 |
| Titel |
Contact relations and petrography of the Solarya intrusive complex (NW Turkey) |
| VerfasserIn |
Işıl Nur Güraslan, Alp Ünal, Safak Altunkaynak |
| Konferenz |
EGU General Assembly 2016
|
| Medientyp |
Artikel
|
| Sprache |
en
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250128919
|
| Publikation (Nr.) |
 EGU/EGU2016-8965.pdf |
|
|
|
|
|
| Zusammenfassung |
| Solarya pluton is a N-S trending intrusive body exposed in the North of the Balikesir city in
NW Anatolia. It is Early Miocene in age and intruded into the Nilüfer and Hodul unit
of Karakaya complex representing Triassic metamorphic and non-metamorphic
basement of Sakarya Continent. Solarya plutonic complex consists of three granitic
rock members: Porphyritic granodiorite with K-feldspar (orthoclase) megacrystals,
microgranite-microgranodiorite and haplogranite. Coarse grained porphyritic granodiorite is
common in northern part of the pluton while the southern part of the pluton is formed from
microgranite-microgranodiorite. Haplogranite was emplaced between the pluton and the
metamorphic country rocks and surrounds the pluton as a thin light coloured outer zone along
northern half of the border. Haplogranitic envelope zone display graphic and granophyric
textures. Main plutonic body also contains mafic enclaves and syn-plutonic mafic dykes.
Along the southern border, the fine grained chilled margin of Solarya pluton gradually passes
into the hypabyssal and volcanic rocks. At the western border of the pluton, a young fault
separates the pluton from non-metamorphic Hodul Unit of Karakaya complex. Along the
northern and eastern margin, Solarya pluton intruded into metamorphic rocks of
Nilüfer Unit which consist mainly of marbles, metapelites and metabasites. Solarya
intrusive complex developed contact metamorphism in a narrow zone (150-200 m)
around its eastern margin between the marbles which reaches to hornblende-hornfels
facies conditions. The grain sizes of the marbles grow towards the margin of the
pluton. Contact metamorphic rocks surrounding the intrusive body are common with
granoblastic texture and display calcite + plagioclase + tremolite + diopside + garnet
± quartz mineral paragenesis dominantly. This mineral paragenesis suggest that
the contact metamorphic aureole has developed under 500-550 C˚ and 2-3 kbar
temperature and pressure conditions, which refers to hornblend hornfels metamorphic
facies.
Field relations and petrographical analyses of intrusive complex and the surrounding
contact aureole indicate that the southern part of the Solarya intrusive complex emplaced into
shallow levels in the crust (<1.5 km), although the northern part of the complex has contact
metamorphic mineral paragenesis typical of relatively deeper levels of epizone. |
|
|
|
|
|
|