Crustal structure from the Hecataeus Rise to the Levantine Basin, eastern Mediterranean, from seismic refraction and gravity modelling
Crustal structure from the Hecataeus Rise to the Levantine Basin, eastern Mediterranean, from seismic refraction and gravity modelling
复制标题
根据地震折射和重力模拟，从赫卡泰乌斯隆起到地中海东部黎凡特盆地的地壳结构
DOI：
10.1093/gji/ggv422
复制
发表时间：
2015
影响因子：
2.8
通讯作者：
Louden
中科院分区：
文献类型：
--
作者：
Welford;RahimiA;Reiche;Hübscher;Louden
2010年，沿着赫卡特乌斯隆起采集了广角地震反射/折射剖面，赫卡特乌斯隆起是地中海东部塞浦路斯以南的一个浅海海底区域。该剖面从赫卡特乌斯隆起，穿过塞浦路斯弧形，延伸到更远的莱温坦盆地。由于剖面长度较短，相应地缺乏深部射线覆盖，速度模拟得到重力模拟的补充，以获得对地壳深层结构的约束。合成的模型显示了赫卡特斯隆起的速度，没有证据表明存在像塞浦路斯大陆那样的浅蛇绿岩，而且这些速度并不能诊断出一种独特的地壳亲和力。低速沉积物至少占赫卡特斯隆起上部结构的7公里，这些沉积物覆盖在双层地壳之上。从重力模拟来看，Hecataeus隆起的沉积物和结壳组合似乎比西南方向的Eratosthenes海山地块要薄。在Hecataeus隆起的向海边缘下模拟了一个高速下地壳块，并根据重力模拟推断在隆起下向陆地延伸。在赫卡特乌斯隆起西南边缘附近的折射线上也发现了类似的高速地块，并被解释为在塞浦路斯弧内沉没的残留特提斯洋壳，沿该地区俯冲已停止。考虑到Hecataeus隆起模拟的厚厚沉积堆积下薄的双层地壳，我们解释Hecataeus Rise代表着在失败的俯冲带内聚集在一起的海洋碎片的拼贴。在Hecataeus隆起地壳的外侧，一个5公里深的低速盆地，可能是一个增生的楔形，似乎与在重合和沿走向的地震反射线上拍摄的塞浦路斯弧形变带相对应。在西侧的地震折射线上观察到类似的更宽的特征，这些特征结合在一起，可能揭示了地壳形变的向东锥形变带。在该剖面的南侧，莱万丁盆地似乎没有受到北侧碰撞的干扰，呈现出均匀而均匀的速度结构。
In 2010, a wide-angle seismic reflection/refraction profile was acquired along the Hecataeus Rise, an area of shallow seabed immediately south of Cyprus in the eastern Mediterranean. The profile crossed from the Hecataeus Rise, through the Cyprus Arc to the Levantine Basin beyond. Due to the short length of the profile and the corresponding lack of deep ray coverage, velocity modelling was complemented by gravity modelling to gain constraints on deep crustal structure. The resultant model reveals velocities for the Hecataeus Rise that show no evidence of shallow ophiolites like those seen on mainland Cyprus, and the velocities are not diagnostic of a unique crustal affinity. Low-velocity sediments make up at least 7 km of the upper structure of Hecataeus Rise and these sediments overlie a two-layered crust. From the gravity modelling, the combined sediments and crust of Hecataeus Rise appear to be thinner than the Eratosthenes Seamount block to the southwest. A high-velocity lower crustal block is modelled under the seaward edge of Hecataeus Rise and, based on the gravity modelling, is inferred to extend landwards beneath the Rise. Similar high-velocity blocks were identified on the southwestern edge of Hecataeus Rise along nearby refraction lines and were interpreted as remnant Tethyan oceanic crust, foundered in the Cyprus Arc, along which subduction has ceased in this area. Given the thin two-layered crust beneath a thick accumulation of sediments modelled for Hecataeus Rise, we interpret that Hecataeus Rise represents a collage of oceanic fragments, accreted together within the failed subduction zone. Outboard of the crust of Hecataeus Rise, a 5-km deep low-velocity basin, possibly an accretionary wedge, is imaged that appears to correspond with the Cyprus Arc deformation zone imaged on both coincident and along-strike seismic reflection lines. A similar and wider feature is observed on seismic refraction lines to the west and combined, these may be revealing an eastward tapering zone of crustal deformation. To the south of the profile, the Levantine Basin appears undisturbed by the collision to the north and exhibits a uniform and homogeneous velocity structure.
登录
查看更多内容
影响因子：
2.9
作者：
Jennifer Klimke;A. Ehrhardt
通讯作者：
Jennifer Klimke;A. Ehrhardt
东地中海盆地的新地壳结构：重力、磁力、地震折射和地震反射数据的详细集成和建模
DOI：
--
发表时间：
2007
期刊：
影响因子：
--
作者：
M. Longacre;P. Bentham;I. Hanbal;J. Cotton;R. Edwards
通讯作者：
R. Edwards
53. 埃拉托斯特尼海山：可能是东地中海早期大陆碰撞的先锋 1
DOI：
--
发表时间：
1998
期刊：
影响因子：
--
作者：
D. Kempler
通讯作者：
D. Kempler
东塞浦路斯岛弧的结构和构造
影响因子：
4.2
作者：
Z. Ben‐Avraham;G. Tibor;A. Limonov;M. B. Leybov;M. Ivanov;M. Tokarev;J. Woodside
通讯作者：
J. Woodside
活动微板块边缘盆地发育的不同构造控制：东地中海拉塔基亚盆地
影响因子：
2.9
作者：
J. Hall;A. Aksu;T. Calon;D. Yaşar
通讯作者：
D. Yaşar