Natrolite-group minerals were found in amygdules in Middle Eocene basaltic lavas in northern central Anatolia and have been evaluated in detail by petrographical, mineralogical, and chemical studies. A sequential formation of zeolites, which occurred in response to the interaction of the host rock with heated water, was determined by examination of the mineral assemblage. The compounds necessary for the formation of secondary minerals might have been derived from alteration of volcanic glass and Ca-rich pyroxenes in the host rock as well as from the associated marine sediments. Formation of fibrous zeolites on the walls of the amygdules began with a Na-rich zeolite, followed by a progressive increase in Ca content, and ended with a Ca-rich zeolite. The growth of natrolite as the earliest phase starts around an unidentified nucleus. It is followed by mesolite, which forms epitaxial overgrowths with natrolite. Scolecite is the last zeolite in the crystallization sequence. A continuous increase of the Si/Al ratio is observed from the earlier phase towards the later ones. The latest phase occupying the cavities within the amygdules is calcite.
Skip Nav Destination
Article navigation
Research Article|
July 01, 2015
Sequential Formation of Natrolite-group Zeolites in Amygdules of Basaltic Lavas
Sevgi Özen;
Sevgi Özen
§
Recep Tayyip Erdoğan University, Industrial Design Engineering, 53000 Fener-Rize, Turkey
§Corresponding author e-mail address:sevgi.ozen@erdogan.edu.tr
Search for other works by this author on:
M. Cemal GÖncÜoĞlu
M. Cemal GÖncÜoĞlu
Middle East Technical University, Geological Engineering Department, Ankara, Turkey
Search for other works by this author on:
Sevgi Özen
§
Recep Tayyip Erdoğan University, Industrial Design Engineering, 53000 Fener-Rize, Turkey
M. Cemal GÖncÜoĞlu
Middle East Technical University, Geological Engineering Department, Ankara, Turkey
§Corresponding author e-mail address:sevgi.ozen@erdogan.edu.tr
Publisher: Mineralogical Association of Canada
Received:
09 Mar 2015
Accepted:
17 Sep 2015
First Online:
16 Feb 2018
Online ISSN: 1499-1276
Print ISSN: 0008-4476
© 2015 Mineralogical Association of Canada
The Canadian Mineralogist (2015) 53 (4): 757–765.
Article history
Received:
09 Mar 2015
Accepted:
17 Sep 2015
First Online:
16 Feb 2018
Citation
Sevgi Özen, M. Cemal GÖncÜoĞlu; Sequential Formation of Natrolite-group Zeolites in Amygdules of Basaltic Lavas. The Canadian Mineralogist 2015;; 53 (4): 757–765. doi: https://doi.org/10.3749/canmin.1500036
Download citation file:
You could not be signed in. Please check your email address / username and password and try again.
Index Terms/Descriptors
- alteration
- amygdules
- Anatolia
- Asia
- basaltic composition
- basalts
- calcite
- carbonates
- Cenozoic
- chain silicates
- crystal growth
- crystallization
- electron microscopy data
- Eocene
- epitaxy
- framework silicates
- glasses
- igneous rocks
- lava
- mesolite
- Middle East
- middle Eocene
- mineral assemblages
- natrolite
- Paleogene
- petrography
- pyroxene group
- scolecite
- secondary minerals
- SEM data
- silicates
- Tertiary
- Turkey
- volcanic rocks
- zeolite group
- Yozgat Turkey
- Sorgun Turkey
Latitude & Longitude
Citing articles via
Related Articles
Mineralogical characterization of fibrous zeolites from the Kahrizak volcanic suite, south Tehran, Iran
Clay Minerals
ORIGIN OF SEPIOLITE AND LOUGHLINITE IN A NEOGENE VOLCANO-SEDIMENTARY LACUSTRINE ENVIRONMENT, MİHALlÇÇlK–ESKİŞEHİR, TURKEY
The Canadian Mineralogist
Related Book Content
Imprints of modal metasomatism in the post-Deccan subcontinental lithospheric mantle: petrological evidence from an ultramafic xenolith in an Eocene lamprophyre, NW India
Large Igneous Provinces from Gondwana and Adjacent Regions
Paralavas in a combustion metamorphic complex: Hatrurim Basin, Israel
Geology of Coal Fires: Case Studies from Around the World
Diagenesis, plagioclase dissolution and preservation of porosity in Eocene and Oligocene sandstones at the Greeley oil field, southern San Joaquin basin, California, USA
Reservoir Quality of Clastic and Carbonate Rocks: Analysis, Modelling and Prediction
Integrated mineralogical and rock magnetic study of Deccan red boles
Mass Extinctions, Volcanism, and Impacts: New Developments