BATHYMETRIC RECONSTRUCTIONS OF THE MIOCENE-AGE CALCARI A LUCINA (NORTHERN APENNINES, ITALY) FROM OXYGEN ISOTOPES AND BENTHIC FORAMINIFERA

被引:24
作者
AHARON, P
SENGUPTA, BK
机构
[1] Department of Geology and Geophysics, Louisiana State University, Baton Rouge, 70803, Louisiana
关键词
D O I
10.1007/BF01203734
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Two independent methods of paleobathymetry, applicable to hydrocarbon-derived carbonates, are explored in this study. The oxygen isotope method exploits the temperature decline with depth that leaves a measurable imprint on the delta(18)O composition of pristine products of venting comprised of aragonites and dolomites. The other method makes use of the bathymetric preferences of benthic foraminiferal taxa entrapped in the carbonate buildups. These two methods were tested on the ''calcari a Lucina'' limestones hosted in turbidites and mudstones infilling the Miocene-age Marnoso-arenacea basin. The limestone blocks, rich in fossils of chemosymbiotic-like fauna, preserve a 10-Ma record of hydrocarbon venting from Langhian to lower Messinian times. Our results indicate that carbonate accretion and lithification occurred at upper bathyal depths in waters not shallower than 200-250 m. The delta(18)O of venting products contains the imprints of profound hydrographic changes that occurred in the ancient Mediterranean basin from the lower Serravallian to the lower Messinian.
引用
收藏
页码:219 / 230
页数:12
相关论文
共 55 条
[41]  
REID RGB, 1986, VELIGER, V29, P3
[42]  
Ricci Lucchi F., 1978, GEOL MIJNB, V57, P559
[43]  
Ricci Lucchi F., 1986, SPEC PUBLICAT INT AS, V8, P105
[44]  
Roberts HH, 1993, CARBONATE MICROFABRI, DOI DOI 10.1007/978-1-4684-9421-1_7
[45]   BENTHIC FORAMINIFERA OF BATHYAL HYDROCARBON VENTS OF THE GULF-OF-MEXICO - INITIAL REPORT ON COMMUNITIES AND STABLE ISOTOPES [J].
SENGUPTA, BK ;
AHARON, P .
GEO-MARINE LETTERS, 1994, 14 (2-3) :88-96
[46]   THE CALCARI-A-LUCINA MACROFAUNA RECONSIDERED - DEEP-SEA FAUNAL EASES FROM MIOCENE-AGE COLD VENTS IN THE ROMAGNA APENNINE, ITALY [J].
TAVIANI, M .
GEO-MARINE LETTERS, 1994, 14 (2-3) :185-191
[47]   PETROGRAPHY AND STABLE-ISOTOPE ASPECTS OF COLD VENT ACTIVITY IMPRINTED ON MIOCENE AGE CALCARI-A-LUCINA FROM TUSCAN AND ROMAGNA APENNINES, ITALY [J].
TERZI, C ;
AHARON, P ;
LUCCHI, FR ;
VAI, GB .
GEO-MARINE LETTERS, 1994, 14 (2-3) :177-184
[48]   ATLANTIC-MEDITERRANEAN WATER EXCHANGE DURING THE LATE NEOGENE [J].
Thunell, Robert C. ;
Williams, Douglas F. ;
Howell, Michael .
PALEOCEANOGRAPHY, 1987, 2 (06) :661-678
[49]  
TURNER RD, 1985, AM MALACOLOGICAL B, V1, P23
[50]  
Van der Zwaan G.J., 1982, UTRECHT MICROPALEONT, V25, P1