The Cretaceous Alkaline Dyke Swarm in the Central Segment of the Asunción Rift, Eastern Paraguay : Its Regional Distribution, Mechanism of Emplacement, and Tectonic Significance
المؤلفون المشاركون
Velázquez, Victor F.
Gomes, Celso de Barros
Kirk, Jason
Riccomini, Claudio
المصدر
Journal of Geological Research
العدد
المجلد 2011، العدد 2011 (31 ديسمبر/كانون الأول 2011)، ص ص. 1-18، 18ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2011-04-27
دولة النشر
مصر
عدد الصفحات
18
التخصصات الرئيسية
الملخص EN
A structural analysis of Cretaceous alkaline dykes swarm associated with the central segment of the Asunción Rift is reported here.
Dykes are generally single near-vertical tabular bodies, less than 5 m wide, although multiple and composite intrusions also occur.
Many of these small bodies have been emplaced into Paleozoic sedimentary rocks and exhibit a regional NW-SE orientation pattern.
Petrographical and geochemical data allow recognition of two different lineages of potassic dykes: a silica-undersaturated suite ranging from basanite to phonolite (B-P) and a silica-saturated suite ranging from alkali basalt to trachyte (AB-T).
The morphological features, the regional en-échelon distribution, and the NW-SE orientation pattern suggest that the dykes were injected along fractures and faults, under a transtensional tectonic regime with σ1 NW/horizontal, σ2/vertical, and σ3 NE/horizontal.
Detailed analysis, combining dyke petrography, orientation pattern, and relative chronology reveals a rotation from WNW toward NNW during dyke emplacement.
In terms of the paleostress field orientation, the evidence indicates that the dykes were diachronically formed under a similar stress condition.
Finally, the pattern of orientation documented for the Cretaceous alkaline dykes of the Asunción Rift is consistent, temporally and spatially, with the phases of regional deformation that occurred during the process of the Atlantic Ocean opening.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Velázquez, Victor F.& Riccomini, Claudio& Gomes, Celso de Barros& Kirk, Jason. 2011. The Cretaceous Alkaline Dyke Swarm in the Central Segment of the Asunción Rift, Eastern Paraguay : Its Regional Distribution, Mechanism of Emplacement, and Tectonic Significance. Journal of Geological Research،Vol. 2011, no. 2011, pp.1-18.
https://search.emarefa.net/detail/BIM-510405
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Velázquez, Victor F.…[et al.]. The Cretaceous Alkaline Dyke Swarm in the Central Segment of the Asunción Rift, Eastern Paraguay : Its Regional Distribution, Mechanism of Emplacement, and Tectonic Significance. Journal of Geological Research No. 2011 (2011), pp.1-18.
https://search.emarefa.net/detail/BIM-510405
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Velázquez, Victor F.& Riccomini, Claudio& Gomes, Celso de Barros& Kirk, Jason. The Cretaceous Alkaline Dyke Swarm in the Central Segment of the Asunción Rift, Eastern Paraguay : Its Regional Distribution, Mechanism of Emplacement, and Tectonic Significance. Journal of Geological Research. 2011. Vol. 2011, no. 2011, pp.1-18.
https://search.emarefa.net/detail/BIM-510405
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-510405
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر