The mineralogical and geochemical composition of Holocene sediments from Lake Hazar, Elazığ, Eastern Turkey: implications for weathering, paleoclimate, redox conditions, provenance, and tectonic setting

Dicle Bal AKKOCA; Kürşad Kadir ERİŞ; Memet Namik ÇAĞATAY; Demet BİLTEKİN

Makale detayları

The mineralogical and geochemical composition of Holocene sediments from Lake Hazar, Elazığ, Eastern Turkey: implications for weathering, paleoclimate, redox conditions, provenance, and tectonic setting

Yazarlar:

Dicle Bal AKKOCA | Kürşad Kadir ERİŞ | Memet Namik ÇAĞATAY | Demet BİLTEKİN

Yayıncı:

TUBITAK

Ana Başlıklar:

Uygulamalı fizik

Dergi:

Turkish Journal of Earth Sciences 2019 Vol.28 Issue 5, pp.760-785

Belge Tipi:

Makale

Yayın Tarihi:

9/2019

Belge Dili:

İngilizce

Document ID (Org No.):

2000730985

Sıklık:

İki Aylık

eISSN:

1303-619X

pISSN:

1300-0985

Özet:

 

Mineralogical and geochemical analyses of samples collected from piston core HZ11-P01 at the western margin of Lake  Hazar were studied to determine the provenance and weathering conditions on the source area together with tectonic setting of the  source rocks, paleoclimate of the region, and paleo-redox conditions of the lake sediments. Nonclay minerals in the sediment core are  represented by feldspar, quartz, dolomite, and calcite. The clay mineral assemblage consists of smectite/chlorite mixed-layer clay, chlorite,  and illite. Most major, trace, and rare earth element contents of the lake samples are generally similar to those of the catchment area.  Chondrite-normalized rare earth element patterns of the lake samples are characterized by enrichment of light rare earth elements, a  relatively flat heavy rare earth element pattern, and no Eu negative anomaly. The chemical index of alteration and index of compositional  variability of the core sediment suggested that the intensity of weathering in the source area was low to moderate. The paleoclimatic  indicator (C-values) showed that a paleoclimate changing from semiarid to semimoist prevailed during the last ~2 ka BP. Authigenic U  and element ratios such as Th/U, Ni/Co, Cu/Zn, V/Cr, Eu/Eu*, and Ce/Ce* indicate that the lake sediments were deposited under oxic  conditions. La/Sc, Co/Th, Cr/Th, Zr/Sc, and Th/Sc element ratios in the core sediments are consistent with values of sediments derived  from mainly mafic and intermediate source rocks. According to discriminant-function diagrams, lake samples are plotted within the arc  setting and arc-continent collision, which is in accordance with the geology of the study area.

Makale detayları

The mineralogical and geochemical composition of Holocene sediments from Lake Hazar, Elazığ, Eastern Turkey: implications for weathering, paleoclimate, redox conditions, provenance, and tectonic setting

Yazarlar: Dicle Bal AKKOCA | Kürşad Kadir ERİŞ | Memet Namik ÇAĞATAY | Demet BİLTEKİN

Yayıncı: TUBITAK

Ana Başlıklar: Uygulamalı fizik

Dergi: Turkish Journal of Earth Sciences 2019 Vol.28 Issue 5, pp.760-785

Belge Tipi: Makale

Yayın Tarihi: 9/2019

Belge Dili: İngilizce

Document ID (Org No.): 2000730985

Sıklık: İki Aylık

eISSN: 1303-619X

pISSN: 1300-0985

Sayı

Yazarlar:

Dicle Bal AKKOCA | Kürşad Kadir ERİŞ | Memet Namik ÇAĞATAY | Demet BİLTEKİN

Yayıncı:

TUBITAK

Ana Başlıklar:

Uygulamalı fizik

Dergi:

Turkish Journal of Earth Sciences 2019 Vol.28 Issue 5, pp.760-785

Belge Tipi:

Makale

Yayın Tarihi:

9/2019

Belge Dili:

İngilizce

Document ID (Org No.):

2000730985

Sıklık:

İki Aylık

eISSN:

1303-619X

pISSN:

1300-0985