Chemical composition and K-Ar age of rocks from the northern Sea of Japan

The Middle Paleozoic complex consists of terrigenous and volcanogenic materials metamorphized in greenschist facies. Clastic rocks have arkosic composition and are formed by alteration of basalts and metamorphic rocks. Metaeffusives were formed from basaltoid products of oceanic tholeiite magma indicating that underwater rise structures of the northern Sea of Japan were emplaced on the oceanic crust.

Petrology, geochemistry and K-Ar Age determination of De Gerlache Seamount basalts

The De Gerlache Seamounts are two topographic highs in the Bellingshausen Sea, southeastern Pacific. Petrological and geochemical studies together with K-Ar age determinations were carried out on four dredged basalt samples collected during a RV Polarstern expedition (ANT-XII/4) in 1995. Minor and trace element composition suggest alkaline basalt compositions. Compared to alkaline basalts of adjacent West Antarctica (the Jones Mountains) and of Peter I Island, the samples have lower mg-numbers, lower Ni and Cr contents and lower high field-strength elements (HFSE)/Nb and large-ion lithophile elements (LILE)/HFSE ratios. Three of the four samples have low K, Rb, and Cs concentrations relative to alkaline basalts. The K-depletion and other elemental concentrations may be explained by 1.1% melting of amphibole bearing mantle material. Additionally, low Rb and Ba values suggest low concentrations of these elements in the mantle source. K-Ar age determinations yield Miocene ages (20-23 Ma) that are similar in age to other alkaline basalts of West Antarctica (Thurston Island, the Jones Mountains, Antarctic Peninsula) and the suggested timing of onset of Peter I Island volcanism (~10-20 Ma). The occurrence of the DGS and Peter I Island volcanism along an older but reactivated tectonic lineation suggests that the extrusions exploited a zone of pre-existing lithospheric weakness. The alkaline nature and age of the DGS basalts support the assumption of plume activity in the Bellingshausen Sea.

(Table 1) K-Ar age and inert-gas-isotopes at DSDP Holes 68-501, 69-504B and 69-505B

Conventional K-Ar ages have been determined and inert-gas abundances have been measured on representative samples of altered rocks from Deep Sea Drilling Project Holes 501, 504B, and 505B in an attempt to correlate their degree of alteration with inert-gas and K-Ar data. Samples taken from the first 60 meters below the sediment/basalt interface give significantly higher ages than would be expected from the magnetic stratigraphy, though at greater depths the calculated ages are in broad agreement with the expected age. The inert gas ratios 20Ne/36Ar, 36Ar/84Kr, and 84Kr/130Xe also show a marked discontinuity at the 60-meter depth, and all these effects are interpreted as being a consequence of low-temperature alteration produced by burial metamorphism and by interaction with sea water (halmyrolysis).

St.Francis Basin project (MO,AR) : environmental impact statement.

F available only in microfiche

Kitāb Nuzhat dhawī al-kays wa-tuḥfat al-udabāʼ fī qaṣāʼid Imruʼ al-Qays ashʻar al-shuʻarāʼ.

Added t.p.: Le diwan d'Amroʼlkaïs,prʹecʹdʹe de la vie de ce poète par l'auteur du Kitab el-aghani accompagnʹe d'une traduction et de notes par Le Bon. Mac Guckin de Slane.

Ascamot; or, Laws and regulations of the Congregation of Spanish and Portuguese Jews, entitled [Shaʻar ha-shamayim (romanized form)]

Mode of access: Internet.

Sefer Shaʻar ha-yiḥudim ; ṿe-Sefer Tsadiḳ yesod ʻolam : mayim ḳedoshim mi-peleg Eloḳim /

Reprint, with new introduction. Originally published: Lemberg : Leib Rappaport, 1855.

Shem ʻolam : ṿe-hu ha-sefer ʻal peṭirat ha-śar ha-tsadiḳ Sir Mosheh Monṭifyori = Schem Olem /

Mode of access: Internet.

Lo dubim ṿe-lo yaʻar o, Mishpat tsedeḳ : le-hotsi et tsidḳat ... Eliʻezer Tsṿaifel mi-divre H. Shatsḳes.

Mode of access: Internet.

Sefer Arʻa de-rabanan : kolel ke-shivʻah meot kelalim gufe Torah be-seder u-maʻarekhet a.b., yitḥaḳeh ʻal shorshe kol halakhah /

Includes bibliographical references.

Maʻaśeh merkavah : asher ḥazah Yeḥezḳʼel : mevoʼar be-ruaḥ ha-biḳoret ha-ḥadashah bi-shene sefarim /

Includes bibliographical references.

Deoraiḋeaċt : uirsgéal ar an aimsir seo atá i láṫiar /

Mode of access: Internet.

"Ail-ddechreu", drama fer ar ddirwest (Mewn un olygfa)

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Cartilla para enseñar aler a los niños. Con la doctrina Christiana que se canta, Amados hermanos.

"No other copy of this book is known"--Huntington, Reprints, p. 21.

Aircraft accident report : Delta Ar Lines, inc., McDonnell Douglas DC-9-32, N3323L, Chattanooga Municipal Airport, Chattanooga, Tennessee, November 27, 1973 /

Mode of access: Internet.