Detrital Cr-spinel in the Šambron–Kamenica Zone (Slovakia): evidence for an ocean-spreading zone in the Northern Vardar suture?
Detrital Cr-spinel in the Šambron–Kamenica Zone (Slovakia): evidence for an ocean-spreading zone in the Northern Vardar suture?
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DOI：
10.1007/s00531-007-0243-6
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发表时间：
2009-03
影响因子：
2.3
通讯作者：
D. Lenaz;C. Mazzoli;J. Spišiak;F. Princivalle;L. Maritan
中科院分区：
文献类型：
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作者：
D. Lenaz;C. Mazzoli;J. Spišiak;F. Princivalle;L. Maritan
尚布龙-卡梅尼察带位于莱沃奇山脉和沙里什卡高地的北方边缘，喀尔巴阡山脉中部的古近系在这里与皮耶尼尼克利彭带相连。这一地区的砂岩露头。从白垩纪到晚渐新世，这些沉积物的搬运方向分别为S和SE。该砂岩的重矿物组合包括铬尖晶石颗粒，主要显示II和III型阿尔卑斯橄榄岩的亲和性，是大洋岛玄武岩火山作用的代表。Vit'az上始新统沉积物样品显示出明显的铬尖晶石成分变化，其结果是具有I型和II型橄榄岩亲和力，并来自弧和大洋中脊玄武岩火山作用，沉积物输运方向为SW和WSW。这些数据表明，在上始新世构造环境的主要变化，限制斯洛伐克中央喀尔巴阡山脉的古地理重建。
The Šambron–Kamenica Zone is situated on the northern margin of the Levočské vrchy mountains and Šarišskà vrchovina Highland, where the Central Carpathian Paleogene joins the Pieniny Klippen Belt. Sandstone outcrops in this area. From Cretaceous to Late Oligocene in age, these sediments suggest transport directions from S and SE. The heavy mineral assemblages of this sandstone include Cr-spinel grains, mainly displaying types II and III alpine-peridotite affinities, and are representative of Ocean Island Basalt volcanism. A sample from Upper Eocene sediments at Vit’az shows a clear change in Cr-spinel composition, which turns out to have types I and II peridotite affinities, and to derive from arc and Middle Ocean Ridge Basalt volcanism, with sediment transport directions from SW and WSW. These data indicate major variations in the Upper Eocene tectonic setting, giving constraints to paleogeographic reconstruction of the Slovak Central Carpathians.