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By Jorge Acuña de la Fuente

El presente texto describe el estado actual de la fabricación del coque y del carbón como uno de los elementos químicos y fuentes de energía más importantes que intervienen en la industria siderúrgica peruana. El carbón se explota en la mayor parte de las naciones del globo. Sin embargo, una cantidad apreciable de países productores no logra satisfacer sus propias necesidades y depende en mayor o menor escaia de la importación. Con el fin de garantizar los suministros de importación, se ha generalizado la práctica de celebrar contratos a largo plazo, iniciada por los grandes países consumidores. De otro lado, el coque, es el producto residual de la destilación seca de carbones bituminosos, cuyo elevado costo ha orientado los estudios técnico-económicos sobre su elaboración hacia dos objetivos fundamentales: en primer lugar, la optimización del proceso clásico de coquificación, al desarrollar paraielamente nuevas técnicas del carbonización, y por otra parte, la variación de las fundiciones en el alto horno en pro de un menor consumo específico de coque, ya sea por reemplazo parcial de éste por otros elementos reductores, o nuevos artificios de operación.

Jul 1, 1979

By lizabeth Morales

En el período del 2006-2007 un equipo multidisciplinario de especialistas nacionales e internacionales de Walsh realizó una evaluación de las condiciones ambientales de las operaciones de la Mina Tintaya, donde se verificó la información secundaria de la operación y los procesos participativos que lleva el yacimiento, generándose recomendaciones que ayuden a resolver conflictos entre la mina y la comunidad que sean aplicables a los asentamientos mineros en desarrollo en los diferentes países. En ese sentido, el presente trabajo describe el proceso de esta evaluación para así prevenir y minimizar conflictos sociales entre la empresa y la comunidad a través de un balance de las misma por intermedio de la mesa de diálogo.

Sep 14, 2009

By Miguel Galindo, Eleuterio Rivera

Las características mineralógicas cada vez más compleja e inciertas de las distintas fases de minado, representan en general nuevos desafíos operacionales en las distintas etapas de los procesos minero-metalúrgicos: chancado, molienda, flotación, bombeo por mineroducto, filtrado y almacenamiento. Los cuales se enfocan principalmente en cumplir y optimizar la calidad final de los concentrados producidos sin incrementar significativamente los costos operativos y maximizando el uso de los recursos existentes.

Sep 29, 2023

The morning session opened at 9:00 a.m. and was presided over by Mr. Don Ross, Manager of Mines, Kaiser Steel Corporation,- Sunnyside, Utah. The first speaker was Mr. S. W. Zanolli, Partner in Law Firm of Webster and Kilcullen, Washington, D.C. Mr. Zanolli was born and raised in a coal mining community of Fredericktown, Washington County, Pennsylvania. He was educated at Washington and Jefferson College and graduate schools of the University of Pittsburgh. He served as an infantry officer in the European Theatre of operations during World War 11. He worked as' a handloader at Vesta No. 5 Mine of Jones & Laughlin during summers while attending Washington and Jefferson College. He worked at a variety of production jobs at No. 7 Mine. of Island Creek Coal Co. of Holden, West Virginia. Assigned to a variety of industrial relations assignments at Island Creek Coal' Company during 1949-51, attaining position of Supervisor of Personnel and Labor Relations. Served in many industrial relations assignments at U.S. Steel Corp. headquarters during 1953.-1967, attaining a position of Personnel Director-Heavy Products Operations. In January, 1968" he became a member of the Bituminous Coal Operators Association-as Executive Vice President. This past year he went back to practicing law and is a member of the Law Firm of Webster and Kilcullen, Washington, D.C. He is married and has five children.

Jan 1, 1973

"It is projected that the reactivity of acid generating tailings and waste rock can be minimized by reducing the access of oxygen by placing these materials under water in natural or manmade lakes. A project under the MEND and B.C. AMO Task Forces has been in progress for four years to evaluate active and historic tailing sites in B.C. and Manitoba. The sophisticated geochemistry studies conducted on the interstitial pore water has illustrated encouraging results which are discussed. The additional studies which are needed to complete the scientific database for the study sites, for achieving regulatory and public approval and for the engineering of application of this method of control are outlined.IntroductionWorld wide research effort is in progress to find the solution to the acid mine drainage problem. A great deal is known about acid mine drainage but much work is required to find economic and effective approaches to the problem. Two coordinated programs have been initiated recently in Canada: the National Mine Environment Neutral Drainage (MEND) program and the British Columbia Acid Drainage Task Force.Disposal of tailings materials under a water barrier such as a natural lake, is thought to be one solution to prevent acid generation by preventing oxygen and bacterial action on the sulphide surfaces. The deposition of reactive tailings materials under water in natural lakes has been used historically at various mines in Canada. However, there has never been a thorough review of the long and short term impacts of historic sites which may provide crucial information to understand the physical, chemical and biological processes which are taking place.This paper provides a general overview of a series of studies which examine the general biophysical characteristics and the sediment geochemistry of four lakes where subaqueous disposal has been or is currently being used for acid generating tailings. The subaqueous disposal studies have been conducted from 1989 through 1991 and were initiated and supported by both research task forces. The objectives of this paper are to summarize the history and the background information of the studies conducted, the general results obtained from each lake, an overview of the major collective results and the additional work which is required to achieve the final objective of developing criteria for applying this technology in the industry."

Jan 1, 1992

La presente investigación refiere los aspectos de salubridad en las minas de Cercapuquio, a partir del ambiente de actividad del trabajador y su desarrollo fisiológico corporal. El yacimiento minero situado en el distrito de Chongos Alto, provincia de Huancayo, departamento de Junín, tiene una altura máxima de 2400 m.s.n.m, que influye en la formación biológica del hombre andino, puesto que tanto la altitud, temperatura y atmósfera son características morfométricas constituyentes de su fisiología. Sin embargo, según un estudio realizado a los hombres de trabajo provenientes de los departamentos de Junín (89%), Huancayo(7%) y Lima, se estableció que aunque hubieron desviaciones fisiológicas (volumen de sangre,capacidad respiratoria, etc,), las posiblidades de vida en la altitud para el hombre aclimatado son las mismas que para el hombre de mar. Sobre el resultado de estas bases, se evaluaron otras características de la patología del trabajador y los trazos posibles de morbilidad, logrando reducir los altos índices de la enfermedad. Las medidas adoptadas por la minera para proteger al personal empleado fueron: Foto-fluorografía de ingreso para el personal nuevo, instrucciones sobre la alimentación, higiene y prevención de enfermedad, llenado de fichas, control integral de partos respecto de las familias ubicadas en el asentamiento minero, difusión sobre profilaxis de enfermedades, vacunación total, esterelización del agua, etc. Respecto de los índices de morbilidad, se consideraron las patologías desarrolladas en el niño y recién nacido del trabajador, tales como las infecciones respiratorias, digestivas, carenciales, las cuales respondieron de forma óptima al uso de los tratamientos moderno-hidrosalinos, dietéticos y anti-infecciosos.

Jul 20, 1957

By Madgwick J. C

Leaching column techniques and microbiological methods have been described in detail in Madgwick and Ralph (1980) and Madgwick, Ralph and Sadler (1981).Sixty-nine kilograms of copper porphyry ore (0.4 per cent Cu, 2.7 per cent Fe) (particle size 2.4-11.2 mm; 60 The effect of sodium chloride (O.6M) irrigation on bacterial leaching of Bougainville copper porphyry ore was studied.Viability of suspended Thiobacillus ferrooxidants was reduced to less than 10 cells/ml in NaCI (O.6M) compared with 10' eells/ml in dilute II,SO, (0.01 M, pll 2). Salt irrigation had no significant effect on heterotrophic and sulphur oxidizing bacteria. Increascd short term recovery of copper (145 g/tonne/ 15 days) was followed by a marked decrease in tenors to less than 20 mg/litre/day compared with an acid leach, steady release, of 110 mg/litre/day. Resumption of acid leaching restored average solution copper to 46 mg/litre/day and the viability of suspended T Ierrooxidates to 10 cells/ml.Quantitative removal of sodium ehloride from ore particles was difficult and t races of NaCI remained for more than 200 days.

Jan 1, 1982

By José Vidalón

Las aguas del río Santa son aprovechadas para la generación de la electricidad de la Central hidroeléctrica de Cañon del Pato, así como la irrigación de tierras agrícolas. Sin embargo, durante una evaluación ambiental territorial de su cuenca, se encontró algunas fuentes de contaminación por minas inactivas, depósitos de relaves y botaderos de desmonte abandonados. En ese sentido, el presente texto refiere el programa de impacto ambiental aplicado en la cuenca por el Ministerio de Energía y Minas. De acuerdo a este monitoreo, se concluyó que pese al desemboque de otros efluentes contaminantes, la calidad del agua cumple con las clases de la ley general de las aguas y puesto que tiene una capacidad de neutralización de las sustancias ácidas. Asimismo, en los puntos de las cuencas aguas abajo de operaciones minero metalúrgicas que utilizan cianuro, el contenido del reactivo es menor al establecido por ley y es apto para consumo doméstico y riegos agrícolas.

Sep 13, 2001

By Luis Palomino

El siguiente estudio indica la importancia de la función que ejerce el Departamento de entrenamiento en la Cerro de Pasco Corporation. Para ello, la compañía reconoce el entrenamiento como herramienta básica en el aumento de la producción y reducción de costo, al tiempo que el Departamento asegura el perfeccionamiento de su personal de toda índole. En esta primera etapa de planeamiento, se proponen las siguientes actividades: orientación de nuevos servidores, entrenamiento de supervisores, curso de pre-capataces, curso de instructores, cursos técnicos, cursos vacacionales para universitarios, cursos por correspondencia y clases de castellano. Concluyendo que dicho programa, aumenta el rendimiento de los trabajadores, les crea conciencia y a su vez desarrolla actitudes proactivas, así como se destaca el adiestramiento de los supervisores sobre la técnica de enseñar a sus obreros, y por último, busca que cada compañía elabore su propio programa de acuerdo a sus necesidades de su entrenamiento y según las características de su personal.

Jul 20, 1955

By Luis Haro Chávez

"El presente trabajo describe el proyecto del depósito de relaves aplicado a una presa de taludes en Asnapampa a través del método Paddock en la quebrada del mismo nombre. El método consiste en la construcción de una presa por dos etapas, siguiendo las elevaciones progresivas y manteniendo el eje central de la presa. Cabe precisar que esta metodología solo es aplicable en zonas donde las altas temperaturas permiten una evaporaciónrápida del agua de relaves. En este sentido, es factible la construcción de este depósito de relaves emplazándolo en la quebrada del mismo nombre y a orillas del rio Marañón, puesto que el nivel de balance de aguas es mínimo, y el potencial de licuefacción no está presente. Asímismo, las obras de defensa ribereña permitirán asegurar su estructura ante el fenómeno de erosión y socavamiento y se podrá recuperar terreno al río para incorporar mayor área disponible para el depósito, redundando en mayor capacidad de almacenamiento."

Jul 31, 2003

By Benigno Ramos

Dado que los minerales polimetálicos son de naturaleza compleja, su procesamiento técnico económico depende de la mineralogía de la mena y las propiedades físico-químicas de cada especie individual frente al proceso de flotación En ese sentido, el método de tratamiento más común es el de flotación bulk Pb-Cu, seguido de la flotación de minerales de zinc: donde el concentrado bulk Pb-Cu es separado, obteniéndose concentrados comerciales de Cu, Pb y Zn. Si bien es cierto que los dos métodos son potencialmente impactantes, es el bicromato de sodio Na2Cr2O7 el que suscita serios cuestionamientos en la población rural y legislación ambiental. Por ello, el presente texto plantea la eliminación del uso del bicarbonato de sodio en los procesos de separación cobre y plomo, deprimiendo galena con metabisulfito de sodio / cemento Pórtland / carboximetilcelulosa, reemplazando al actual depresor RCS (bicromato de sodio / silicato de sodio / carboximetilcelulosa) y metabisulfito de sodio.

Jul 31, 2003

By E. A. Schmidt

The Thompson Creek molybdenum deposit is located in the Bayhorse mining district about 20 air miles southwest from Challis, Idaho. Cyprus Mines Corporation began exploration on the property in 1968, and at present is in the pre-production stripping phase. Molybdenum mineralization is contained in a late Cretaceous (88 m.y.), composite, biotite granodiorite-quartz monzonite intrusive complex. The complex intruded carbonaceous argillites, causing local silicification and hornfelsing of the sedimentary rocks. The main portion of the orebody is unconformably overlain by up to 1000 ft of Challis volcanic rocks (49 m.y.). Surface mineralization and related rock alteration can be recognized over a 2500- x 8000-ft area extending northwesterly from the discovery outcrop. Molybdenite occurs in a network of subparallel quartz-biotite-muscovite-orthoclase veins and veinlets within the intrusive rocks. The zone of +0.020/0 Mo mineralization outlines a steeply dipping tabular configuration in the main orebody and gradually changes into a hood-shaped configuration along strike to the northwest. The overall grade [ ] of the deposit is controlled by the abundance of the quartz- molybdenite veins and veinlets in the intrusive rock. Very little disseminated mineralization is present, and no economic mineralization occurs in the argillaceous sedimentary rocks. Muscovite, biotite, and orthoclase/microcline define three alteration zones that conform with the overall zone of mineralization. The upper alteration zone contains dominantly muscovite and sericite associated with quartz veins. The central zone contains coarse biotite and locally orthoclase and microcline. Molybdenite is most abundant within this zone. The lower zone contains thin envelopes of orthoclase/microcline around quartz veins. Based on about 313,000 ft of drilling and 8592 ft of underground development work, computer-derived ore reserve calculations indicate 200 million tons averaging 0.1 1% Mo at a 0.050/0 Mo cutoff grade with a waste to ore stripping ratio of about 3:l.

Jan 1, 2013

A recently developed technique for use in collieries is described in which samples of gas of relatively high vitiation value are obtained from points deep within a developing goaf by means of pipes. This technique prevents dilution of small quantities of carbon monoxide by large quantities of fresh ventilation air and eliminates interference from shotfiring gases. By using the technique it should be possible to assign a characteristic ratio of carbon monoxide to oxygen consumed to any district and to predict the onset of heatings.INTRODUCTIONGas analysis has played a vital role in detecting heatings in collieries all over the world. By analysing return air from a district and by calculating the percentage ratio of volume of carbon monoxide found to oxygen consumed (known simply as the "carbon monoxide ratio") it has been found possible, in many cases, to assign a characteristic ratio to a district under consideration. This characteristic ratio serves as an index of the spontan~ous combustion tendency of a goaf area. Any definite and consistent increase in the ratioabove the normal figure· indicates that a heating is developing and hence adequate preparations may be made to deal with the trouble.This ratio technique was developed by Graham (1920-21) who found (Table 1) that the temperature of oxidizing coal was directly related to the ratio obtained from analyses of the effluent gas.Until recently, most attempts to employ a similar technique in collieries working the Greta Seam (N.S.W.) were not successful. From experience gained over the past few...

Jan 1, 1961

By M. Prats

This paper presents a method for obtaining the correct values of the breakthrough sweep efficiency of the staggered line drive, taking into account the proper shape of the breakthrough streamline. Results obtained were different from those previously published, which were obtained by using an inexact shape of the breakrhrough streamline. INTRODUCTION In Section 9.31 of Muskat's' The Flow of Hotnogeticous Fluids Through Porous Media, it is stated that in a staggered line drive flood "the streamline of highest average velocity [is] the line of centers between input and output wells" (see Fig. I). Muskat used this concept to determine the relationship between the breakthrough sweep efficiency and the geometry of the staggered line drive pattern. Although it is clear from symmetry considerations that the breakthrough streamline passes through the midpoint between input and output wells, it is equally clear, as shown in Fig. 239 of Ref. 1, that the breakthrough streamline is not represented very well by the straight line joining the input and output wells. Therefore, it is desirable to determine the proper relationship between the breakthrough sweep efficiency and the pattern geometry by using the proper shape of the breakthrough streamline. METHOD OF SOLUTION It was found that the effect of the geometry of the staggered line drive on the breakthrough sweep efficiency can be investigated easily by making use of the method developed in Ref. 2. With this method, it can be shown that the general complex potential for the staggered line drive, which can be considered as a rectangular five-spot, is given in the coordinate system of Fig. 1, by O(z) = In cn(z\m) = +(x,y) + i $(x, y) . (1) where z = x + iy, +(x, y) is the potential distribution and $(x, y) is the stream function. The function cn (zm) is a Jacobian elliptic function of parameter m and has simple zeros at z,. = (2n + 1) K + 21iK and simple poles at z, = 2nK + (21 + 1)iK. Thus, the complex potential behaves like a(z) = ln(z - zr.) in the neighborhood of the production wells and behaves like a(z) = - ln(z - Z,) in the neighborhood of the injection wells. Since (z - z1.v) = rll.ei, we note that the potential + has the proper logarithmic behavior near the two wells, while the stream function $ varies with the angle, decreasing clockwise around the production well and increasing clockwise around the injection well. The functions K(m) and K'(tn), related by K(m) = K'(m,), where m + m, = 1, are known as the complete elliptic integrals of the first kind. By use of other properties of the Jacobian elliptic functions, the general stream function distribution for the staggered line drive can be obtained from Eq. 1: From the Jacobian elliptic function values, sn(0lm) = 0 dn(O(m) = cn(0jm) = 1, and f[K'(m)Iml = 03, it follows that the stream function given by Eq. 2 satisfies the proper symmetry conditions near a production well P located at [K(m), 01 and an injection well I located at [0, K' (m)]. That is, the line IOP in Fig. 1 is a streamline with value G (0. 0) = -0. and the straight lines connecting I and P to the point [K(m), K' (m)] is a streamline of value $[K(m), K' (m)] = -7/2. Similar symmetry conditions are obtained near other wells. It should be nuled that for m = m1, = 0.5, Eq. 2 reduces to the stream function distribution of the regular five-spot given in Ref. 7. SHAPE OF THE BREAKTHROUGH STREAMLINE It is apparent, from symmetry considerations, that the breakthrough streamline ($,) passes through the point [K(m)/2, K' (m)/2]. Its value there is so that the shape of the breakthrough streamline $,, is given by

Jan 1, 1957

By Miguel Tapia

El presente texto señala la geología del depósito de pórfido cuprífero Spence, localizado en la segunda región, norte de Chile, desierto de Atacama. Asimismo, el depósito Spence está emplazado en stocks y diques de composición cuarzo-monzonítica a granodiorítica de edad paleocena que intruyen a secuencias volcánicas y volcanoclásticas de edad Jurasico Superior a Cretácico Inferior (formación Quebrada Mala). El depósito se encuentra totalmente cubierto por gravas y presenta un característico perfil de mineralización de un pórfido cuprífero: zona de lixiviación, óxidos de cobre supérgenos, sulfuros de enriquecimiento y sulfuros hipógenos. Distintos eventos de lixiviación-enriquecimiento supérgeno son responsables del cobre secundario existente en el sistema. En ese sentido, el pórfido QFP1 es responsable del mayor desarrollo de mineralización de cobre en las zonas supérgenas e hipógena. A este pórfido se asocian las zonas lixiviadas de alto contenido hematítico. Goetita se concentra en los bordes del depósito y jarosita ocurre en las zonas lixiviadas que presentaban un alto volumen de pirita.

Apr 22, 2003

President-Mrs Robert D Coombs, 375 Paramus Road, Paramus, N J First Vice-President-Mrs Howard R Norsworthy, 333 East 53 Street, New York 22, N Y Second Vice-President-Mrs Arthur Notman, Circle Road, Dongan Hills, Staten Island 4, New York Third Viee-President-Mrs David Eugene Park, 30 Sutton Place, New York 22, N Y Fourth Vice-President-Mrs Cony T Brown, 211 East Abeyta Avenue, Socorro, New Mexico Fifth Viee-President-Mrs J A Carpenter, 245 University Terrace, Reno, Nevada Recording Secretary-Mrs W McG Peirce, 7 Lexington Avenue, New York 10, N Y Asst Recording Secretary-Mrs Arnold H Miller, 601 West 115 Street, New York 25, New York Corresponding Secretary-Mrs Theodore Nagel, 76 Remsen Street, Brooklyn 1, New York Treasurer-Mrs Robert W Rowen, 116 East 68 Street, New York 21, N Y Assistant Treasurer-Mrs Samuel H Dolbear, 11 Broadway, New York 4, N Y Assistant Treasurer-Mrs H A Kursell, 12 Murray Hill Road, Scarsdale, New York

Jan 1, 1955

By P. Scinto, A. Festa

"Orway Mineral Consultants Ltd (OMC) as a consultancy has specialized in comminution circuit design for over 30 years. The OMC Power Model is OMC’s in-house software for specific grinding energy power-based circuit calculations. The model uses ore hardness parameters from testwork, circuit configuration, equipment geometry and operating conditions as inputs. The model combines proprietary and published power models to predict the total specific energy and the specific energy for each of the components of the comminution circuit. This makes the software a valuable tool for the design and validation of JKSimMet modelling or actual plant performance. Proprietary calculations have been developed and reconciled with over 100 plant benchmark projects encompassing a variety of comminution circuit configurations.This paper describes the OMC approach for determining power requirements for the design of grinding circuits. The accuracy of the OMC Power Model software is confirmed through plant survey benchmark performance and comparisons are made with other power modelling techniques. Practical examples are presented, showing applications for single stage SAG (SS-SAG), SAB and SABC circuit configurations.IntroductionConventional low throughput grinding options, consisting of multi-stage crushing followed by rod and ball mills, have almost become obsolete in the move to higher milling rates required to process lower metal grades. Grinding circuits with fully autogenous (AG) or semi-autogenous (SAG) mills, often combined with ball mills are now the standard to meet the high capacity requirement for processing ores with lower metal grades. Simulation software and power-based equation methodologies have been established for designing AG/SAG based grinding circuits and predicting their energy requirements.Presently, power-based equations remain the principal method for designers to size mills and estimate the power requirement for comminution circuits. The technique is simple and it relies on the design to specify a feed and product size plus a hardness index to produce a specific energy value (kWh/t). The desired throughput of the mill is multiplied by the specific energy to give the mill power requirement, which is used in turn to size a mill for dimensions, internal geometry and loading conditions to match the power draw."

Jan 1, 2015

By L. L. Wyman

THE exact nature of the changes that take place in the iron-nickel alloys, giving rise to the interesting and useful expansion alloys in the Invar range, has yet to be fully understood. Similarly, the ternary iron-nickel-cobalt alloys, which also possess such commercially useful expansion characteristics, 1,2 are concerned with transformations that appear to be identical with those found in the parent iron-nickel alloys. The investigations on iron-nickel alloys in the range 26 to 29 per cent Ni have been reported by several authors" wherein it is shown that there are factors other than temperature, such as stress and grain size, which play an important part in determining the temperature at which the low-temperature transformation takes place. It will be shown in this paper that the ternary iron-nickel-cobalt alloys having nickel contents comparable to the alloys mentioned above behave in a parallel manner. The alloys in the range of 26 to 31 per cent Ni and 16 to 21 per cent Co have a coefficient of expansion of about 4.0 X 10-1 per degree Centi-grade, and the alloys in this range of composition find considerable application in making glass-to-metal seals, because these expansion properties so well match commercial glasses. The behavior of these alloys is not a simple matter, for it has been observed in alloys of 28.5 per cent Ni and 18.5 Co that severe working can cause the appearance of a second phase having a needlelike structure similar to the martensite structure in carbon steels. Fig. 1 shows the change brought about in an alloy of this composition when a strip of this material was cut with tin shears. This second phase has been identified as the body-centered cubic alpha phase, and it is the purpose of this paper to describe the results of some of the preliminary investigations in the study of the changes involved in these alloys.

Jan 1, 1939

Provide long-term measurement of mine sidewall closure in backfilled stapes subject to flooding. Approach A water resistant extensometer is made by enclosing a rod-actuated transducer in a telescoping tube which is enclosed within an oil-filled outer housing. How It Works To assemble a water resistant extensometer, a cylinder -shaped transducer and two support rings are pushed into the small-diameter section of the telescoping tube where the transducer is held in place by friction. The outside of the small-diameter section of the telescoping tube is then greased and slid into the slightly larger-diameter section. See drawing. The cylinder-shaped transducer contains a potentiometer whose actuating arm is attached to a stainless steel extension rod that passes through one end of the telescoping tube. A similar rod is attached to the opposite end of the transducer body, and extends through the other end of the telescoping tube. A coil spring inside the large diameter end of the telescoping tube extends the tube

Jan 1, 1978

By Avery H. Reed

RECORD production of cement, clays, salt, sand and gravel, and stone highlighted the mineral industry of the State in 1956. Coal and iron-ore production declined owing to increased imports of foreign iron ore and decreased demand for metallurgical coke. Alabama ranked second in production of bauxite and of native asphalt, and third in output of iron ore. New developments in the State included the Citronelle oilfield and its 97 wells, which more than doubled the total production of petroleum compared with 1955. There is no question about the impetus that field has given to the oil and gas industry in Alabama, now 13 years old. The State's 4 oilfields are in southwest Alabama and its 1 gasfield is in Marion County, in the Warrior coal basin.

Jan 1, 1958