FIELD TRIP IN MOROCCO (2nd IGCP638 meeting, Nov. 7-12th, 2017)

Coordinators: Pr. Omar Saddiqui, Pr. Lahssen Baidder, Pr. Hassan Ouanaimi

The post-conference field trip will be held in the south of Morocco from 9 to 12 November 2017. as follows:

4 days field trip along with a transect on the Anti-Atlas Paleoproterozoic Formations, with a possible quick cross along the High-Atlas, and several visits of mineralized outcrops and mines.

Participants Fees () Remarks

Academic   

Student         

Professional

300

150

600

The number of places is limited to 20.

Participation is on a first come, first served.

Post Congress FIELD TRIP

November 9-12, 2017

guided by

O. Saddiqi, L. Baidder (University Hassan II of Casablanca), H. Ouanaimi (University of Marrakech)

 Summary: South of Morocco is one of the most attractive tourist areas with diversified landscapes of mountains covered with snow towards the desert plains. The High-Atlas with its 3000 to 4000 meters constitutes a major climatic barrier with the disturbances of the Atlantic, which represent the arid climate of the sub-Saharan field of the Anti-Atlas in the south of the chain. These areas are occupied by Berber populations which have a long tradition of hospitality. The route of the excursion follows most tourist roads marked by exceptional outcrops illustrating a transect through the High-Atlas and the central Anti-Atlas mountain ranges (Figure 1), which corresponds to the external domain of the Hercynian chain (Variscan, Alleghanian), and which also includes broad inliers dominated by Panafrican terranes. The High-Atlas was formed during the Cenozoic one to the detriment of an aborted Triassic-Jurassic fracture. Consequently, three superimposed wilsonian cycles can be illustrated during this field trip. The route will make it possible to illustrate the complex geological history of these zones. Our objective is to present and discuss the various regional characteristics and sets of themes (sedimentological, structural, magmatic, metamorphic, metallogenic,…), which allowed the recording of the principal geodynamic events during this long geological history. Splendid minerals (erhytrite, vanadinite,…) and fossils (trilobites, goniatites,…) can be bought at several places. During this excursion, the loop Ouarzazate - Bou Azzer - Tazenakht - Ouarzazate makes it possible to the participants to discover the Panafrican chain (domain of external platform, the ophiolitic suture zone of Bou Azzer, the early volcanoclastic cover sequence [late Neoproterozoic] and the folded Paleozoic sediments [Cambrian and Ordovician]). 

A detailed guide-booklet will be provided with GPS positioning of each stop. The sampling of rocks is authorized.

 

 Structural evolution of the High Atlas/Anti-Atlas Domains: An overview

Paleoproterozoic and Eburnean orogeny

Neoproterozoic and Pan-African orogeny

Paleozoic and Variscan orogeny

Mesozoic and the Central Atlantic opening

Cenozoic and Atlasic deformation

Itinerary and Stops

MoroccoMap

Day 1 (J1): Casablanca-Marrakech: The coastal block with the phosphates plateaus and Hercynian massifs of Rehamna and Jebilet. Visit of Guemassa polymetallic mine (MANAGEM Group)

Day 2 (J2): Marrakech-Ouarzazate via Tizi n’Tichka: The Marrakech High Atlas (Ouzellarh Block)

Stop J2.1: The North Sub-Atlasic zone at Aït Ourir; Triassic basalts Liassic-Turonian series

Stop J2.2: North Sub-Atlasic zone (continuation); the Cretaceous-Eocene sequence

Stop J2.3: Oued Rdat overall panorama; Triassic Oukaimeden sandstones

Stop J2.4: Tazlida Precambrian basement

Stop J2.5: “Ouarzazate 97 km”: Ordovician slump beds and Bou Ourhioul panorama

Stop J2.6: Agdal Tichka: Middle Cambrian unconformity upon Upper Neoproterozoic rhyolites

Stop J2.7: Tichka Pass panorama

Stop J2.8: Telouet crossroad; South Atlas Fault, Mesozoic-Cenozoic cover

Stop J2.9: Aguelmous-Agouim: the Tiourjdal basalt sequence

Stop J2.10: Imini fault-ramp fold, Cretaceous transgression and Mn mine       

Day 3 (J3): Ouarzazate-Tazenakht-Ouarzazate: Proterozoic basement and Paleozoic cover of the Central Anti-Atlas

Stop J3.1: Panorama High Atlas/Anti-Atlas; Late Proterozoic ignimbrite (Ouarzazate Group OG)

Stop J3.2: Contact Adoudounien/OG

Stop J3.3: Quartzites saghro Group (SG); Pan-African deformation

Stop J3.4: Zenaga Paleoproterozoic schists

Stop J3.5: Tazenakht 2 Ga old granite; OG/Eburnean unconformity

Stop J3.6: Transgression Adoudounian limestones/OG

Stop J3.7: Quartz-diorite SG west of Bou Azzer; Adoudounian unconformity

Stop J3.8: Bou Azzer ophiolite complex

Stop J3.9: Foum Zguid 200 Ma old dolerite mega-dyke

Stop J3.10: Bleida 580 Ma old granodiorite

Day 4 (J4): Ouarzazate-Demnate-Casablanca: High-Atlas crossing and its Precambrian basement

Stop J4.1: The road to the north offers a gorgeous panorama on the South Atlas Front

Stop J4.2: The Skoura inlier with post-Pan-African angular unconformity

Stop J4.3: Landscapes on the Mesozoic cover (CAMP basalts and Liassic carbonates). The Ait Tamlil village is built on allochthonous Devonian shales and limestones

Stop J4.4: A thick Visean turbiditic complex associated with the Devonian nappes

Stop J4.5: The folded/faulted Mesozoic cover offers a famous site with dinosaur foot prints

Stop J4.6: The Imi n'Ifri touristic waterfalls overhang the Demnat town.

Back way to Casablanca

MinesAnti Atlas

Location of the main ore deposits in the Anti-Atlas Belt. The calc-alkaline magmatism of the Ediacaran, late Pan-African metacratonic period was associated with large-scale base metal and gold mineralization. Metallogenic activity was greatest during the final extensional stage, at the Precambrian-Cambrian boundary. It is characterized by world-class precious metal deposits, base-metal porphyry and SEDEX-type occurrences (Gasquet et al., 2005).

Structural map and reliable U-Pb radiometric ages (new and previous) of the Neoproterozoic plutonic and volcanic rocks in the Anti-Atlas and a proposed timetable. Western Anti-Atlas data are from Hassenforder (1987), Aït Malek et al. (1998), Gasquet et al. (2001), Walsh et al. (2002); Central Anti-Atlas from Ducrot and Lancelot (1977), Leblanc and Lancelot (1980), Mifdal and Peucat (1985), Thomas et al. (2002), Samson et al. (2003), Inglis et al. (2004); Thomas et al. (2004); Eastern Anti-Atlas from Magaritz et al. (1991), Landing et al. (1998), Levresse (2001), Cheilletz et al. (2002). International stratigraphic ages (left, in red) are after Amthor et al. (2003) and Gradstein et al. (2004). In bold the three studied inliers (Gasquet et al., 2005).

Anti Atlas Mines

 The Moroccan Anti-Atlas showing the Proterozoic inliers with the numerous polymetallic ore deposits (As, Au, Ag, Co, Cu, Ni, Zn, Pb).

 Download the field trip programme: field trip

 Notice that the field guidebook will be delivered to only participants of the field trip.

 

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FIELD TRIP IN SENEGAL (1st IGCP638 meeting, Dec. 5-10th, 2016)

A guide booklet of the field trip area will be available with the route map and the main stops

Map of Senegal

FIELD TRIPS

The post-conference field trip (December 7-10th, 2016) will be held according to the program below:

(1) the Precambrian of the West African Craton of Kedougou, about 700 km from Dakar: Geological cross section from the Greenstone Belts of Mako to the Diale sedimentary basin (Paleoproterozoic/Neoproterozoic).

Tourism: Visits of the Dindefelo falls and the Niokolo Koba National Park

(2) Senegalo-mauritanian Basin : Tertiary and Quaternary volcanism of Dakar and Mbour

Tourism : Geotourism, geoparks and parks (Hann and/or Bandia)


List and route of field trips

Field trip Route Coordinators Fees ($ US) Remarks
Kedougou: Precambrian formations

Geo-cross section:

Niemenike - Mako -Bafoundou - Lame / Diale (Bandafassi-Ibele-Landiene)

Tourism : Dindefelo falls / Niokolo-Koba park

M. Gueye

M. Dabo

Academic    300

Student          50

Professional 600

The number of places is limited.

Participation is on a first come, first served.

Dakar: Tertiary-Quaternary Volcanism & Geosites Mamelles / Ouakam / Cap Manuel / Goree islands

Academic    150

Student          50

The number of places is limited.

Participation is on a first come, first served.

Mbour: Tertiary Volcanism & Geosites Popoguine cliff / Dayane pipe / Bandia park

Academic    150

Student          50

The number of places is limited.

Participation is on a first come, first served.

 

Field trip Programme to Kédougou

7 Décembre 2016

  6h : Départ de Dakar

12h : Arrivée à Kaolack (Pause déjeuner de 30 mn)

18h : Arrivée à Kédougou (repas et nuitée hôtel)

8 Décembre 2016

6h30 : Départ de Kédougou

    7h : Arrivée à Mako

Station 1 : Basaltes en pillow-lavas de Badian (7h-8h30)

Station 2 : UB Manssarintana, andésite, dolérite, tufs andésitiques, tufs rhyolitiques (8h30-11h30)

Station 3 : Carrière de basaltes de Mako (12h -13h)

              - Pause déjeuner (13-14h30)

Station 4 : Granodiorite, gabbro et shear zone de Andar (14h30-16h)

Station 5 : Granodiorite bananeraie, granite et rhyolite de Niéméniké (16h-17h)

Station 6 : Mine de Torogold (17h-18h)

9 Décembre 2016

Départ 6h arrivée 7h

Station 7 : Contact Birimien Néoprotérozoïque à Landiéné (7h-9h)

Station 8 : Bandafassi- Calcaires à assises siliceux, et sills de dolérite du Paléozoïque dont le métamorphisme thermique occasionne la formation de scapolite sur le calcaire. Déformation : plissement disharmonique (10h-11h)

Station 9 : Schistes graphiteux de Débou-Inda, Déformation : shear zone et plissement (11h30)

Station 10 : Calcaire conglomératique d’Ibel, filons de dolérite et de lamprophyre du Paléozoïque, Déformation : Plissement dysharmonique, déformation des filons, cisaillement (12h-13h)

       - Pause déjeuner (13-14h30)

Station 11 : Visite des chutes de Dindéfelo (14h30-15h30)

17h: Retour à Kédougou et départ pour le parc.

10 Décembre 2016

  7h: Petit déjeuner et Début visite du Parc

12h: Fin visite et déjeuner

14h: Départ retour sur Dakar

23h: Arrivée à Dakar

fig1

Carte de localisation des sites à visiter durant l’excursion.

 fig2

Répartition des grandes séries du Birimien et des Mauritanides (d’après Bassot (1966), modifiée). (1) Supergroupe de Mako, (2) Supergroupe de Dialé-Daléma, (3) Batholite de Badon-Kakadian, (4) Batholite de Saraya, (5) Granitoïde de Gamaye, (6) Granitoïde de Boboti, (7) Granitoïde de type Diombaloye, (8) Granitoïde de type Bondoukou, (9) Série de Falémé, (10) Série de Ségou-Madina kouta, (11) Série de Younkounkou, (12) Série du Mali, (13) Granitoïde du Niokolo Koba, (14) Série de Bakel, (15) Zone de cisaillement. MTZ : Zone transcurente majeure ; SMF : Accident Sénégalo-Malien.

 fig3

Carte géologique de la boutonnière de Kédougou-Kéniéba (d’après Pons et al., 1992, modifiée par Dabo et al., 2015). Gm : Granite de Gamaye. MTZ : Zone transcurente majeure ; SMF : Accident Sénégalo-Malien. Encadrés : zones à visiter durant l’excursion.