Sedimentation conditions and rock-magnetic properties of Quaternary deposits from Laguna de Santa Rosa, Iturbide region, northeastern Mexico
Fuente:
Redalyc
Saved in:
| Main Author: | |
|---|---|
| Format: | Artículo científico |
| Language: | en |
| Published: |
Universidad Nacional Autónoma de México
2003
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1876461856162316288 |
|---|---|
| author | M. A. Ruiz Martínez |
| author_facet | M. A. Ruiz Martínez |
| contents | Sedimentation conditions and rock-magnetic properties of Quaternary deposits from Laguna de Santa Rosa, Iturbide region, northeastern Mexico M. A. Ruiz Martínez J. Werner H.- W. Hubberten T. Adatte E. Escobar Hernández A. De León A. Arciniega Ceballos M. Hernández Ciencias de la Tierra Rock clays magnetism Quaternary northeastern Mexico We report initial results of an interdisciplinary study of the lacustrine sequence of Laguna de Santa Rosa, based on a 26 mlong core recovered from its northern-central sector. The Laguna is an intramontane elongated basin with a small catchment areaat an altitude of 1520 m asl in the central sector of the Sierra Madre Oriental in the Iturbide region, northeastern Mexico. Thestratigraphic variations of rock-magnetic properties, total carbonate content and isotopic carbon, and mineralogy define threemajor zones separated by peaks of the calcite to quartz+phyllosilicate+feldspar ratio. The upper zone, from surface to 7-9 m, isformed by an organic clay with abundant gasteropods and two black to green clays. It is characterized by magnetic susceptibilityaround 10-6 SI, frequency dependent factor of 0 %, δ13 C ranging from 20.3 at surface to 26.4 , presence of quartz andphyllosilicates with generally more than 20 % calcite, and sporadic occurrence of plagioclase (albite) with K-feldspars nearlyabsent. The middle zone, from 9 m to 17.5 m, is formed by five clay units with colors ranging from green gray to brown. This zoneis characterized by variable susceptibility up to 17 10-6 SI, negative frequency dependent factors, low total carbon content, quartzand phyllosilicate enrichment, less calcite and presence of K-feldspars. This middle zone shows higher detrital input and/orreduced productivity, which suggests a cold and less humid interval. The lower zone extends from 17.5 m to 26 m and shows twobrown to green gray clay units. This zone is characterized by magnetic susceptibility between 8 10-6 SI and 14 10-6 SI, variablefrequency dependent factors, and δ13 C values around 24 . Its mineralogy is similar to the upper zone, again enriched in calciteand occurrence of plagioclase. The phyllosilicate fraction is mainly composed of mica, chlorite, smectite and kaolinite. Themagnetic minerals are allogenic, derived from the lutites that form the catchment basin. 2003 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56842102 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.1 Vol.42 |
| format | Artículo científico |
| id | redalyc_56842102 |
| institution | Redalyc |
| language | en |
| publishDate | 2003 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Sedimentation conditions and rock-magnetic properties of Quaternary deposits from Laguna de Santa Rosa, Iturbide region, northeastern Mexico M. A. Ruiz Martínez Ciencias de la Tierra Rock clays magnetism Quaternary northeastern Mexico Sedimentation conditions and rock-magnetic properties of Quaternary deposits from Laguna de Santa Rosa, Iturbide region, northeastern Mexico M. A. Ruiz Martínez J. Werner H.- W. Hubberten T. Adatte E. Escobar Hernández A. De León A. Arciniega Ceballos M. Hernández Ciencias de la Tierra Rock clays magnetism Quaternary northeastern Mexico We report initial results of an interdisciplinary study of the lacustrine sequence of Laguna de Santa Rosa, based on a 26 mlong core recovered from its northern-central sector. The Laguna is an intramontane elongated basin with a small catchment areaat an altitude of 1520 m asl in the central sector of the Sierra Madre Oriental in the Iturbide region, northeastern Mexico. Thestratigraphic variations of rock-magnetic properties, total carbonate content and isotopic carbon, and mineralogy define threemajor zones separated by peaks of the calcite to quartz+phyllosilicate+feldspar ratio. The upper zone, from surface to 7-9 m, isformed by an organic clay with abundant gasteropods and two black to green clays. It is characterized by magnetic susceptibilityaround 10-6 SI, frequency dependent factor of 0 %, δ13 C ranging from 20.3 at surface to 26.4 , presence of quartz andphyllosilicates with generally more than 20 % calcite, and sporadic occurrence of plagioclase (albite) with K-feldspars nearlyabsent. The middle zone, from 9 m to 17.5 m, is formed by five clay units with colors ranging from green gray to brown. This zoneis characterized by variable susceptibility up to 17 10-6 SI, negative frequency dependent factors, low total carbon content, quartzand phyllosilicate enrichment, less calcite and presence of K-feldspars. This middle zone shows higher detrital input and/orreduced productivity, which suggests a cold and less humid interval. The lower zone extends from 17.5 m to 26 m and shows twobrown to green gray clay units. This zone is characterized by magnetic susceptibility between 8 10-6 SI and 14 10-6 SI, variablefrequency dependent factors, and δ13 C values around 24 . Its mineralogy is similar to the upper zone, again enriched in calciteand occurrence of plagioclase. The phyllosilicate fraction is mainly composed of mica, chlorite, smectite and kaolinite. Themagnetic minerals are allogenic, derived from the lutites that form the catchment basin. 2003 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56842102 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.1 Vol.42 |
| title | Sedimentation conditions and rock-magnetic properties of Quaternary deposits from Laguna de Santa Rosa, Iturbide region, northeastern Mexico |
| topic | Ciencias de la Tierra Rock clays magnetism Quaternary northeastern Mexico |
| url | https://www.redalyc.org/articulo.oa?id=56842102 |