Geochemistry and isotopic ratios of basalts from ODP Leg 163 sites

Voluminous, subaerial magmatism resulted in the formation of extensive seaward-dipping reflector sequences (SDRS) along the Paleogene Southeast Greenland rifted margin. Drilling during Leg 163 recovered basalts from the SDRS at 66ºN (Site 988) and 63ºN (Sites 989 and 990). The basalt from Site 988 is light rare-earth-element (REE) enriched (La(n)/Yb(n) = 3.4), with epsilon-Nd(t=60) = 5.3, 87Sr/86Sr = 0.7034, and 206Pb/204Pb = 17.98. It is similar to tholeiites recovered from the Irminger Basin during Leg 49 and to light-REE-enriched tholeiites from Iceland. Drilling at Site 989, the innermost of the sites on the 63ºN transect, was proposed to extend recovery of the earliest part of the SDRS initiated during Leg 152. These basalts are, however, younger than those from Site 917 and are compositionally similar to basalts from the more seaward Sites 990 and 915. Many of the basalts from Sites 989 and 990 show evidence of contamination by continental crust (e.g., epsilon-Nd(t=60) extends down to -3.7, 206Pb/204Pb extends down to 15.1). We suggest that the contaminant is a mixture of Archean granulite and amphibolite and that the most contaminated basalts have assimilated ~5% of crust. Uncontaminated basalts are isotopically similar to basalts from Site 918, on the main body of the SDRS, and are light-REE depleted. Consistent with previous models of the development of this margin, we show that at the time of formation of the basalts from Sites 989 and 990 (1) melting was at relatively shallow levels in a fully-fledged rift zone; (2) fragments of continental crust were present in the lithosphere above the zones of melt generation; and (3) the sublithospheric mantle was dominated by a depleted Icelandic plume component.

(Table 1) Clay minerals at DSDP Hole 93-603B

Cretaceous sediments encountered in Hole 603B contain a 17 Å smectite as the principal clay mineral, with lesser amounts of illite, kaolinite, and randomly interstratified illite/smectite (I/S). No evidence of smectite to I/S transformation with depth is seen in the interval between 1040 and 1570 m below the sediment surface. Although the presence of some volcanic ash suggests a volcanic origin for the smectite, the nature of associated organic matter together with prevailing sedimentological models for Cretaceous sedimentation on the lower continental rise argue more strongly for a dominantly terrestrial origin for the clays.

Rukovodstvo po istorii Russkoi T S erkvi /

I. Domongol skii period (988-1237) -- II. Period severno-russkoi mitropolii (1237-1588) -- III. Patriarshii period (1589-1700) -- IV. Sinodal nyi period (1700-1890).

Memoria descriptiva de la villa de la Malaha, su baño y salina; historia natural y general de la misma; análisis de sus aguas minerales; enfermedades y epocas en que podrá ser conveniente su uso /

Esta memoria corresponde con ligeras variantes al no 988 de la Sección impresos.

Acutissimi ... M. Iacobi Almain ... Moralia, que vocant, cum iprius authoris [et] Dauid Cranston additionibus ...

Mode of access: Internet.

Burcardi Gotth. Struvii Introductio in notitiam rei litterariae et usum bibliothecarium ..

Contiene: Introductionis in notitiam rei litterariae pars II, p. [3], 474-988, [68]

Bach Institute Library holdings : J.S. Bach editions brought to press or prepared for publication during the composer's lifetime /

In container.

Monthly catalog of United States Government publications /

One issue per year, 1977 (no. 988)-1984 (no. 1074), 2001 (no. 1294)- has title: Serials supplement; one issue per year, 1985-1991, has title: Periodicals supplement; one issue each year, 1992-2000, has title: Periodicals supplement for ... (varies slightly)

Storia Universale /

Contiene : Vol.1(556 p.)- Vol.2(784 p.)- Vol.3(988 p.)- Vol.4(877 p.).- Vol.6(1036 p.)- Vol.7(614 p.)- Vol.9(1092 p.)- Vol.10(800 p.)- Vol.11(690 p.)- Vol.12(854 p.)