HYDROCARBON-DERIVED IMPRINTS IN OLISTOSTROMES OF THE EARLY SERRAVALLIAN MARNOSO-ARENACEA FORMATION, ROMAGNA APENNINES (NORTHERN ITALY)

被引:20
作者
BERTI, M
CUZZANI, MG
LANDUZZI, A
TAVIANI, M
AHARON, P
VAI, GB
机构
[1] UNIV BOLOGNA,FAC INGN,IST TOPOG,I-40136 BOLOGNA,ITALY
[2] CNR,IST GEOL MARINA,I-40129 BOLOGNA,ITALY
[3] LOUISIANA STATE UNIV,DEPT GEOL & GEOPHYS,BATON ROUGE,LA 70803
关键词
D O I
10.1007/BF01203731
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Evidence of hydrocarbon venting within slumped bodies associated with the siliciclastic, dominantly turbiditic, Marnoso-arenacea Formation (Umbria-Romagna structural domain, Romagna Apennine, northern Italy) is documented with sedimentological, faunal, and geochemical data. Specifically, C-13-depleted carbonate concretions and limestones and clusters of chemosynthetic clams (Vesicomyidae) have been identified in the marls of the Le Caselle Olistostrome and other slumped bodies contained within the Early Serravallian section of the Marnoso-arenacea Fm. Most of the olistostrome marls and limestones are extrabasinal and must have slid from a source area located several kilometers southwest of their present position. Thus, they presumably pertain to the Vicchio Marls Formation of the northeastern (outer) Tuscan structural domain, with possible minor contributions from the epi-ligurian Bismantova Fm. It is suggested that venting of methane in the source area of the olistostromes permitted the establishment of exotic chemosynthetic communities and promoted the precipitation of carbonate concretions and limestones. According to the field evidence, these materials were later subjected to multistep downslope remobilization and were eventually carried into the Marnoso-arenacea basin through gravity mass transport.
引用
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页码:192 / 200
页数:9
相关论文
共 34 条
[1]  
AHARON P, 1992, GEOLOGY, V20, P483, DOI 10.1130/0091-7613(1992)020<0483:SVOBIT>2.3.CO
[2]  
2
[3]  
AHARON P, 1993, 14TH IAS REG M SED M
[4]  
BEAUCHAMP B, 1992, PALAIOS, V7, P4
[5]  
BOSS KJ, 1980, MALACOLOGIA, V20, P161
[6]   GEOCHEMICAL AND BIOGEOCHEMICAL OBSERVATIONS ON THE BIOLOGICAL COMMUNITIES ASSOCIATED WITH FLUID VENTING IN NANKAI TROUGH AND JAPAN TRENCH SUBDUCTION ZONES [J].
BOULEGUE, J ;
BENEDETTI, EL ;
DRON, D ;
MARIOTTI, A ;
LETOLLE, R .
EARTH AND PLANETARY SCIENCE LETTERS, 1987, 83 (1-4) :343-355
[7]  
CAPOZZI R, 1992, PROFILO CROP 3, P261
[8]   FRACTIONATION OF CARBON AND HYDROGEN ISOTOPES BY METHANE-OXIDIZING BACTERIA [J].
COLEMAN, DD ;
RISATTI, JB ;
SCHOELL, M .
GEOCHIMICA ET COSMOCHIMICA ACTA, 1981, 45 (07) :1033-1037
[9]  
CUZZANI MG, 1992, THESIS U BOLOGNA
[10]   ADAPTATIVE FEATURES OF THE BIVALVE MOLLUSKS ASSOCIATED WITH FLUID VENTING IN THE SUBDUCTION ZONES OFF JAPAN [J].
FIALAMEDIONI, A ;
LEPENNEC, M .
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY, 1989, 71 (1-2) :161-167