(Table 1) Deuterium ratios, chloride content and hydrate volume of pore water and hydrate meltwater from ODP Site 164-996

Site 996 is located above the Blake Diapir where numerous indications of vertical fluid migration and the presence of hydrate existed prior to Ocean Drilling Program (ODP) Leg 164. Direct sampling of hydrates and visual observations of hydrate-filled veins that could be traced 30-40 cm along cores suggest a connection between fluid migration and hydrate formation. The composition of pore water squeezed from sediment cores showed large variations due to melting of hydrate during core recovery and influence of saline water from the evaporitic diapir below. Analysis of water released during hydrate decomposition experiments showed that the recovered hydrates contained significant amounts of pore water. Solutions of the transport equations for deuterium (d2H) and chloride (Cl-) were used to determine maximum (d2H) and minimum (Cl-) in situ concentrations of these species. Minimum in situ concentrations of hydrate were estimated by combining these results with Cl- and d2H values measured on hydrate meltwaters and pore waters obtained by squeezing of sediments, by the means of a method based on analysis of distances in the two-dimensional Cl- d2H space. The computed Cl- and d2H distribution indicates that the minimum hydrate amount solutions are representative of the actual hydrate amount. The highest and mean hydrate concentrations estimates from our model are 31% and 10% of the pore space, respectively. These concentrations agree well with visual core observations, supporting the validity of the model assumptions. The minimum in situ Cl- concentrations were used to constrain the rates of upward fluid migration. Simulation of all available data gave a mean flow rate of 0.35 m/k.y. (range: 0.125-0.5 m/k.y.).

Unauthorized immigration and immigration reform : present trends and prospects /

Cover title.

CIREFCA : at the crossroads between uprooted people and development in Central America /

Cover title.

Mexican manufactured exports and U.S. transnational corporations /

"March 1990."

Trade policy and export activity in the Mexican manufacturing sector /

Cover title.

The impact of IRCA on the migration patterns of a community in Los Altos, Jalisco, Mexico /

"June 1990."

Immigration from Central America : some thoughts on its causes and cures /

"July 1989."

Development assistance strategies and emigration pressure in Europe and America /

Includes bibliographical references (p. [14]-16).

The Communist war on religion.

Mode of access: Internet.

Art and faith.

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Unauthorized migration : addressing the root causes : research addendum, 1987-1990.

Shipping list no.: 90-502-P.

Unauthorized migration : addressing the root causes : research addendum, 1987-1990 : supplement

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International Congress of Arts and Science.

Contents.--v. 1. Philosophy and metaphysics.--v. 2. Aesthetics and mathematics.--v. 3. History and law.--v. 4. Law and religion.--v. 5. History of language.--v. 6. Literature and art.--v. 7. Physics and chemistry.--v. 8. Astronomy and earth sciences.--v. 9. Biology.--v. 10. Anthropology and mental science.--v. 11. Medicine.--v. 12. Medicine and technology.--v. 13. Economics and social regulation.--v. 14. Jurisprudence and social science.--v. 15. Secular and religious education.

Christianity and mankind : their beginnings and prospects /

v. 1-2. Hippolytus and his age; or, The beginnings and prospects of Christianity.--v. 3-4. Outlines of the philosophy of universal history, applied to language and religion.--v. 5-7. Analecta ante-nicaena.