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首页> 外文期刊>Journal of Asian earth sciences >Magma tic occurrences in the Central Arava (southern Israel) based on Geology and Magnetometry
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Magma tic occurrences in the Central Arava (southern Israel) based on Geology and Magnetometry

机译：基于地质学和磁力计的中部阿拉瓦（以色列南部）岩浆活动

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The Eshet Ridge is located in the Central Arava near Wadi Paran. Geological data were collected using ground magnetic surveys and petrophysical measurements (magnetic susceptibility and density). The goal was to reveal the structure and nature of a concealed magmatic body under the ridge. Integrated gravity and magnetic interpretation together with seismic reflection data (including 2_(3/4) modeling) indicated the presence of a deep-seated basic magmatic intrusion. Occurrence of Fe-mineralized rocks along the ridge supports subsurface data. The magmatic body was intruded in the hard Turanian rocks of the Eshet Ridge. Basic magmatic exposures dating from the Early Miocene were evident along Wadi Ashosh (in the eastern Negev) and its margins 18 km. to the north of the ridge. A new outcrop of basic magmatic intrusion was found southwest of the Tzukim settlement. Magnetic measurements indicated a similarity between their magnetic pattern and the Ashosh basic magmatics, which were dated to 20.4 ± 0.7 Ma. Volcanoclastic tuff pebbles (magnetic susceptibility of around 2-7 * 10~(-3) SI) surrounded by conglomerate were discovered at two sites in Wadi Demma and Wadi Menuha (streams that drain near the Eshet Ridge and 2 km south of it, respectively). The conglomerates contained mostly limestone, chalk and chert fragments; not more than 5% of which were volcanic pebbles. Two pebbles were dated to 24.4 ± 0.7and 21.5 ± 0.5 Ma. The magmatic outcrops in Wadi Ashosh, the magmatic dyke near Tzukim and the volcanic purple and black pebbles near Wadi Menuha were all dated to the very Late Oligocene-Early Miocene. The magmatic body identified in this study under the Eshet Ridge was termed the Eshet Intrusion and is connected to, and even the source of, all these phenomena.
机译：Eshet山脊位于中央Arava，靠近Wadi Paran。地质数据是使用地磁测量和岩石物理测量（磁化率和密度）收集的。目的是揭示山脊下方隐藏的岩浆体的结构和性质。综合的重力和磁解释以及地震反射数据（包括2_（3/4）建模）表明存在深层的基本岩浆侵入。沿山脊的铁矿化岩石的出现支持了地下数据。岩浆体侵入了埃希特山脊的坚硬的图拉尼亚岩石中。 Wadi Ashosh（在内格夫东部）及其边缘18 km处可以看到中新世早期的岩浆暴露。在山脊的北部。在Tzukim定居点西南方发现了一个新的基本岩浆侵入露头。磁测量表明，其磁模式与Ashosh基本岩浆之间的相似性可追溯至20.4±0.7 Ma。在瓦迪德玛和瓦迪梅尼亚的两个地点发现了火山碎屑凝灰岩卵石（磁化率约为2-7 * 10〜（-3）SI），被砾岩包围（溪流在Eshet山脊附近和南2公里处流失） ）。这些集团主要包含石灰石，白垩和石碎片。火山卵石不超过5％。两个卵石的日期分别为24.4±0.7和21.5±0.5 Ma。 Wadi Ashosh的岩浆露头，Tzukim附近的岩浆堤和Wadi Menuha附近的火山紫色和黑色鹅卵石都可追溯到晚渐新世-早中新世。在这项研究中，在埃谢特山脊下方发现的岩浆体被称为埃谢特侵入岩，并且与所有这些现象有关，甚至是这些现象的根源。

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