plunging fold

plunging fold

[′plənj·iŋ ′fōld]
(geology)
A fold having a relatively steep plunge. Also known as pitching fold.
References in periodicals archive ?
In 2007, a suite of twenty three rock chip samples (CKR001 - CKR023) collected from surface at the south-eastern end of Cockatoo Island were submitted to Ammtec Ltd in Perth to test outcropping iron mineralisation within the keel of a plunging fold nose in the central part of the island as potential feed source for a WHIMS beneficiation project.
Significantly, the apparent south to southwest plunging fold closure coincides with the general locus of known gold mineralization.
Current drilling at Mad Kiss is now focused from following the north limb of the anticline to probing the down-dip continuity of the steeply plunging fold nose.
Drill cross sections show that the mineralization thickens and gold tenure increases toward the core of a shallow dipping, south plunging fold structure where sulphidization, silicification, and shearing are most Intense.
The greatest concentration of gold is in a shallow plunging fold hinge of iron formation.
Based on the mapping and geophysical results it was interpreted that the Alpha Zone mineralization is associated with an easterly plunging fold structure, and remains open to the east.
The model assumes that folding is the primary control of the sulfide mineralization, which follows the plunging fold axis to depth.
These results, combined with historic drilling in the area, suggest potential for a southeast plunging fold closure of enriched grade that could make an attractive underground exploration target going forward.
Surface mapping and deep drilling in 2003 has led to a re-interpretation of the geology in the Boston area, defining a near vertical overturned fold with a steep south plunging fold axis.
Mineralization at Lufua is hosted predominantly within altered and veined Katangan metapelites, overlying largely unaltered and unmineralized conglomeratic schist, and is believed to be contained within a shallow south eastwardly plunging fold.
1] are generally tight to isoclinal, NNE-trending, WNW-verging, shallowly plunging folds (Fig.
Comparison of attitudes of axial planes (009[degrees], 75[degrees]/099[degrees]) and [beta]-axis (5[degrees]/011[degrees]) of the regional fold with that of the NE /SW plunging folds (A/P: 014[degrees], 72[degrees]/104[degrees] and mean [beta]-axis 4[degrees]/015[degrees]) show that they are fairly compatible, which implies that the NE/SW plunging minor folds are coaxial with the regional fold(s).