Microfossils and chemical elements in bottom sediments of the Ashadze-1 Hydrothermal Field (tropical Mid-Atlantic Ridge)

Autoria(s): Gablina, IF; Demina, Lyudmila L; Dmitrenko, Olga B; Os'kina, Natalia S; Popova, EA; Khusid, Tatyana A; Shilov, VV
Cobertura

MEDIAN LATITUDE: 12.972990 * MEDIAN LONGITUDE: -16.697574 * SOUTH-BOUND LATITUDE: 12.972150 * WEST-BOUND LONGITUDE: -44.863033 * NORTH-BOUND LATITUDE: 12.974367 * EAST-BOUND LONGITUDE: 44.862833
Data(s)

27/06/2011
Resumo

The first thorough analysis of microfossils from ore-bearing sediments of the Ashadze-1 Hydrothermal Field in the Mid-Atlantic Ridge sampled during Cruise 26 of R/V Professor Logachev in 2005 revealed substantial influence of hydrothermal processes on preservation of planktonic calcareous organisms as well as on preservation and composition of benthic foraminifera. From lateral and vertical distribution patterns and secondary alterations of microfossils it is inferred that the main phase of hydrothermal mineralization occurred in Holocene. Heavy metals (Cu, Co, Cr, and Ag) were accumulated by foraminiferal tests and in their enveloping Fe-Mn crusts. Distribution of authigenic minerals replacing foraminiferal tests demonstrates local zoning related to hydrothermal activity. There are three mineral-geochemical zones defined: sulfide zone, zone with elevated Mg content, and zone of Fe-Mn crusts.
Formato

application/zip, 4 datasets
Identificador

https://doi.pangaea.de/10.1594/PANGAEA.785138

doi:10.1594/PANGAEA.785138
Idioma(s)

en
Publicador

PANGAEA
Direitos

CC-BY: Creative Commons Attribution 3.0 Unported

Access constraints: unrestricted
Fonte

Supplement to: Gablina, IF; Demina, Lyudmila L; Dmitrenko, Olga B; Os'kina, Natalia S; Popova, EA; Khusid, Tatyana A; Shilov, VV (2011): Composition and secondary alterations of microfossils in sediments of the Ashadze-1 Hydrothermal Field (tropical Mid-Atlantic Ridge). Translated from Okeanologiya, 2011, 51(3), 505-520, Oceanology, 51(3), 476-490, doi:10.1134/S0001437011030052
Palavras-Chave #A. exiguus; A. weddellensis; Ag; Al2O3; Alabaminella weddellensis; Alabaminoides exiguus; Aluminium oxide; and Pullenia bulloides; and Quinqueloculina seminulum; Antimony; Archive of Ocean Data; ARCOD; Arsenic; As; Ashadze-1 Hydrothermal Field, Mid-Atlantic Ridge; Ashadze hydrothermal field; Atomic absorption spectrometry (AAS); Ba; Barium; BC; Box corer; C. nitida; Ca; Cadmium; Calcium; Calcium oxide; Calculated; Candeina nitida; CaO; Carbon, organic, total; Carbon analyser AN-7529, 7560; Carbon dioxide; Cd; Chromium; Co; CO2; Cobalt; Copper; Counting; Counting, foraminifera, benthic; Counting, foraminifera, planktic; Cr; Cu; Depth; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Depth bot; Depth top; Dredge; DRG; Element analysis, neutron activation (NAA); Event; F. wuellerstorfi; Fe; Fe/Mn; Fe2O3; Fissurina spp.; Fontbotia wuellerstorfi; Foram bent; Foram bent sp; Foraminifera, benthic; Foraminifera, benthic, number of species; Fraction; G. aequilateralis; G. anfracta; G. bulloides; G. calida; G. conglobatus; G. crassaformis; G. digitata; G. dutertrei; G. falconensis; G. glutinata; G. humilis; G. inflata; G. iota; G. menardii; G. menardii flexuosa; G. orbicularis; G. pumilio; G. quinqueloba; G. ruber; G. rubescens; G. sacculifer; G. scitula; G. subglobosa; G. tenellus; G. truncatulinoides; G. tumida; Globigerina bulloides; Globigerina calida; Globigerina digitata; Globigerina falconensis; Globigerina quinqueloba; Globigerina rubescens; Globigerinella aequilateralis; Globigerinita glutinata; Globigerinita humilis; Globigerinita iota; Globigerinoides conglobatus; Globigerinoides ruber; Globigerinoides sacculifer; Globigerinoides tenellus; Globocassidulina subglobosa; Globoquadrina dutertrei; Globorotalia anfracta; Globorotalia crassaformis; Globorotalia inflata; Globorotalia menardii; Globorotalia menardii flexuosa; Globorotalia pumilio; Globorotalia scitula; Globorotalia truncatulinoides; Globorotalia tumida; Gyroidina orbicularis; H. pelagica; Hastigerina pelagica; Hg; Iron; Iron/manganese ratio; Iron oxide, Fe2O3; Label; Lead; Magnesium oxide; Manganese; Manganese oxide; Mercury; MgO; Mn; MnO; N. pachyderma d; N. umbonifera; Neogloboquadrina pachyderma dextral; Ni; Nickel; Nuttallides umbonifera; O. tener; O. universa; Orbulina universa; Oridorsalis tener; Ostrac; Ostracoda per unit mass; P. murrhina; P. obliquiloculata; P. subcarinata; Pb; PL26; PL26-1437; PL26-1475; PL26-1508; PL26-1518; PL26-1519; PL26-1520; PL26-1521; PL26-1528; PL26-1529; Professor Logachev; Pullenia subcarinata; Pulleniatina obliquiloculata; Pyrgo murrhina; Q. venusta; Quinqueloculina venusta; S; S. dehiscens; Sample code/label; Sample type; Samp type; Sb; Se; Selenium; Silicon dioxide; Silver; SiO2; Size fraction; Sp count; Specimen count; Sphaeroidinella dehiscens; Sr; Strontium; Sulphur, total; Sum; Television-Grab; TOC; TVG; VC; Vibro Corer; Wet chemistry; Zinc; Zn
Tipo

Dataset
Acesso ao item digital