Aqueous and hydrocarbon inclusions in dolomite fromTouissit-Bou Beker district, Eastern Morocco: a Jurassic carbonate hosted PbZn (Cu) deposit

Makhoukhi, Samira; Marignac, C.; Pironon, Jacques; Marrakchi, C.; Bouabdelli, Mohamed; Bastoul, Abdelmajid

doi:10.1016/s0375-6742(03)00098-0

Cited by 19 publications

(19 citation statements)

References 4 publications

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“…The geology of the Touissit-Bou Beker district has been well described by numerous investigations (Voirin 1965;Samson 1973;Touahri 1991;Rajlich 1983;Dupuy and Touray;Makhoukhi 1993;Bouabdellah 1994;Torbi and Gélard 1994;Ajaji et al 1998;Aboutahir 1999;Bouabdellah et al 1996aBouabdellah et al , b, 1999Bouabdellah et al , 2001Bouabdellah et al , 2012Bouabdellah et al , 2015. Only a summary of the main conclusions relevant to the present study are given below.…”

Section: Geological Settingsupporting

confidence: 56%

“…Calculated ore fluid pressures in the range of 150-200 bars (Makhoukhi et al 2003) suggest depths of less than 1 km for ore deposition.…”

Section: Fluid Inclusion Thermometrymentioning

confidence: 97%

“…Microthermometric data performed on several generations of sphalerite and dolomite that span the paragenetic sequence (Dupy and Touray 1986;Makhoukhi et al 2003;Aboutahir 1999;Bouabdellah et al 2012) indicate that the ore-forming fluids correspond to evolved H 2 ONaCl-CaCl 2 -KCl-MgCl 2 ± hydrocarbons hot (100 ± 20°C) saline brines (>20 wt% NaCl equiv) of basin derivation. Calculated ore fluid pressures in the range of 150-200 bars (Makhoukhi et al 2003) suggest depths of less than 1 km for ore deposition.…”

Section: Fluid Inclusion Thermometrymentioning

confidence: 99%

“…However, in spite of abundant available geological, mineralogical, and geochemical data (Rajlich 1983;Dupuy and Touray 1986;Makhoukhi 1993;Bouabdellah 1994;Bouabdellah et al 2012Bouabdellah et al , 2015, the basic questions of genesis remain controversial with proposed models ranging from syngenetic to epigenetic. The lack of minerals suitable for radiometric age dating, together with the omnipresence of post-ore oxidizing events, have left the age of Pb-Zn mineralization as the subject of ongoing debate, and therefore any robust genetic model open to controversy.…”

Section: Introductionmentioning

confidence: 99%

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Geology, Geochemistry, and Current Genetic Models for Major Mississippi Valley-Type Pb–Zn Deposits of Morocco

Bouabdellah¹,

Sangster²

2016

Mineral Resource Reviews

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Morocco has been for the past two centuries one of the top ten Pb-Zn producers with two thirds of base-metal production derived from three major Mississippi Valley-type districts (Touissit-Bou Beker, Upper Moulouya, and Jbel Bou Dahar). Collectively, these districts have produced more than 100 Mt of ore at an average grade of *3 wt% Zn and 4 wt% Pb. At the present time, none of the three districts is active. favorable fluid channels for metal-bearing brines into permeable host rocks and dissolution structures. The geometry of the orebodies that parallel the major alpine faults, coupled with lead isotopic constraints, suggest that the MVT mineralizing event occurred during midle Tertiary time (i.e., Cretaceous to Miocene) coincident with closing stages of the Alpine orogeny in the Atlasic orogenic belt. Alpine mineralization is thought to have been promoted by the mixing of older, high-temperature, rock-buffered, dense brines stored within the Paleozoic basement, and a downwelling, cooler fluid probably of meteoric origin. The resulting mixed brines were centered mainly on the basement high structure and its flanks, then flowed laterally away from the basement high and giving rise to the lower grade mineralization of the distal prospects. Fluid migration towards the ore districts could have been achieved either by a gravity-driven system (Touissit-Bou Beker, Mibladen, and Jbel Bou Dahar) or sediment compaction in the foredeep (Jbel Bou Dahar), or a combination of both. An alternative buoyancy-driven fluid convection model is proposed for the Touissit-Bou Beker MVT mineralization.

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Section: Geological Settingsupporting

confidence: 56%

“…Calculated ore fluid pressures in the range of 150-200 bars (Makhoukhi et al 2003) suggest depths of less than 1 km for ore deposition.…”

Section: Fluid Inclusion Thermometrymentioning

confidence: 97%

Section: Fluid Inclusion Thermometrymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Geology, Geochemistry, and Current Genetic Models for Major Mississippi Valley-Type Pb–Zn Deposits of Morocco

Bouabdellah¹,

Sangster²

2016

Mineral Resource Reviews

View full text Add to dashboard Cite

show abstract

“…H 2 S, COS, SO 2 , CO, H 2 , NH 3 and O 2 have also been detected in appreciable amounts in some fluids (Bény et al, 1982;Ferrando et al, 2010;Frezzotti et al, 2002;Giuliani et al, 2003;Grishina et al, 1992;Peretti et al, 1992;Siemann and Ellendorff, 2001;Tsunogae and Dubessy, 2009). Identification of hydrocarbons heavier than CH 4 is also possible (e.g., Guilhaumou, 1982;Hrstka et al 2011;Makhoukhi et al, 2003;Munz, 2001;Orange et al, 1996;Pironon, 1993;Pironon and Barrès, 1990;Potter et al, 2004;Rossetti and Tecce, 2008;Schubert et al, 2007;Wesełucha-Birczyńska et al, 2010), although fluorescence often does not allow conventional analysis (see e.g., Pironon et al, 1998).…”

Section: Gaseous Fluidsmentioning

confidence: 99%