فارسي | English
  About Us | About Iran | Contact Us | Staff Info[Geoportal Info] [Maps] [Mining Info] [Other Activities]  
 
  News | Events | Photo Gallery | Downloads | Links | Kids  Search    Region    Scale    Subject   :Access to information by   Home | Newest   
 

News Comment
 
Geology
2017/05/16
NGDIR News Section--Changes in the composition of magma may have caused variations in the Panama Canal volcanic rock formations, according to a study published May 10, 2017 in the open-access journal PLOS ONE by David Farris from Florida State University, and colleagues.
  
   The Earth's crust is divided into tectonic plates and a chain of volcanoes can often appear in areas where one plates is pushed under another. Studying these locations can improve our understanding of how the Earth's crust is formed.
  
   The authors of the present study examined volcanic formations along the Panama Canal, which formed when the Panama block and South America collided approximately 21 to 25 million years ago. The researchers constructed geochemical models of these rock formations, and they identified some significant differences in their physical structure and chemical composition.
  
   The researchers found that the Oligocene Bas Obispo Formation and other older rock types had more abundant water-borne elements compared to the younger Pedro Miguel volcanic rocks. This Miocene unit is composed of multiple shallow 'maar' volcanic craters with alternating layers of explosively formed pyroclastic rocks, and fine-grained dark basaltic rock, formed from cooling lava flows. These layers suggest that multiple episodes of magma eruption and recharge occurred within the Pedro Miguel rock formation.
  
   The authors suggest that along the Panama Canal, changing tectonic conditions were brought about by the collision of the Panama block and South America. They state that changes in the composition of volcanic rocks likely drove a transition from water-bearing magmas to dry, hot magmas over time, and these magmas in turn caused different types of volcanoes to form. Additional research could further explore the relationship between magma composition, physical properties and volcanic forms in other areas of the world.
  
   Dr Farris notes: "This study examines the relationship between arc magmatism and tectonic change in a sequence of volcanic rocks along the Panama Canal. These rocks contain a change from wet to dry arc magmatism associated with the onset of collision between the Panama block and South America. In addition, the onset of hot, dry magmatism led to formation of explosive maar volcanic structures."
  
   By PLOS

 
 
Publications  Library
Glossary  Papers
 
 
 
 
FAQ  Members
Job Offer  Training
 
 
 
 
• Medical Geology Database 
• Geological Atlas of Roads 
• Marine Geology 
• Geography information 
• Mines and Deposits of Iran 
• Land Geophysics Database- Iran 
• Landslide Database of Iran 
• Exploration Area DB 
• Copper Database 
• Gold Database  
• Geoscience Laboratories 
• Mineral Information 
• Bibliographic Database 
• Geochemistry Database 
• Earthquake database 
• Abandoned mines DB of Iran 
• Mineral processing database 
• Minerals database 
 
 
 
 
Login Name:
Password:
Sign Up for membership ]
 
 
 
   Others Activities:• Geoscience database of ALBA • Geoscience Database of ECO • GEOLOGICAL SURVEY OF IRAN 
• Tajikistan Geoscience Database • Geo Database of Venezuela • 4th National Development Plan • Foreign Investment(FIPPA) 
• The general policies (Mines) • 26th Symposium on Geosciences • Ongoing projects   
 
 
Maps:• Map of Iran's Earthquake • Distribution Map of mineral Processing Plants 
• Mineral Distribution Map of Iran • Geosciences laboratories distribution map of Iran • Orohydrographic Map of Iran 
• Select state on iran map • Geological Map of Iran(1:1000, 000 Scale) • 2500 K Magnetic Lineament Map of Iran 
    
 
Best viewed:1024*768
National Geoscience Database Of IRAN
URL:www.ngdir.ir
Contact Mail:Info@ngdir.ir
 
 
 Search with:           
Designed by Payvand Software Group  Privacy | Copyright | Disclaimer