Difference between revisions of "Structural styles: data and techniques for evaluation"
Cwhitehurst (talk | contribs) |
Cwhitehurst (talk | contribs) |
||
Line 20: | Line 20: | ||
==Choosing techniques== | ==Choosing techniques== | ||
− | [[file:Exploring-for-structural-traps fig20-4.png|thumb| | + | [[file:Exploring-for-structural-traps fig20-4.png|thumb|500px|Figure 1]] |
If and when one or more structural styles are ascribed to an area, certain of the structural techniques become more important to perform than others. The list below displays those techniques (keyed to the numbers in [[:file:Exploring-for-structural-traps fig20-4.png|Figure 1]]. | If and when one or more structural styles are ascribed to an area, certain of the structural techniques become more important to perform than others. The list below displays those techniques (keyed to the numbers in [[:file:Exploring-for-structural-traps fig20-4.png|Figure 1]]. | ||
Line 26: | Line 26: | ||
{| class = "wikitable" | {| class = "wikitable" | ||
|- | |- | ||
− | ! Style | + | ! Style || Very Important* |
− | |||
|- | |- | ||
− | | [[Thrust belt]]s | + | | [[Thrust belt]]s || 5, 8, 10, 12 |
− | | 5, 8, 10, 12 | ||
|- | |- | ||
− | | [[Wrench system]]s | + | | [[Wrench system]]s || 1, 3, 11 |
− | | 1, 3, 11 | ||
|- | |- | ||
− | | [[Rift]]s and [[detached normal fault]] systems | + | | [[Rift]]s and [[detached normal fault]] systems || 2, 8, 10, 12, 15 |
− | | 2, 8, 10, 12, 15 | ||
|- | |- | ||
− | | [[Diapir]]ic | + | | [[Diapir]]ic || 2, 12 |
− | | 2, 12 | ||
|- | |- | ||
− | | [[Foreland block fold]]s | + | | [[Foreland block fold]]s || 3, 6, 8 |
− | | 3, 6, 8 | ||
|- | |- | ||
− | | [[Basement]] warps and sags | + | | [[Basement]] warps and sags || 2, 6, 8, 11 |
− | | 2, 6, 8, 11 | ||
|} | |} | ||
Revision as of 21:29, 2 July 2014
Exploring for Oil and Gas Traps | |
Series | Treatise in Petroleum Geology |
---|---|
Part | Predicting the occurrence of oil and gas traps |
Chapter | Exploring for structural traps |
Author | R.A. Nelson, T.L. Patton, S. Serra |
Link | Web page |
Store | AAPG Store |
What is a structural style?
Structural styles or structural families are associations of structures that often occur together due to a common origin. For example, major foreland thrust belts usually contain a mixture of listric reverse or decollement thrust faults, large asymmetric hanging wall folds, and late listric normal faults. These features are arranged to form an overall arcuate deformed belt. There is little or no involvement of mechanical basement in the deformation. Individual structures generally have good strike continuity and poor depth or dip continuity. Hence, in any newly discovered thrust belt, these same associations (thrust belt structural style) would be anticipated, modified somewhat by local geology. The concept of structural styles and their classification are given in Harding and Lowell[1] and Lowell.[2]
Choosing techniques
If and when one or more structural styles are ascribed to an area, certain of the structural techniques become more important to perform than others. The list below displays those techniques (keyed to the numbers in Figure 1.
Style | Very Important* |
---|---|
Thrust belts | 5, 8, 10, 12 |
Wrench systems | 1, 3, 11 |
Rifts and detached normal fault systems | 2, 8, 10, 12, 15 |
Diapiric | 2, 12 |
Foreland block folds | 3, 6, 8 |
Basement warps and sags | 2, 6, 8, 11 |