OBSERVATION OF SECTIONS OF OCEANIC-CRUST AND MANTLE CROPPING OUT ON THE SOUTHERN WALL OF KANE FZ (N-ATLANTIC)

被引:40
作者
AUZENDE, JM
CANNAT, M
GENTE, P
HENRIET, JP
JUTEAU, T
KARSON, J
LAGABRIELLE, Y
MEVEL, C
TIVEY, M
机构
[1] Plouzané
[2] Laboratoire de Pétrologie, Paris, 75257, place Jussieu
[3] Ubo, Brest, 29287, 6, Avenue he Gorgeu
[4] Department of Geology, Duke University, Durham, North Carolina
[5] WHOI, Woods Hole, Massachusetts
关键词
D O I
10.1111/j.1365-3121.1994.tb00647.x
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
The objective of the 20 Nautile dives of the recent Kanaut cruise was to study the southern wall of the Kane Fracture Zone from its eastern intersection with the Mid-Atlantic Ridge (MAR) to 5 Myr in age. The geological mapping shows four successive massifs, wrench faulted and slightly tilted. The transform-facing walls of these massifs exhibit outcrops of fresh and serpentinized peridotites, gabbros and basalts. The entire crustal exposure is cataclased and metamorphosed to greenschist facies.
引用
收藏
页码:143 / 148
页数:6
相关论文
共 34 条
[11]  
Francheteau J., Armigo R., Cheminee J.L., Hekinian R., Blum N., 1 MA East Pacific Rise oceanic crust and uppermost mantle exposed by rifting in Hess Deep (equatorial Pacific Ocean), Earth Planet. Sci. Lett., 101, pp. 281-295, (1990)
[12]  
Francis T.G., Serpentinization faults and their role in the tectonics of slow‐spreading ridges, J. geophys. Res., 86, pp. 11-11, (1981)
[13]  
Gente P., Etude morphostructurale comparative de dorsales océaroques à taux d'expansion variés, (1987)
[14]  
Gente P., Mevel C., Auzende J.-M., Karson J.A., Fouquet Y., An example of a recent accretion on the Mid‐Atlantic Ridge: the Snake‐Pit neovolcanic ridge (MARK area, 23–22′N), Tectonophysics, 190, pp. 1-29, (1991)
[15]  
Harper G.D., Tectonics of Slow Spreading Mid‐Ocean Ridges and consequences of a variable depth to the brittle/ductile transition, Tectonics, 4, 4, pp. 395-409, (1985)
[16]  
Hekinian R., Bideau P., Cannat M., Francheteau J., Hebart R., Volcanic activity and crust‐mantle exposure in the ultra‐fast Garrett transform fault, Earth Planet. Sci. Lett.
[17]  
Karson J.A., Dick H.J.B., Tectonics of ridge‐transform intersections at the Kane fracture zone, Mar. Geophys. Res., 6, pp. 51-98, (1983)
[18]  
Karson J.A., Thompson G., Humphris S.E., Edmond J.M., Bryan W.B., Brown J.R., Winters A.T., Pockalny R.A., Casey J.F., Campbell A.C., Klinkhammer G., Palmer M.R., Kinzler R.J., Sulanowska M.M., Along‐axis variations in seafloor spreading in the MARK area, Nature, 328, pp. 681-685, (1987)
[19]  
Karson J.A., Delaney J.R., Spiess F.N., Hurst S., Lawhead B., Naidoo D.D., Gente P., Deep‐Tow operations at the Eastern intersection of the Mid‐Atlantic‐Ridge and the Kane fracture zone, EOS, Trans. Am. Geophys. Un., 73, (1992)
[20]  
Kong L.S., Detrick R.S., Fox P.J., Mayer L.A., Ryan W.B.F., The morphology and tectonics of the MARK area from Sea‐Beam and Sea MARC I observations (Mid‐Atlantic Ridge 23(N), Mar. Geophys. Res., 10, pp. 59-90, (1988)