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FIELD TRIP IN CÔTE D'IVOIRE (3rd IGCP638 meeting, Oct. 15-20th, 2018)

The post-conference field trip will be held in the southwest of Côte d'Ivoire from 17 to 20 October 2018 as follows:

4 days field trip along with a transect on the Precambrian Formations, in the area of San Pedro, southwest Côte d'Ivoire, and several visits of mineralized outcrops and mines.

The main aim is to allow the particpants with some specialists of this area (Man-Leo rise) part of the West African Craton (WAC):

- discover a wide variety of geological facies of the Birimian Formations and the transition of the Archean Formations as well, 

- examine and discuss together some key outcrops for the understanding the lithology and the geodynamics in relationship with mineralizations,

- visit an operating mine within the sector, probably gold mine of Angovia (Perseus) in the Yaouré at 25 km west of Yamoussoukro or gold mine ofAgbaou (Endeavour)

Location Fig.1 Fig.2 Fig.3

Main Resources

Mineral Industry (2011, 2012) Rough Diamond (2013) Petroleum Systems (2006)

Gold Resources: RedRock IronRidge Taruga

 

newNoter que le programme de l'excursion de terrain a été modifié pour la raison suivante:

L'excursion géologique est réduite d'une journée car nous n'irons pas à San-Pédro dans le Sud-Ouest. Le voyage est assez long et nous aurons juste une journée d'observation des sites, ce qui est court. De plus, les accès aux principaux affleurements (notamment Monogaga) sont difficiles (pistes non entretenues). Le lendemain (dimanche) nous aurons une journée entière de voyage (10 à 11 heures de route). En résumé, le voyage à San-Pédro est assez long pour seulement une journée de travail; ce qui n'est pas très rentable. Il est donc annulé...

As the geological field trip will take place in the volcanosedimentary trough of Fêtèkro, to ~200 km of Abidjan, instead of San Pedro, we will also visit either one of the goldmines (Agbaou, Endeavour) of this trough, or a mine located at ~50 km NW in the Yaouré unit, the mine of Angovia (Perseus).

newNote that the field trip programme has been modified for the following reason:

The geological field trip is reduced one day because we will not go to San-Pédro, southwestwards. The travel is rather long and we will have just one day observation of sites, which is short. Moreover, accesses to the main outcrops (in particular Monogaga) are difficult (tracks not maintained). The next day (sunday) we will have a full day  travel (10 to 11 hours drive). In summary, the travel to San-Pédro is long enough for only one work day; which is not very profitable. It is thus canceled...

Comme l'excursion géologique se déroulera dans le sillon volcanosédimentaire de Fêtèkro, à ~200 km d'Abidjan, à la place de San Pedro, nous visiterons aussi soit l'une des mines d'or (Agbaou, Endeavour) de ce sillon; soit une mine située à ~50 km au nord-ouest dans l'unité du Yaouré, la mine d'Angovia (Perseus).

Details of the field trip programme

Wednesday October 17th, 2018

7h00: field trip departure (breakfast at 7h30)

8h30: major unconformity of the Paleozoic basin on Birimian Formations

9h30: granites (Birimian) in the Comoé Basin (#Hydroelectric dam of Taabo#)?

11h30: beginning of the Anikro cross-section with the pillow lavas

13h00: volcanic ashes (cinerites)

13h30-14h00: lunch break in the field

14h30: the gabbros and country rocks (schists)

15h15: Yamoussoukro with the visit of the Basilica until 16h30

16h45: refreshment break

17h15: stay at a hotel

19h00: dinner

Départ pour le terrain à 7h00 (petit déjeuner à 7h30), discordance majeure du bassin paléozoïque sur le Birimien à 08h30, granites (Birimien) dans le bassin de la Comoé à 9h30, (#Barrage hydroélectrique de Taabo#) ? Début de la coupe d’Anikro avec les pillow lava à 11h30, les cinérites à 13h00, déjeuner sur le terrain de 13h30 à 14h00, les gabbros et schistes encaissants à 14h30, Yamoussoukro à 15h15 avec la visite de la Basilique jusqu’à 16h30, pause rafraichissement à 16h45, hôtel à 17h15 et déjeuner à 19h00.

Thursday October 18th,  2018

8h00: field trip departure

8h30-13h00: continuing the exploration of the Anikro cross-section with details on the basin, the ignimbrites and the periclinal termination

13h00-13h30: lunch break in the field

14h30-16h30: visit of the Mine of Angovia

17h00: back to Yamoussoukro

Départ pour le terrain à 8h00 pour finir la coupe d’Anikro avec les détails sur le bassin, les ignimbrites et la terminaison périclinale jusqu’à 13h00, déjeuner sur le terrain de 13h00 à 13h30, visite de la Mine d’Angovia de 14h30 à 16h30, retour à Yamoussoukro à 17h00.

Friday October 19th, 2018

8h00: departure from Yamoussoukro to San-Pedro

13h00: stop at Soubré to visit the hydroelectric dam

17h30: arrival at San-Pedro

Départ de Yamoussoukro à 8h00 pour San-Pedro, arrêt à Soubré pour voir le barrage hydroélectrique (vers 13h), arrivée à San-Pedro à 17h30.

Saturday October 20th, 2018

8h00: departure to Monogaga and Kounoukou

17h30: back to San-Pedro

Départ à 8h00 pour Monogaga et Kounoukou, retour à San-Pedro à 17h30.

Sunday October 21st, 2018

8h00: departure to Bay of the Sirens (Large-Béréby), with a stop at Adjaméné. The main outcrops of Gbowé and Bay of the Sirens will be visited and possible discussions with participants on the local geology and global geology.

10h30: arrival at Bay of the Sirens

13h30-14h00: departure from Bay of the Sirens

15h30: arrival at San-Pedro

17h00: departure to Abidjan

Départ à 8h00 pour la Baie des Sirènes (Grand-Béréby), arrivée à 10h30. Avant la Baie des Sirènes, on fera un arrêt à Adjaméné. Tous les affleurements de Gbowé et de la Baie des Sirènes seront observés. Départ de la Baie des Sirènes entre 13h30 et 14h00. Arrivée à San-Pedro à 15h30 et départ pour Abidjan à 17h.


The program of the field trip could undergo modifications according to the difficulties of access of certain sites, of which Monogaga for example.

Le programme de l’excursion pourrait subir des modifications en fonction des difficultés d’accès de certains sites, dont Monogaga par exemple.

Field guide-booklet

The guide-booklet in general presents the geology of the Ivory Coast and a more detailed way the sites of observation of the geological field trip. The two areas to be described in detail are the Fetékro through and the SASCA (south-west of the Ivory Coast) domain.
We propose to write the guide-booklet in English and in French.

Notice that the field guidebook will be delivered to only participants of the field trip. The sampling of rocks is authorized.

Livret guide de terrain

Le livret guide présente en général la géologie de la Côte d’Ivoire et de façon plus détaillée les sites d’observation de l’excursion géologique. Les deux régions à décrire en détail sont le sillon de Fetékro et le domaine SASCA (Sud-Ouest de la Côte d’Ivoire).

Nous proposons d’écrire le guide de terrain en anglais et en Français.

Notez que le livret-guide sera distribué seulement aux participants de l'excursion sur le terrain. L'échantillonnage des roches est autorisé.

Coordinators: Dr. A. Kouamelan, Pr. Y. Coulibaly

 

Participants Fees ( / FCFA)
Remarks

Academic   

  Student         

 Professional

225 / 150 000

115 / 75 000

450 / 300 000

The number of places is limited to 30.

Participation is on a first come, first served.

1 ~ 655.957 FCFA

 

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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.