Evaluación de la calidad del medio ambiente marino en la Bahía de Pisco - Paracas, 22 a 24 de mayo 1996

Se da a conocer los resultados de la evaluación de la calidad del medio marino realizada en la bahía Pisco - Paracas, del 22 al 24 de mayo (época de actividad pesquera), con el objetivo de conocer las implicancias de los cambios bruscos en el estado de calidad del ambiente marino, producto de la actividad más importante de la zona (producción de harina y aceite de pescado), ya que esta origina gran cantidad de materia orgánica en suspensión y otros residuos que son arrojados al mar.

Carbon and oxygen isotope study of hydrothermal carbonates in the zinc-lead deposits of the San Vicente district, central Peru: A quantitative modeling on mixing processes and CO2 degassing

Carbon and oxygen isotope studies of the host and gangue carbonates of Mississippi Valley-type zinc-lead deposits in the San Vicente District hosted in the Upper Triassic to Lower Jurassic dolostones of the Pucara basin (central Peru) were used to constrain models of the ore formation. A mixing model between an incoming hot saline slightly acidic radiogenic (Pb, Sr) fluid and the native formation water explains the overall isotopic variation (delta(13)C = - 11.5 to + 2.5 parts per thousand relative to PDB and delta(18)O = + 18.0 to + 24.3 parts per thousand relative to SMOW) of the carbonate generations. The dolomites formed during the main ore stage show a narrower range (delta(13)C = - 0.1 to + 1.7 parts per thousand and delta(18)O = + 18.7 to + 23.4 parts per thousand) which is explained by exchange between the mineralizing fluids and the host carbonates combined with changes in temperature and pressure. This model of fluid-rock interaction explains the pervasive alteration of the host dolomite I and precipitation of sphalerite I. The open-space filling hydrothermal white sparry dolomite and the coexisting sphalerite II formed by prolonged fluid-host dolomite interaction and limited CO2 degassing. Late void-filling dolomite III (or calcite) and the associated sphalerite III formed as the consequence of CO2 degassing and concomitant pH increase of a slightly acidic ore fluid. Widespread brecciation is associated to CO2 outgassing. Consequently, pressure variability plays a major role in the ore precipitation during the late hydrothermal events in San Vicente. The presence of native sulfur associated with extremely carbon-light calcites replacing evaporitic sulfates (e.g., delta(13)C = - 11.5 parts per thousand), altered native organic matter and heavier hydrothermal bitumen (from - 27.0 to - 23.0 parts per thousand delta(13)C) points to thermochemical reduction of sulfate and/or thiosulfate. The delta(13)C- and delta(18)O-values of the altered host dolostone and hydrothermal carbonates, and the carbon isotope composition of the associated organic matter show a strong regional homogeneity. These results coupled with the strong mineralogical and petrographic similarities of the different MVT occurrences perhaps reflects the fact that the mineralizing processes were similar in the whole San Vicente belt, suggesting the existence of a common regional mineralizing hydrothermal system with interconnected plumbing.

Junassa 5.8.-24

Kirje 5.8.1924

Kaanaassa 27/11 -24

Kirje 27.11.1924

Doktor Erik Tawaststjerna 24.1.1960 Härstädes

Kirje

Motor Vechicle Crash Fatalities for Week Ending, April 24, 2009

Motor Vehicle Crash Fatalities

EPI Update, April 24, 2009

Weekly newsletter for Center For Acute Disease Epidemiology of Iowa Department of Public Health.

[Saksan Demokraattisen Tasavallan Valtion Neuvoston Puheenjohtajan Willi Stophin valtiovierailu Suomeen 22.-25.10.1974] (Tasavallan Presidentin vastauspuhe puheenjohtaja Stophin tarjoamilla juhlapäivällisillä 24.10.1974 = Ansprache des Präsidenten der Republik beim Grand Diner gegeben dem Vorsitzenden des Staatsrates Stoph am 24.10.1974)

Puhe

Exploración de peladilla y distribución de cardúmenes de anchoveta 24 - 25 de febrero 1972

Manifiesta escadez de los recursos peladilla y anchoveta hasta fines de la temporada de pesca, el 16 de diciembre de 1971, en casi todo el litoral.

Tercer crucero del barco de exploración científica Profesor Mesiatsev (VNIRO) 24 de octubre - 6 de diciembre 1972. Investigaciones científico-pesqueras en las aguas del Océano Pacífico aledañas a la costa del Perú durante la primavera de 1972

Da a conocer las condiciones hidrológicas, características hidroquímicas, distribución del estado biológico de los peces frente a la costa y estudia las corrientes en las aguas peruanas durante la primavera de 1972.

Relocation Assistance and Advisory Services, March 24, 2009

This brochure provides general information about relocation assistance provided by the Iowa Department of Transportation (DOT) for those individuals who may be required to move as a result of a highway project. It is not intended to be a legal document that comprehensively explains every right or obligation you have as established by Chapter 316, Code of Iowa; Federal Public Laws 91-646 and 100-17; and 49 CFR. Your relocation adviser will provide the assistance you need to successfully relocate to a suitable replacement property. Your first contact with your relocation adviser will usually occur during the early stages of the appraisal process, and he or she will continue to work with you until you have moved and become established at a new location. Do not hesitate to ask questions so you are sure you understand the process, your rights and the benefits available to you. Please let your DOT relocation adviser know your needs and preferences. If your relocation adviser is unable to help you with a specific problem or concern, he or she may know of another person or an organization that can help you. DO NOT MOVE UNTIL YOU HAVE CONTACTED YOUR DOT RELOCATION ADVISER. Only then will you be sure you are not jeopardizing your potential rights and benefits under this program. No person who lawfully occupies real property will be required by DOT to move without being notified in writing at least 90 days in advance.