Relationship of Internal to External Structure of Salt Domes

Relationship of Internal to External Structure of Salt Domes
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盐丘内外结构关系

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发表时间:
1968
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影响因子:
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通讯作者:
D. H. Kupfer
D. H. Kupfer
中科院分区:
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文献类型:
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作者:
D. H. Kupfer

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在内部,盐股包括等倾,衰减,垂直倾伏,重折叠,和断层褶皱类似的手帕从中心垂直通过一个小环。褶皱是通过流动,而不是弯曲;褶皱相应地是复杂的和衰减的,但是单轴的。互层碎屑沉积物和非石盐盐可能已在运动过程中消除。岩盐晶体的应变硬化以及不同的沉积速率可能导致运动在空间和时间上都是间歇性的,并强烈影响了内部结构。外部构造(如地堑和断层)可能与内部构造(如断层、剪切带和差异运动带)有关。石油地质学家和盐组构地质学家之间需要合作,以确定盐丘、悬突、脊状构造和间歇性盐运动的起源。
Internally, salt stocks consist of isoclinal, attenuated, vertically plunging, refolded, and faulted folds resembling those in a handkerchief drawn vertically from the center through a small ring. Folding is by flowage, not flexural bending; folds are correspondingly complex and attenuated, but uniaxial. Interbedded detrital sediments and nonhalite salts may have been eliminated during movement. Strain hardening of halite crystals as well as differential sedimentation rates may have caused movements to be intermittent in space as well as in time, and strongly affected internal structures. External structures, such as grabens and faults, may be related to internal structures, such as faults, shears, and zones of differential movement. Cooperation is needed between petroleu geologists and salt-fabric geologists to determine the origin of salt massifs, overhangs, spines, and intermittent salt movements.