It presents alternating upraised (from Nd2 to Nd3 and at Nd5) and downthrown
(centred at Nd4) blocks.
traps of the NW Witch Ground Graben, UK North Sea," Journal of Petroleum Geology, vol.
It appears as a splay of the major Kalabagh Fault (Fig.3) and along this fault, the eastern flank of the Ziarat Pir Syncline is downthrown
to the west.
block of the fault records the transition from distal alluvial fan facies to the fluvial-palustrine environment of the Guadalentin Depression reaching up to Holocene times.
The wells in this field are located on the downthrown
block of the major fault M2 (Figures 8(a) and 8(b)), in the rollover anticlines formed against the fault.
Khaskeli and Downthrown
From the model the mineralisation is seen to pinch and swell, and to be uplifted or downthrown
laterally between holes, This is due to local faulting and folding which is evident at the surface in outcrops and trenches.
The Ikihoyuk structure is one of 17 mapped on 2007 3D seismic and is a downthrown
fault trap with a structural closure of about 1.7 sq km.
They frequently have a "roll-over" anticline with four-way closure on the downthrown
side of the fault and antithetic faulting in the downthrown
On the fault's downthrown
wing local tectonic depression named Roztoki-Mokrzeszow graben, characterised by 350 m thick Tertiary formations, was discovered (Dyjor 1983, Dyjor and Kuszell 1977).