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地图电子出版系统的推广使用, 缩短了地图生产的周期。但地图目前的打样方式仍是传统的机械打样, 形成了印前工艺过程的“瓶颈”。数字式打样取代传统机械打样是印刷方式由模拟式向数字式转变的需要, 其中关键要解决好版式打样与颜色打样的方案。同时, 数字式打样和传统工艺还有一些不相适应的地方, 需要在技术上和工艺流程中改进和调整。 相似文献
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FMS成像测井是较为先进的测井技术,由于其具有高分辨率、直观性等特点,在原始产状恢复、沉积相态研究中有广泛的应用.位于西北太平洋的Shatsky(沙茨基)海隆是综合大洋钻探计划324航次的重点研究区域,通过对该航次U1347A、U1348 A、U1349 A 3口钻井中的FMS成像测井资料的处理及相应地质构造的解释、产状恢复,进行了构造应力场的探讨.得出结论是,Shatsky海隆TAMU地块的形成比较符合大洋中脊扩张学说,而对Ori地决的应力场分析则显示Ori地块的形成较符合地幔柱头假说. 相似文献
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This paper presents a compilation of 16 present-day stress tensors along the southern Caribbean plate boundary zone (PBZ), and particularly in western and along northern Venezuela. As a trial, these new stress tensors along PBZ have been calculated from inversion of 125 focal mechanism solutions (FMS) by applying the Angelier & Mechler's dihedral method, which were originally gathered by the first author and published in 2005. These new tensors are compared to those 59 tensors inverted from fault-slip data measured only in Plio-Quaternary sedimentary rocks, compiled in Audemard et al. (2005), which were originally calculated by several researchers through the inversion methods developed by Angelier and Mechler or Etchecopar et al.The two sets of stress tensors, one derived from geological data and the other one from seismological data, compare very well throughout the PBZ in terms of both stress orientation and shape of the stress tensor. This region is characterized by a compressive strike-slip (transpressional senso lato), occasionally compressional, regime from the southern Mérida Andes on the southwest to the gulf of Paria in the east. Significant changes in direction of the maximum horizontal stress (σH = σ1) can be established along it though. The σ1 direction varies progressively from nearly east-west in the southern Andes (SW Venezuela) to between NW-SE and NNW-SSE in northwestern Venezuela; this direction remaining constant across northern Venezuela, from Colombia to Trinidad. In addition, the σV defined by inversion of focal mechanisms or by the shape of the stress ellipsoid derived from the Etchecopar et al.'s method better characterize whether the stress regime is transpressional or compressional, or even very rarely trantensional at local scale.The orientation and space variation of this regional stress field in western Venezuela results from the addition of the two major neighbouring interplate maximum horizontal stress orientations (σH): roughly east-west trending stress across the Nazca-South America type-B subduction along the pacific coast of Colombia and NNW-SSE oriented one across the southern Caribbean PBZ. Meanwhile, northern Venezuela, although dextral strike-slip (SS) is the dominant process, NW-SE to NNW-SSE compression is also taking place, which are both also supported by recent GPS results. 相似文献
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本文将台湾海峡及其邻区划分为多个具有不同弹性参数的等厚区块,并利用基于弹性理论的有限元数值模型,以GPS观测速度和由震源机制解(FMS)得到的主应力轴方向为约束条件,计算了该研究区的现今构造应力场.结果表明:(1)最大主应力轴在台湾海峡中部和台湾岛弧中部大致为NW-SE向,在东北部呈顺时针旋转,而在南部呈逆时针旋转;(2)研究区水平位移场大致以23°N为界,南强北弱,且在北部呈顺时针旋转,南部呈逆时针旋转;(3)东沙-澎湖-北港隆起因强度大于周边盆地区而成为"阻挡带",导致在其南北出现两个反向的构造逃逸区,并且隆起东南区形变特别强烈,而其西北区则相对较弱. 相似文献
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