全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

Interpreta??es paleoambientais obtidas a partir das varia??es na colora??o das carapa?as de foraminíferos, da Enseada do Flamengo, SP

DOI: 10.1590/S0373-55241994000100005

Keywords: foraminifers, carapaces impregnated with limonite, carapaces filled with pyrite, potencial redox, cores, holocene, reducing environment, enseada do flamengo: sp, brasil.

Full-Text   Cite this paper   Add to My Lib

Abstract:

two cores obtained respectively from saco da ribeira and saco do perequê-mirim, both located within flamengo bay, northern coast of s?o paulo, brazil, have been studied. at former site many pyrite- filled foraminifera carapaces were observed. at the other site, there occur carapaces filled with pyrite, as well as carapaces impregnated with limonite and iron monosulfide, the latter showing a close relationship between limonite and iron monosulfide impregnated carapaces with strongly bioturbated levels. these observations reveal more reducing conditions in the saco da ribeira than in the saco do perequê-mirim. by quantifying the number of carapaces impregnated with hydroxide/oxide vs. those filled by ferrous sulfide, it was possible to estimate some differences in redox potenciais at these two sites.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133