Continental, Sabkha and Shallow Open Marine Liassic-Triassic Sequence Offers New Exploration Plays in Malta

Debono, Godwin; Xerri, S.; Bishop, William F.

doi:10.3997/2214-4609.201406016

Cited by 2 publications

(2 citation statements)

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“…In contrast, the reported evaporitic units are very deep or have a limited thickness. The Late Triassic anhydrite beds recorded in Madonna Taz-Zejt 1ST1 borehole have a cumulative thickness of around 230 m, but occur below 4.5 km depth (Debono et al 2000). The relative shallow gypsum bed found 100-150 m below the base of the Lower Coralline Limestone in the Malta Platform is just 1 m thick (Gatt & Gluyas 2012).…”

Section: Soluble Rocks In the Subsurfacementioning

confidence: 97%

“…The Madonna Taz-Zejt 1ST1 borehole, drilled on land in western Gozo ( Fig. 1), proved a 3200 m thick Late Triassic succession from a depth of 4.5 km, consisting of dolomites, shales and metres-thick anhydrite beds, the last with an aggregate thickness of c. 230 m (Debono et al 2000). In Zabbar and Aqualta boreholes, drilled in the Malta Platform (Fig.…”

Section: Geological Settingmentioning

confidence: 98%

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New insights into the genesis of the Miocene collapse structures of the island of Gozo (Malta, central Mediterranean Sea)

Arnedo

Tonelli

Gutiérrez

et al. 2015

JGS

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The large palaeosinkholes located in the NW of Gozo (central Mediterranean Sea, Malta) offer excellent exposures that provide information on the geometry and kinematics of large karst-related collapse structures. Detailed geological analysis of these peculiar palaeosinkholes indicates that deep-seated evaporite dissolution is the most feasible hypothesis to explain their formation, according to the following evidence. (1) Several structures have been formed by progressive foundering of cylindrical blocks with limited internal deformation as revealed by the synsedimentary subsidence recorded by their Miocene sedimentary fill. This subsidence mechanism is more compatible with interstratal dissolution of evaporites than karstification and cave development in limestone formations. (2) The dimensions and deformation style of the palaeosinkholes are similar to those of other collapse structures related to deep-seated dissolution of salt-bearing evaporites. (3) The arcuate monocline associated with some of these collapse structures is also a characteristic feature of subsidence related to dissolution of evaporites.\ud However, no major evaporite formations have been documented so far in the subsurface of the Malta Platform

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Section: Soluble Rocks In the Subsurfacementioning

confidence: 97%

Section: Geological Settingmentioning

confidence: 98%