Lake Kivu expedition : geophysics, hydrography, sedimentology (preliminary report)
Degens, Egon T.
Deuser, Werner G.
von Herzen, Richard P.
Wooding, Frank B.
Jannasch, Holger W.
Kanwisher, John W.
MetadataShow full item record
In March 1971, seven members of the Woods Hole Oceanographic Institution were engaged in a multidisciplinary study of Lake Kivu. This expedition represents part of a long-range program concerned with the structural and hydrographical settings of the East African Rift Lakes and their relationships to the Red Sea and the Gulf of Aden Rifts. The program started in May 1963 with a geophysical study on Lake Malawi (von Herzen and Vacquier, 1967). Several expeditions of our Institution into the Red Sea and Gulf of Aden area in 1964, 1965 and 1966 (Degens and Ross, 1969) provided detailed geological information on the "northern" extension of the East African Rift. And finally our study of last year on Lake Tanganyika c1osed a major gap in the program; it allowed us to out1ine a model on the evolution of a rift which starts with (i) bulging of the earth's crust, (ii) block-faulting, (iii) volcanism and hydrothermal activity, and which has its final stage in (iv) sea floor spreading (Degens et al. 1971). In the case of Lake Tanganyika, only the second stage of this evolution series has been reached, i.e. block-faulting. In contrast, the Red Sea and the Gulf of Aden had already evolved to active sea floor spreading, almost 25 million years ago. Somewhere along the line between Lake Tanganyika and the Gulf of Aden must lie the "missing link" of this evolution series. Lake Kivu, almost 100 miles to the north of Lake Tanganyika is situated at the highest point of the Rift Valley and is surrounded by active volcanoes and geothermal springs. As recently as 1944, lava flows reached the lake shore. This lake was therefore, a natural choice to test our hypothesis on the origin and development of rifts. Furthermore, the occurrence of large quantities of dissolved gases, e.g., CO2 and methane, represented an interesting geochemical phenomenon worthwhile to investigate.
Showing items related by title, author, creator and subject.
Comiso, Josefino C.; Yang, Jiayan; Honjo, Susumu; Krishfield, Richard A. (American Geophysical Union, 2003-12-24)The decade of the 1990s was the warmest decade of the last century, while the year 1998 was the warmest year ever observed by modern techniques, with 9 out of 12 months of the year being the warmest months. Satellite ice ...
Andres, Magdalena; Kwon, Young-Oh; Yang, Jiayan (American Geophysical Union, 2011-04-15)Observations show that the Kuroshio in the East China Sea (ECS-Kuroshio) responds to the large-scale wind stress curl field at two time scales. It is argued that these two responses are related to barotropic and baroclinic ...
A compilation and description of hydrographic transects of the Mid-Atlantic Bight shelf-break front Lyne, Vincent D.; Csanady, Gabriel T. (Woods Hole Oceanographic Institution, 1984-04)Historical hydrographic transects of the Mid-Atlantic Bight shelf-break front are compiled by month and described in this report. Interannual variability of the meteorological forcing and slope water mass properties are ...