10/24/2022 0 Comments Timeslice seismic consultantsSince these two processes can result in a significantly different size to a salt anomaly, encountering one or the other type can have a significant effect on the economics of the ore body. This paper proposes that salt anomalies formed because of two processes, early compaction of carbonate shoals of the Winnipegosis Formation and tectonics that resulted in multiple stages of block movement during the deposition of the upper Prairie Evaporite. An explanation of the underlying controls on the formation of these salt anomalies has been somewhat elusive although the overwhelming assumption remains that these features developed in lows on a salina. TIMESLICE SEISMIC CONSULTANTS SERIESAlthough the geology of the Esterhazy Member ore body is largely considered a regional flat lying continuous series of thin potash hosting beds, there are numerous occurrences where the ore has been either replaced or removed leaving behind uneconomical halite-rich sections. The Esterhazy Member of the western Canada Prairie Evaporite has been mined underground for sylvite (KCl) since the early 1960s. D) Time slice through AB and OR, showing curvilinear geometry to OR. C) Seismic profile highlighting an oblique reflection (OR red dotted line) that extends from TS to ABT. B) Seismic profile of lateral margin of AB showing pinch out (PO) of ABT with its basal surface at TS and onlap onto ABT. TWT-two-way traveltime Amp.-amplitude V.E.-vertical exaggeration. Sf-seafloor P-R-Pliocene–recent ABT-AB top surface PS-pre-salt PO-pinch-out IL-interdigitating lenses. Base of AB and base salt (BS) connect locally, forming a weld. A) Seismic profile through AB, which directly overlies top salt (TS) of Messinian evaporites (ME). 1A for seismic profile and time-slice locations). Seismic character of allochthonous body (AB) (see Fig. 1A for location), with location of Kg45 well, margin of seismic survey (green outline), and welds between the AB and pre-salt units. Sf-seafloor ABT-allochthonous body top Tort.-Tortonian Amp.-amplitude. The TD (total depth) of the well is within the allochthonous body (AB), which directly overlies Messinian evaporites (Mess. Sf-seafloor ABT-allochthonous body top TS-top salt BS-base salt. B) Schematic cross-section Nile Delta and seismic study area, in which Messinian evaporites are overlain by allochthonous Tortonian shale. Highlighted are margins of salt (light blue line) and three-dimensional (3-D) seismic survey area (green outline). Link to articleĪ) Location of seismic area and exploration wells (Kg45, La52) used for calibration. We propose that mud extrusions that coalesce on a surface forming a multi-conduit-fed edifice be referred to as mud canopies, by analogy with salt canopies, with implications for basin reconstruction, paleo–overpressure release events, and fluid migration. We argue that this large mud body represents a new morphological type and scale of mud extrusion. These large extrusive flows coalesced to form a single edifice with an exceptional volume of ∼292 km3 that is connected to eight widely spaced conduits. The allochthonous material was sourced from beneath the ∼1-km-thick Messinian evaporites in the Eastern Mediterranean and extruded synchronously as eight large mud volcanoes directly on top of the Messinian evaporites in a catastrophic remobilization event at the end of the Messinian salinity crisis. Three-dimensional seismic imaging and well calibration reveal a large allochthonous mud edifice that is composed of several mud extrusions and covers an area >740 km2 on the outer shelf slope of the Nile Delta. The genesis of a giant mud canopy by catastrophic failure of a thick evaporite sealing layer
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