PLATFORM MARGIN COLLAPSES AND SEQUENCE STRATIGRAPHIC ORGANIZATION OF CARBONATE SLOPES - CRETACEOUS-EOCENE, GARGANO PROMONTORY, SOUTHERN ITALY

被引：82

作者：

BOSELLINI, A

NERI, C

LUCIANI, V

机构：

[1] Dipartimento di Scienze Geologche e Paleontologiche, Università di Ferrara, Ferrara

来源：

TERRA NOVA | 1993年 / 5卷 / 03期

关键词：

D O I：

10.1111/j.1365-3121.1993.tb00259.x

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

We describe the sequence stratigraphic organization and the associated sedimentological characteristics of Cretaceous to Eocene slope and base-of-slope carbonate successions. The study area is located in the Gargano Promontory which belongs to the stable foreland of southern Italy. The succession consists of three superimposed depositional sequences separated by major unconformities. The upper two sequences are clear examples of sequence stratigraphic organization; in fact, they both start with huge megabreccia wedges (LST) followed upward by thin pelagic units (TST) and a thick package of calciturbidites and debrites that alternate with pelagic mudstone (HST). The Cretaceous highstand systems tract is clearly arranged in a number of coarsening-upward cycles while the Eocene one which also comprises a toplap shallow water unit, is not. The Gargano stratigraphic palimpsest and the entire margin of the Apulia Platform show remarkable similarities with present-day carbonate platform margins and slopes where irregular, convex-bankward embayments suggest large-scale failures. It is clear that classic sequence stratigraphic organization can result from simple platform dismantling, having no or little time relation with global sea-level fluctuations. In fact, as the margin failure (LST) interrupts the carbonate production, a period of starvation (TST) along the entire slope and base-of- slope follows necessarily. Finally, when the margin once again becomes active and productive, sediment exportation starts again and the system begins to prograde (HST).

引用

页码：282 / 297

页数：16

共 56 条

[11]

Channell J.E.T., D'Argenio B., Horvath F., Adria, the African Promontory, in Mesozoic Mediterranean palaeogeography, Earth Sci. Rev., 15, pp. 213-292, (1979)

[12]

Cook H.E., McDaniel P.N., Mountjoi E.W., Pray L.C., Allochthonous carbonate debris flow at Devonian bank (‘reef’) margins, Alberta, Canada, Bull. Canad. Petrol. Geol., 20, pp. 439-497, (1972)

[13]

Cremonini G., Elmi C., Selli R., Foglio 156

[14]

S. Marco in Lamis

[15]

Note Illustrative della Carta Geologica d'Italia, (1971)

[16]

Crescenti U., Stratigraphic position of the bauxites in the central southern Italy, Ann. Inst. Geol. Publ. Hung., 54, pp. 235-239, (1969)

[17]

Crescenti U., Vighi L., Risultati delle ricerche eseguite sulle formazioni bauxitiche cretaciche del Casertano e del Matese, in Campania, Mem. Soc. geol. Ital., 9, pp. 401-434, (1970)

[18]

Crevello P., Schlager R.W., Carbonate debris sheet and turbidites, Exuma Sound, Bahamas, J. sedim. Petrol., 50, pp. 1121-1148, (1980)

[19]

D'Argenio B., Central and southern Italy Cretaceous bauxites: stratigraphy and paleogeography, Ann. Inst. Geol. Publ. Hung., 54, pp. 221-233, (1969)

[20]

D'Argenio B., Mindszenty A., Karst bauxites at regional unconformities and geotectonic correlation in the Cretaceous of the Mediterranean, Boll. Soc. Geol. Ital., 110, pp. 85-92, (1991)

← 1 2 3 4 5 6 →