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Titolo:
CONTROLS ON MODERN CARBONATE SEDIMENTATION ON WARM-TEMPERATURE TO ARCTIC COASTS, SHELVES AND SEAMOUNTS IN THE NORTHERN-HEMISPHERE - IMPLICATIONS FOR FOSSIL COUNTERPARTS
Autore:
HENRICH R; FREIWALD A; BETZLER C; BADER B; SCHAFER P; SAMTLEBEN C; BRACHERT TC; WEHRMANN A; ZANKL H; KUHLMANN DHH;
Indirizzi:
UNIV BREMEN,FACHBEREICH GEOWISSENSCH,POSTFACH 330440 D-28334 BREMEN GERMANY INST GEOL PALAONTOL D-60054 FRANKFURT GERMANY UNIV MAINZ,INST GEOWISSENSCH D-55099 MAINZ GERMANY UNIV MARBURG,INST GEOL & PALAONTOL D-35032 MARBURG GERMANY CHRISTIAN ALBRECHTS UNIV KIEL,INST GEOL PALAONTOL D-24118 KIEL GERMANY ECOSTN D-17321 SCHMAGEROW GERMANY
Titolo Testata:
Facies
, volume: 32, anno: 1995,
pagine: 71 - 108
SICI:
0172-9179(1995)32:<71:COMCSO>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
CORAL LOPHELIA-PERTUSA; NORTHWESTERN VANCOUVER-ISLAND; OF-THORNS STARFISH; CONTINENTAL-SHELF; NEW-ZEALAND; COOL-WATER; SOUTHERN AUSTRALIA; ROCKALL BANK; SOUTHEASTERN AUSTRALIA; CALCAREOUS SEDIMENTS;
Keywords:
NONTROPICAL CARBONATES; ENVIRONMENTAL CONTROL; SEASONALITY; OCEANOGRAPHY; FORAMOL; BRYOMOL; CORALLINE ALGAE; MAERL; BALANIDS; BRYOZOA; LOPHELIA REEFS; CLADOCORA BANKS; KELP FORESTS; RECENT;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
193
Recensione:
Indirizzi per estratti:
Citazione:
R. Henrich et al., "CONTROLS ON MODERN CARBONATE SEDIMENTATION ON WARM-TEMPERATURE TO ARCTIC COASTS, SHELVES AND SEAMOUNTS IN THE NORTHERN-HEMISPHERE - IMPLICATIONS FOR FOSSIL COUNTERPARTS", Facies, 32, 1995, pp. 71-108

Abstract

In contrast to the well studied tropical carbonate environments, interest in non-tropical carbonate deposition was rather low until the basic ideas of the FORAMOL-concept were outlined by LEES & BULLER (1972). In the following two decades studies on non-tropical carbonate settings evolved as a new and exciting branch of carbonate sedimentology (see NELSON 1988). This is archieved in a great number of publications dealing on temperate carbonate deposits from numerous coastal and open shelf settings on both hemispheres. The existence of wide extended carbonate depositional systems and even reefal frameworks in Subarctic andArctic seas which are in focus by our research group made it possibleto study modem non-tropical carbonate settings along a latitudinal transect from the warm-temperate Mediterranean Sea to the cold Nordic Seas. Because of increasing seasonality in environmental conditions towards high latitudes, the major controls in biogenic carbonate production can be more clearly addressed in these areas. After the initiation of the priority program ''Global and regional controlling processes of biogenic sedimentation - evolution of reefs'' by the German Science Foundation four years ago, a set of modern case studies were comparatively analysed specifically with regard to their principle controlling processes: (1) Modern and Holocene coralline algal reefs and rhodolith pavements formed in wave-protected shallow waters along the coast of the Brittany and northern Norway. Their fine-tuned interaction with herbivores resulted in the development of widespread but low-diverse, slowly growing coralline algal frameworks: with high competitive value against the rapid-growing phaeophytic communities. (2) The Mediterranean Cladocora caespitosa-banks provide an instructive example of non-tropical hermatypic coral framework construction out of the subtropical-tropical coral reef belt. (3) The geometry and environmental controls of several kilometer long coral reefs formed by the azooxanthellate Lophelia pertusa and Madrepora oculata are studied in more than 250 m waterdepth in mid and northern Norway. (4) Modern BRYOMOL-sediments are widely distributed on non-tropical deeper shelf settings. The formational processes converting bryozoan-thickets into huge piles of sand and gravel dunes are recently studied on the outer shelves off northern Brittany and off northern Norway. (5) Arctic sponge-bryozoan buildups on the seamount Vesterisbank in the Greenland Sea and (6) balanid-dominated open shelf carbonates on the Spitsbergen Bank form the Arctic endmembers of modern FORAMOL-deposits. Seasonal ice-edge phytoplankton blooms and efficient mechanisms of pelagic-benthic food transfer characterize these depositional settings. Fossil counterparts of each of these modern case studies are discussed in context with their paleoceanographic and environmental settings.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 21/09/20 alle ore 00:59:32