KOCASEYİT POLİMETALİK Cu-As-Ni-Pb DAMAR TİPİ CEVHERLEŞMENİN JEOKİMYASAL VE MİNERALOJİK İNCELENMESİ, HAVRAN (BALIKESİR), KB TÜRKİYE

Demet Kıran Yıldırım; Amr Abdelnasser; Mustafa Kumral

doi:10.17780/ksujes.1219019

EN TR

GEOCHEMICAL AND MINERALOGICAL INVESTIGATION OF KOCASEYİT POLYMETALLIC Cu-As-Ni-Pb VEIN-TYPE MINERALIZATION, HAVRAN (BALIKESİR), NW TÜRKİYE

Abstract

This study aims to provide a better understanding of the genesis of the polymetallic Cu-As-Ni-Pb vein-type mineralization in the Kocaseyit area (Balkesir-Havran district), NW Turkey. This is accomplished by examining the mineralogical, petrological, and geochemical properties of this mineralization and the associated hydrothermal alteration types. The Kocaseyit area is made up of Upper Paleozoic Kalabak Formation, Jurassic Bayırköy, Bilecik Formations, and Paleocene-Eocene Bağburun Formation that were intruded by Oligocene-Miocene Düztarla Pluton. The polymetallic Cu-As-Ni-Pb vein-type mineralization was occurred along the NE-SW fault zone at the arkosic sandstone in contact with the Düztarla granitoids. Intense sericitization, kaolinization, and pyritization are the predominant alteration types associated with mineralization with subordinate carbonatization and chloritization. Three main phases of mineralization are observed in Kocaseyit area. (1) the magmatic-hydrothermal phase has pentlandite, pyrite, and some arsenopyrite minerals. (2) The hydrothermal phase exhibits pyrite, arsenopyrite, chalcopyrite, and sphalerite minerals. In the supergene phase (3), malachite, covellite, and goethite were formed after chalcopyrite and pyrite, respectively. The granitoid rocks exhibit typical calc-alkaline metaluminous I-type granites. They were classified as granodiorite, monzonite, and quartz-monzonite for the granodiorite samples and as granite for the granite samples, matched with magnetite series, and were formed in a late-orogenic environment. The geochemical features of the altered rocks revealed that they are strongly affected by the sericite-pyrite-chlorite alteration with subordinate Mn-carbonate-sericite-chlorite alteration. The behavior of rare earth elements (REE) during alteration and mineralization processes reveals the correlations of alteration index and K2O index with Light rare earth elements (LREE) and Heavy rare earth elements (HREE) show that either LREEs were preferentially added to the rocks from hydrothermal solution, or LREEs were not leached from the rocks. Based on the relationship of MgO index between HREE and LREE, the sericitization (K-rich) formation occurs more widely and intensely than chlorite formation.

Keywords

KOCASEYİT POLİMETALİK Cu-As-Ni-Pb DAMAR TİPİ CEVHERLEŞMENİN JEOKİMYASAL VE MİNERALOJİK İNCELENMESİ, HAVRAN (BALIKESİR), KB TÜRKİYE

Öz

Bu çalışmanın temel amacı, Türkiye'nin kuzeybatısındaki Kocaseyit bölgesindeki (Balkesir-Havran ilçesi) polimetalik Cu-As-Ni-Pb damar tipi mineralizasyonunun kökenini daha iyi anlamaktır. Bu, mineralizasyonun ve ilişkili olduğu hidrotermal alterasyon türlerinin mineralojik, petrolojik ve jeokimyasal özelliklerinin incelenmesiyle gerçekleştirilmiştir. Kocaseyit bölgesi, Üst Paleozoik yaşlı Kalabak Formasyonu, Jura yaşlı Bayırköy ve Bilecik Formasyonları ile Oligosen-Miyosen yaşlı Düztarla granitoyitleri tarafından kesilen Paleosen-Eosen yaşlı Bağburun Formasyonundan oluşmaktadır. Düztarla granitoyitleri ile dokanaktaki Balya Formasyonu'ndaki (arkozik kumtaşları) KD-GB fay zonu boyunca lokalize olan polimetalik Cu-As-Ni-Pb damar tipi cevherleşme göstermektedir. Cevherleşme ile ilişkili olarak az miktarda karbonatlaşma ve kloritleşme ile birlikte yoğun serisitleşme, kaolinleşme ve piritleşme, çalışma alanında gözlenen baskın alterasyon tipleridir. Çalışma alanında üç cevherleşme fazı belirlenmiştir.Magmatik-hidrotermal fazda, pentlandit, pirit ve bazı arsenopirit minerallerinin oluştuğu gözlenmektedir. Hidrotermal fazda, pirit, arsenopirit, kalkopirit ve sfalerit mineralleri oluşmuştur. Süpergen faz döneminde ise kalkopirit ve piritten sonra sırasıyla malakit, kovellit ve götit oluşumları belirlenmiştir. Granitoyid kayaçlar, kalk-alkali metaalumina I-tipi granitlere özgü özellikler sergilemektedir. Granodiyorit örnekleri granodiyorit, monzonit ve kuvars-monzonit, granit örnekleri ise granit olarak sınıflandırılmış, manyetit serileri ile uyumlu ve geç orojenik ortamda oluşmuşlardır. Alterasyona uğramış kayaçların jeokimyasal özellikleri, bunların Mn-karbonat-serisit-klorit alterasyonu ile birlikte serisit-pirit-klorit alterasyonundan güçlü bir şekilde etkilendiklerini ortaya koymuştur. Alterasyon indeksi ve K2O indeksinin Hafif nadir toprak elementleri (HNTE) ve Ağır nadir toprak elementleri (ANTE) ile korelasyonlarına göre ya HNTE'lerin hidrotermal çözeltilerden kayalara taşınabildiğini ya da HNTE'lerinin kayalarda zenginleştiğini göstermektedir. MgO indeksinin HNTE ve ANTE arasındaki ilişkiye göre, serisitleşme (K bakımından zengin) oluşumunun kloritleşme oluşumundan daha yaygın ve yoğun bir şekilde meydana geldiğini göstermektedir.

Anahtar Kelimeler

Thanks

Öncelikle İTÜ Rektörlüğü’ne, jeokimyasal analizler sırasındaki çabaları dolayısıyla İstanbul Teknik Üniversitesi Jeokimya Araştırma Laboratuvarı (ITU-JAL) çalışma ekibine ve bilimsel olarak makalenin gelişmesini sağlayan editör ve hakemlere teşekkür ederiz.

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Details

Primary Language

Turkish

Subjects

Geological Sciences and Engineering (Other)

Journal Section

Research Article

Authors

Demet Kıran Yıldırım ^*
0000-0001-5995-5723
Türkiye

Amr Abdelnasser
0000-0001-5994-7088
Türkiye

Mustafa Kumral
0000-0001-7827-8721
Türkiye

Publication Date

June 3, 2023

Submission Date

December 14, 2022

Acceptance Date

March 20, 2023

Published in Issue

Year 2023 Volume: 26 Number: 2

DOI

https://doi.org/10.17780/ksujes.1219019

IZ

https://izlik.org/JA76DH66JT

Cite

RIS / Bibtex

APA

Yıldırım, D. K., Abdelnasser, A., & Kumral, M. (2023). KOCASEYİT POLİMETALİK Cu-As-Ni-Pb DAMAR TİPİ CEVHERLEŞMENİN JEOKİMYASAL VE MİNERALOJİK İNCELENMESİ, HAVRAN (BALIKESİR), KB TÜRKİYE. Kahramanmaraş Sütçü İmam Üniversitesi Mühendislik Bilimleri Dergisi, 26(2), 489-505. https://doi.org/10.17780/ksujes.1219019