| Kietzmann | Дата: Saturday, 22.10.2011, 03:13 | Сообщение # 1 |
1
Group: Проверенные
Posts: 15
Reputation: 0
Status: Offline
| Kietzmann D.A., Martín-Chivelet J., Palma R.M., López-Gómez J., Lescano M., Concheyro M. (2011) Evidence of precessional and eccentricity orbital cycles in a Tithonian source rock: The mid-outer carbonate ramp of the Vaca Muerta Formation, northern Neuquén Basin, Argentina // AAPG Bulletin. Vol. 95. no.9. P. 1459–1474.
http://s3.amazonaws.com/academi....TVJo%3D
Basin to mid-ramp cyclic facies of the Tithonian Vaca Muerta Formation are exposed in the Loncoche Creek section of the Neuquén Basin, Mendoza province, Argentina. This unit is characterized by a decimeter-scale rhythmic alternation of marls, shales and limestones and extends from the lower Tithonian to the upper Berriasian. Cyclostratigraphic studies based on a detailed facies analysis allowed the identification of cyclic patterns with frequencies within the Milankovitch band. According to biostratigraphic data, the dominant cycle in the studied section has a period of 20 k.y., which correlates with the Earth’s axis precession element. Spectral analysis based on a series of compacted and decompacted cycle thickness identified a subordinate frequency of about 90 to 120 k.y., which we interpret as the modulation of the precessional cycle caused by the Earth’s orbital eccentricity. The strength of the precession signal, together with the absence of a welldefined cyclicity attributable to the obliquity orbital cycle (i.e., ∼40 k.y.), is in agreement with previous data from the Northern Hemisphere.
Edited by Kietzmann - Saturday, 22.10.2011, 03:56 |
| |
| |
| mhorn | Дата: Thursday, 27.10.2011, 20:42 | Сообщение # 2 |
Admin
Group: Администраторы
Posts: 1060
Reputation: 0
Status: Offline
| Dear Diego, unfortunately pdf cannod be open due to error (access denied)
Middle Jurassic - Lower Cretaceous ammonites & aptychi
|
| |
| |
| mhorn | Дата: Sunday, 30.10.2011, 19:40 | Сообщение # 3 |
|
Admin
Group: Администраторы
Posts: 1060
Reputation: 0
Status: Offline
| UPD this paper is available for downloading for those who registered at academia.edu
link to article is: http://uba.academia.edu/DiegoKi....ormatio n_Northern_Neuquen_Basin_Argentina
Middle Jurassic - Lower Cretaceous ammonites & aptychi
|
| |
| |
| Kietzmann | Дата: Wednesday, 06.03.2013, 06:40 | Сообщение # 4 |
|
1
Group: Проверенные
Posts: 15
Reputation: 0
Status: Offline
| I leave you another link
http://ifile.it/rd58s7g/Kietzmann%20et%20al.%202011_AAPG%20Bull..pdfAdded (06.03.2013, 06:40)
---------------------------------------------
http://uploaded.net/file/oernw52s
|
| |
| |
