Bulk geochemistry, mass change and alteration intensity of basalts from ODP Leg 187 sites and survey dredges

Shipboard studies during Ocean Drilling Program Leg 187 (Australian Antarctic Discordance, AAD) suggested that there was no discernible coincidence between the interpreted age of rocks recovered and the intensity of alteration observed. Samples from the oldest sites occupied appeared to exhibit the least overall effects of alteration, and the intensity of alteration varied from site to site. Previous investigations of low-temperature alteration in oceanic basement samples have been restricted by the myopic perspective provided by single drill holes or dredge collections. Combining core samples from Leg 187 and dredge samples from the AAD collection at Oregon State University (USA) offers the unique opportunity to investigate mineral and bulk chemical changes attending alteration of basalt over a range of ages from 0 to 28 Ma. Results of this research indicate that there is a general increase in the intensity of alteration as the basalts age and mosve off axis, but that this relationship is somewhat veiled by the dominating control on alteration intensity dictated by variations in permeability.

Identification of tsunami-induced deposits using numerical modeling and rock magnetism techniques: Astudy case of the 1755 Lisbon tsunami in Algarve, Portugal (vol 182, pg 187, 2010)

Storm- and tsunami-deposits are generated by similar depositional mechanisms making their discrimination hard to establish using classic sedimentologic methods. Here we propose an original approach to identify tsunami-induced deposits by combining numerical simulation and rock magnetism. To test our method, we investigate the tsunami deposit of the Boca do Rio estuary generated by the 1755 earthquake in Lisbon which is well described in the literature. We first test the 1755 tsunami scenario using a numerical inundation model to provide physical parameters for the tsunami wave. Then we use concentration (MS. SIRM) and grain size (chi(ARM), ARM, B1/2, ARM/SIRM) sensitive magnetic proxies coupled with SEM microscopy to unravel the magnetic mineralogy of the tsunami-induced deposit and its associated depositional mechanisms. In order to study the connection between the tsunami deposit and the different sedimentologic units present in the estuary, magnetic data were processed by multivariate statistical analyses. Our numerical simulation show a large inundation of the estuary with flow depths varying from 0.5 to 6 m and run up of similar to 7 m. Magnetic data show a dominance of paramagnetic minerals (quartz) mixed with lesser amount of ferromagnetic minerals, namely titanomagnetite and titanohematite both of a detrital origin and reworked from the underlying units. Multivariate statistical analyses indicate a better connection between the tsunami-induced deposit and a mixture of Units C and D. All these results point to a scenario where the energy released by the tsunami wave was strong enough to overtop and erode important amount of sand from the littoral dune and mixed it with reworked materials from underlying layers at least 1 m in depth. The method tested here represents an original and promising tool to identify tsunami-induced deposits in similar embayed beach environments.

Glossary of Terms (PDF 187 KB)

Strategic Resources Framework

Annual Report to the Equality Commission 04-05 (PDF 187 KB)

The Department’s Evaluation and Equality Unit provides advice and guidance to colleagues throughout the Department who are planning and undertaking reviews and evaluations of programmes, services and policies, and provides guidance and information to support the policy-making processes. In carrying out this function the Unit has continued to help colleagues to mainstream equality considerations into decision-making, reviews and evaluations from the earliest stages of these processes. åÊ

An Oral Health Strategy for NI - Questionnaire (PDF 187 KB)

A Consultation Document September 2004

Papyrus Prisse. Egyptien 187. Enseignement de Ptahhotep (75-123)

Vers 75 à 123.Maximes 4 à 6 et début de la 7e.

Friday Facts, October 4, 2013, Vol. 187

Bureau of Nutrition and Health Promotion part of the Iowa Department of Public Health produces of weekly newsletter about the Iowa WIC Program for the State of Iowa citizen.

Français 187

Contient : 1° « Li Expositions de les Evangile de tout l'anz » [de MAURICE DE SULLY] ; 2° « Lucydaires de grant sapientie » ; 3° « La Passion de Nostre Signor Jesu Crist », d'après l'Évangile de Nicodème ; 4° « La Destrution de Ieruzalem par la mort de Christ » ; 5° La Légende de Barlaam et de Josaphat ; 6° Les «.VIII. Beneürtez », et les «.VII. Eschelez de l'escale par quoi l'on doit monter en paradiz » (fol. 116)