory in Lima, Peru. C.H. Plenge is not related to Anfield. On May 10, 2017, Anfield received formal consent for the Project from the Instituto Nacional de Colonização e Reforma Agrária ("INCRA"). INCRA's consent was required by the Secretaria de Estado de Meio Ambiente e Sustentabilidade ("SEMAS") as a pre-requirement to issuance of permits for the commencement of construction and operations at Coringa. Anfield continues to engage with SEMAS as the agency works to finalize and issue the required permits. Pre-construction activities at Coringa continue to advance, with the latest developments listed below: All Anfield sample assay results have been monitored through a quality control / quality assurance ("QA/QC") program including the insertion of blind standards, blanks and the reanalysis of duplicate samples. The results of the QA/QC program and the resampling program indicate that the sample database is of sufficient accuracy and precision. Nelson King, SME Registered Member and Metallurgical Consultant to Anfield, is a Qualified Person as defined by National Instrument 43-101 Standards of Disclosure for Mineral Projects. Mr. King has assisted Anfield in the development and direction of the metallurgical testing program for the Project, has visited C.H. Plenge's laboratory in Lima to observe the testing program, and has reviewed and approved the content of this press release relating to the metallurgical testing. Mr. King also verified the results of the metallurgical testing. Anfield Gold Corp. (TSX VENTURE:ANF) is a Vancouver, Canada based precious metal exploration and development company focused on the development of the Coringa Project located in Para State, Brazil. Anfield's strategic plan also includes the acquisition of other gold projects with the goal of becoming a mid-tier gold mining company. Further details are available on the Company's website at https://anfieldgold.com Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this news release. Certain statements and information herein, including all statements that are not historical facts, contain forward-looking statements and forward-looking information within the meaning of applicable securities laws. Often, but not always, forward-looking statements can be identified by the use of words such as "plans," "intends," "will" "are expected" or variations of such words and phrases. Forward looking statements or information in this press release include, but are not limited to, the rate of ore recovery at the Project, the preparation of, and timing to completion of, a feasibility study for the Project; Anfield's strategic plan to acquire other gold projects with the goal of becoming a mid-tier gold mining company, timing to completion of pre-construction activities and plan to use gravity concentration followed by CIL cyanidation of gravity tails. In making the forward-looking statements in this release, Anfield has applied certain factors and assumptions that are based on information currently available to Anfield as well as Anfield's current beliefs and assumptions (including Anfield's belief in the accuracy of the mineral resource estimate). Although Anfield considers these beliefs and assumptions to be reasonable based on information currently available to it, they may prove to be incorrect, and the forward-looking statements in this release are subject to numerous risks, uncertainties and other factors that may cause future results to differ materially from those expressed or implied in such forward-looking statements. Such risk factors include, among others, additional drilling and exploration may determine that there is no potentially viable mine plan for the Project, risks associated with the business of Anfield, risks related to reliance on technical information provided by Magellan Minerals Ltd. as related to the Project; risks relating to exploration and potential development of the Company's projects; risks related to obtaining the permits and approvals necessary to develop and commission the Project on terms that are acceptable to Anfield; risks related to Anfield identifying suitable acquisition targets; business and economic conditions in the mining industry generally; the supply and demand for labour and other project inputs; prices for commodities to be produced and changes in commodity prices; changes in interest and currency exchange rates; risks relating to unanticipated operational difficulties (including failure of plant, equipment or processes to operate in accordance with specifications or expectations, cost escalation, unavailability of materials and equipment, government action or delays in the receipt of government approvals, industrial disturbances or other job action, and unanticipated events related to health, safety and environmental matters); risks relating to adverse weather conditions; political risk and social unrest; changes in general economic conditions or conditions in the financial markets; and changes to business and economic conditions in the mining industry generally. Although Anfield has attempted to identify important factors that could cause actual results to differ materially from those contained in forward-looking information, there may be other factors that cause results not to be as anticipated, estimated or intended. There can be no assurance that such information will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on forward-looking information. Anfield does not undertake to update any forward-looking information, except in accordance with applicable securities laws.
do Nascimento P.C.,Federal University of Rio Grande do Sul |
Bissani C.A.,Federal University of Rio Grande do Sul |
Levien R.,Federal University of Rio Grande do Sul |
Losekann M.E.,INCRA |
Finato T.,Secretaria de Desevolvimeto Rural Governo do Estado do Rio Grande do Sul
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2014
Lower northeast hillside region, in Rio Grande do Sul state, Brazil, shows, in agricultural activities, variability in soil use and production systems, which can result in change of soil attributes and degradation processes. With the aim to evaluate particle size distribution and chemical attributes and to compare them in different soil use and management system, soil samples from 78 areas, performing eight diverse types of soil use in conventional and organic production systems, were sampled for the study, between 2009 and 2010. Soil samples were collected at 0 to 20 cm depth, and a series of attributes were determined. Results showed pH, electrical conductivity, zinc and phosphorus contents with higher values in areas of conventional vegetable production, while sulphur showed higher values in soil under grape cultivation. Discriminate analysis indicated that 67% of the areas were classified in the same use defined at the time of sampling (original use), and principal component analysis showed more similar behavior among uses in organic system, besides conventional crop. Some elements showed very high contents, indicating potential contamination and environmental risk.
Marangon L.C.,University of Pernambuco |
Soares J.J.,Federal University of São Carlos |
Feliciano A.L.P.,University of Pernambuco |
Lani J.L.,Federal University of Viçosa |
Revista Arvore | Year: 2013
The Mata do Paraíso is originated in regeneration, making up secondary vegetation whose typology is Semidecídua Estacional Forest. In the Zona da Mata from Minas Gerais State, the Latosols predominate and this category is, also, the most present in the Viçosa's region where the soils are, generally, nutritive poor. Thus, it was looked for associating some characteristics of soils from "Mata do Paraíso" in specified order to relationate them with the evolution of different kinds of toposequences, presents in the studied area, and the local arboreous vegetation. Samples were gathered inside the 40 parcels, the same ones utilized for the vegetation study. Samples weretaken away from 0 to 20cm, 20 to 50cm and 50 to 100cm of depth in three different points. TFSA textural analysis of the soil was performed, as well as, density of soil, pH, total organic carbonic, Ca, Mg, Al, K and P. Based on the results achieved, the sum of the basis was calculated (SP), the cationic change capacity (T) and effective (t), saturating for basis (V) and saturating for Al. The remainders P were also determinated. Using the vegetation as the best ambient indicator, it can be perceived more species at the hillside, but with small plants and, following, the Ravine, with bigger trees. On the Hillside, the soil is poorer than the Ravine's and more subordinate to laminar erosion. In this case, the natures' option would be increase the recycledefficiency by the diversity, what the species would be doing by its self benefit. The Top is too poor, that limits individuals of bigger size and diameter, as well as its self diversity. The pioneer species, in this case, would have a fundamental role in maintaining or in the "formation" of this soil fertility. The texture, it is perceived that is possible separating on the 3 depths, 2 ambient groups: on Plan e the Top present a texture more homogeneous and Ravine and Hillside more heterogeneous.
Characterization and genetic divergence of access of Passiflora edulis and p. cincinnata based on physical and chemical characteristics of fruits [Caracterização e divergência genética de acessos de Passiflora edulis e p. cincinnata com base em características físicas e químicas de frutos]
de Sousa L.B.,Federal University of Uberlandia |
Silva E.M.,INCRA |
Gomes R.L.F.,UFPI |
Lopes A.C.A.,UFPI |
Silva I.C.V.,Ciencia e Tecnologia de Alimentos
Revista Brasileira de Fruticultura | Year: 2012
The characterizations have been performed in germplasm collections to generate information about the description and classification of collected materials, to discriminate more important characters and, mainly, to subsidize genetic breeding program by identifying desirable individuals as well as quantifying the available diversity. This study aimed to characterize and quantify the genetic divergence among accessions of Passiflora edulis and P. cincinnata based on physical and chemical characteristics of the fruits. The genetic material consisted of six accessions from the Germoplasm bank of UNESP in Jaboticabal. The fruits were evaluated with respect to the following physical characteristics: weight, length and fruit diameter, rind thickness, seed number and juice yield; and chemical: total soluble solids contents and total acidity. The six accessions differed with respect to all traits, indicating the presence of genetic variability and hence the possibility of obtaining genetic gains with selection of superior genotypes. The genetic diversity among the accessions was estimated by Tocher's grouping method, and used Mahalanobis' distance as a measure of dissimilarity, forming two groups. The estimates of higher positive genetic correlations associated with the juice, were with the number of seeds/fruit, fruit diameter, fruit length and fruit weight. The method of Singh, used to estimate the relative contribution of each character in the expression of genetic divergence among the six accessions, indicated that the size of the fruit and juice yield were the characteristics that contributed most, and total acidity showed a least contribution.
Spatial variability of maximum annual daily rain under different return periods at the Rio De Janeiro State, Brazil [Variabilidade espacial da chuva máxima diária anual média e sob diferentes períodos de retorno no estado do Rio De Janeiro, Brasil]
Machado R.L.,Ceres |
Ceddia M.B.,Federal Rural University of Rio de Janeiro |
de Carvalho D.F.,Federal Rural University of Rio de Janeiro |
da Cruz E.S.,INCRA |
Bragantia | Year: 2010
Knowledge of maximum daily rain and its return period in a region is an important tool to soil conservation, hydraulic engineering and preservation of road projects. The objective of this work was to evaluate the spatial variability of maximum annual daily rain considering different return periods, at the Rio de Janeiro State. The data set was composed by historical series of 119 rain gauges, for 36 years of observation. The return periods, estimated by Gumbel distribution, were 2, 5, 10, 25, 50 and 100 years. The spatial variability of the return periods was evaluated by semivariograms. All the return periods presented spatial dependence, with exponential and spherical model fitted to the experimental semivariograms. The parameters of the fitted semivariogram model were very similar; however, it was observed the presence of higher nugget effects for semivariograms of longer return periods. The values of maximum annual daily average rain in all the return periods increased from north to south and from countryside to the coast. In the region between the Serra do Mar range and the coast, besides increasing in magnitude, an increase in the spatial variability of the studied values with increasing return periods was also noticed. This behavior is probably caused by the orographic effect. The interpolated maps were more erratic for higher return periods and at the North, Northeast and Coastal Plain regions, in which the installation of new pluviometric stations are recommended.
Mendes A.M.S.,Embrapa Semiarido |
Duda G.P.,Federal Rural University of Pernambuco |
do Nascimento C.W.A.,Federal Rural University of Pernambuco |
Lima J.A.G.,INCRA |
Medeiros A.D.L.,Secretaria Municipal de Agricultura
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2010
Soil cultivation using agrochemicals may increase the concentration of availability of heavy metals to plant and cause contamination of the trophic chain as well. This work was carried out to evaluate the influence of length of time under cultivation with melon (Cucumis melo L.) on the heavy metals accumulation and chemical alterations in Ultisol. Melon plantations of one, two and three years were studied. A benchmark area under natural vegetation was used to compare the data obtained. The results showed that the lengthiest time under cultivation altered the chemical characteristics of the soil. An increase in pH and contents of N, P and K was observed for the two soil layers evaluated. On the other hand, Ca contents were decreased by cultivation. The larger the cultivation time the higher the concentration of N, Pb, Cu, and Mn in the soil surface layer, whereas the Fe and Zn concentrations were diminished in both analyzed soil layers, though available concentrations are still regarded as low in soil.
Andrade Neto R.C.,INCRA |
Miranda N.O.,DCA UFERSA |
Duda G.P.,Federal Rural University of Pernambuco |
Goes G.B.,DCA UFERSA |
Lima A.S.,DCA UFERSA
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2010
The effect of green manure on growth and yield of forage sorghum BR 601 was studied in a trial carried out at the UFERSA, Mossoró, RN, Brazil. The experimental design was completely randomized blocks in a scheme of split plots in time, with three replications. Treatments tested were seven legume species, Mucuna aterrima, Canavalia ensiformis, Cajanus cajan, Dolichos lab-lab, Crotalaria juncea, Crotalaria spectabilis, and Vigna unguiculata, a mixture of the legumes plus corn, sorghum and sunflower, and spontaneous vegetation as a control. For each treatment the amount of fresh mass, dry mass and contents of N, P, K, Na, Ca and Mg in shoots were determined, from which the amount of nutrients accumulated per hectare was calculated. Fresh mass of shoot, dry mass of shoot, plant height and number of leaves of sorghum, sowed after incorporation of green manures, were evaluated at 20, 40, 60, 80 and 100 days after seeding. Mucuna aterrima was the best option as a green manure because of its better performance in all characteristics evaluated at the end of sorghum cycle. Also recommended are Crotalaria juncea, and Dolichos lab-lab which had the higher dry mass and amount of nutrients in shoots.