气候变化领域集成服务门户(CCPortal): K–Ar age constraints on the sources of K minerals in bentonites of the Ankara-Çankırı Basin; Central Anatolia; Turkey

CCPortal

DOI	10.1007/s00531-020-01904-x
	K–Ar age constraints on the sources of K minerals in bentonites of the Ankara-Çankırı Basin; Central Anatolia; Turkey
	Elliott W.C.; Wampler J.M.; Kadir S.; Külah T.; Hewitt K.C.; Önalgil N.; Erkoyun H.
发表日期	2020
ISSN	14373254
起始页码	2353
结束页码	2367
卷号	109 期号:7
英文摘要	Many of the bentonite deposits of the Ankara-Çankırı Basin, Central Anatolia, Turkey were found within the Miocene Hancılı Formation, which comprises lacustrine sedimentary and volcaniclastic rocks that interfinger with Uludere pyroclastic rocks of the Miocene Galatean volcanic province. In the present study, the conventional K–Ar geochronological method was used to evaluate the contribution of volcanic materials to the K-bearing components of the bentonite clay fractions. Four dacite samples from near the southern end of the basin were indistinguishable in K–Ar age (average 18.4 Ma, standard deviation 0.3 Ma). K–Ar measurements of feldspar-enriched rock fragments and hydrobiotite separated from andesitic tuff from near the northern end of the basin indicated an age of 17 ± 1 Ma. The K–Ar age values of clay fractions of bentonites, which ranged from 77 ± 5 Ma to 162 ± 5 Ma, indicate that most of the K in the bentonite clay fractions occurs in minerals derived from the Mesozoic basement rocks adjacent to the Miocene basin. The K–Ar age values support field observations indicating that these bentonites are secondary bentonites formed by alteration of volcanic components during or after deposition of volcaniclastic phases. The K-bearing mineral components of these clay fractions consisted mostly of unaltered illitic material of detrital origin whereas the smectitic components were formed by alteration of Miocene pyroclastic materials. © 2020, Geologische Vereinigung e.V. (GV).
英文关键词	Ankara-Çankırı Basin; Bentonite; K–Ar age; Turkey; Volcaniclastics
语种	英语
scopus关键词	bentonite; geochronology; illite; Mesozoic; mineralogy; Miocene; potassium; potassium-argon dating; source rock; volcaniclastic deposit; Ankara Basin; Ankara [Turkey]; Cankiri Basin; Turkey
来源期刊	International Journal of Earth Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/147622
作者单位	Department of Geosciences, Georgia State University, Atlanta, GA 30302-3965, United States; Department of Geological Engineering, Eskişehir Osmangazi University, Eskisehir, 26480, Turkey; Department of Geological Engineering, Kütahya Dumlupınar University, Kütahya, 43100, Turkey
推荐引用方式 GB/T 7714	Elliott W.C.,Wampler J.M.,Kadir S.,等. K–Ar age constraints on the sources of K minerals in bentonites of the Ankara-Çankırı Basin; Central Anatolia; Turkey[J],2020,109(7).
APA	Elliott W.C..,Wampler J.M..,Kadir S..,Külah T..,Hewitt K.C..,...&Erkoyun H..(2020).K–Ar age constraints on the sources of K minerals in bentonites of the Ankara-Çankırı Basin; Central Anatolia; Turkey.International Journal of Earth Sciences,109(7).
MLA	Elliott W.C.,et al."K–Ar age constraints on the sources of K minerals in bentonites of the Ankara-Çankırı Basin; Central Anatolia; Turkey".International Journal of Earth Sciences 109.7(2020).