| 1. Identity statement | ||||
| Reference Type | Journal Article | |||
| Site | mtc-m21c.sid.inpe.br | |||
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S | |||
| Identifier | 8JMKD3MGP3W34R/44NRRFP | |||
| Repository | sid.inpe.br/mtc-m21c/2021/05.24.16.11 (restricted access) | |||
| Last Update | 2021:05.24.16.11.32 (UTC) simone | |||
| Metadata Repository | sid.inpe.br/mtc-m21c/2021/05.24.16.11.32 | |||
| Metadata Last Update | 2022:04.03.22.28.42 (UTC) administrator | |||
| DOI | 10.3389/feart.2021.634482 | |||
| ISSN | 2296-6463 | |||
| Citation Key | JaquetoTFCNSCSK:2021:MaMiSp | |||
| Title | Magnetic Mineralogy of Speleothems From Tropical-Subtropical Sites of South America  | |||
| Year | 2021 | |||
| Month | Apr. | |||
| Access Date | 2024, May 19 | |||
| Type of Work | journal article | |||
| Secondary Type | PRE PI | |||
| Number of Files | 1 | |||
| Size | 4026 KiB | |||
| 2. Context | ||||
| Author | 1 Jaqueto, Plinio 2 Trindade, Ricardo I. F. 3 Feinberg, Joshua M. 4 Carmo, Janine 5 Novello, Valdir F. 6 Strikis, Nicolas M. 7 Cruz, Francisco W. 8 Shimizu, Marília Harumi 9 Karmann, Ivo | |||
| Group | 1 2 3 4 5 6 7 8 DIPTC-CGCT-INPE-MCTI-GOV-BR | |||
| Affiliation | 1 Universidade de São Paulo (USP) 2 Universidade de São Paulo (USP) 3 University of Minnesota 4 Universidade de São Paulo (USP) 5 Universidade de São Paulo (USP) 6 Universidade Federal Fluminense (UFF) 7 Universidade de São Paulo (USP) 8 Instituto Nacional de Pesquisas Espaciais (INPE) 9 Universidade de São Paulo (USP) | |||
| Author e-Mail Address | 1 plinio.jaqueto@iag.usp.br 2 3 4 5 6 7 8 marilia.shimizu@gmail.com | |||
| Journal | Frontiers in Earth Science | |||
| Volume | 9 | |||
| Pages | e634482 | |||
| History (UTC) | 2021-05-24 16:13:31 :: simone -> administrator :: 2021 2022-04-03 22:28:42 :: administrator -> simone :: 2021 | |||
| 3. Content and structure | ||||
| Is the master or a copy? | is the master | |||
| Content Stage | completed | |||
| Transferable | 1 | |||
| Content Type | External Contribution | |||
| Version Type | publisher | |||
| Keywords | environmental magnetism speleothem magnetism South America rock magnetism karst system stalagmites | |||
| Abstract | Fe-bearing minerals are a tiny fraction of the composition of speleothems. They have their origin in the karst system or are transported from the drainage basin into the cave. Recent studies on the magnetism of speleothems focused on the variations of their magnetic mineralogy in specific time intervals and are usually limited to a single sample. In this study, we describe a database of environmental magnetism parameters built from 22 stalagmites from different caves located in Brazil (South America) at different latitudes, comprising different climates and biomes. The magnetic signal observed in these stalagmites is dominated by low-coercivity minerals (similar to 20 mT) whose magnetic properties resemble those of the magnetite formed in pedogenic environments. Also, a comparison with few samples from soils and the carbonate from cave's walls shows a good agreement of the magnetic properties of speleothems with those of soil samples, reinforcing previous suggestions that in (sub-)tropical regimes, the dominant magnetic phase in speleothems is associated with the soil above the cave. Spearman's rank correlation points to a positive strong correlation between magnetic concentration parameters (mass-normalized magnetic susceptibility, natural remanent magnetization, anhysteretic remanent magnetization, and isothermal remanent magnetization). This implies that ultrafine ferrimagnetic minerals are the dominant phase in these (sub-)tropical karst systems, which extend across a diverse range of biomes. Although the samples are concentrated in the savannah biome (Cerrado) (similar to 70%), comparison with other biomes shows a higher concentration of magnetic minerals in speleothem underlying savannahs and lower concentration in those underlying moist broadleaf forests (Atlantic and Amazon biome) and dry forests (Caatinga). Thus, rainfall, biome, and epikarst dynamics play an important role in the concentration of magnetic minerals in speleothems in (sub-)tropical sites and indicate they can be an important target for paleoenvironmental research in cave systems. | |||
| Area | MET | |||
| Arrangement | urlib.net > BDMCI > Fonds > Produção a partir de 2021 > CGCT > Magnetic Mineralogy of... | |||
| doc Directory Content | access | |||
| source Directory Content | there are no files | |||
| agreement Directory Content |
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| 4. Conditions of access and use | ||||
| Language | en | |||
| Target File | feart-09-634482.pdf | |||
| User Group | simone | |||
| Reader Group | administrator simone | |||
| Visibility | shown | |||
| Read Permission | deny from all and allow from 150.163 | |||
| Update Permission | not transferred | |||
| 5. Allied materials | ||||
| Next Higher Units | 8JMKD3MGPCW/46KUATE | |||
| Citing Item List | ||||
| Dissemination | WEBSCI; PORTALCAPES; SCOPUS. | |||
| Host Collection | urlib.net/www/2017/11.22.19.04 | |||
| 6. Notes | ||||
| Empty Fields | alternatejournal archivingpolicy archivist callnumber copyholder copyright creatorhistory descriptionlevel e-mailaddress format isbn label lineage mark mirrorrepository nextedition notes number orcid parameterlist parentrepositories previousedition previouslowerunit progress project resumeid rightsholder schedulinginformation secondarydate secondarykey secondarymark session shorttitle sponsor subject tertiarymark tertiarytype url | |||
| 7. Description control | ||||
| e-Mail (login) | simone | |||
| update | ||||