12 March 2013
Credo Resources Limited (Credo, the Company) is pleased to provide an update on exploration activities in Burkina Faso.
Tanyoko Air Core Drilling
The Company has completed a 2,941m air core drilling program on the Sartenga Trend at the Tanyoko Prospect located in the southwest of its Tyegana 1 permit.
The drill programme tested two 30 ppb gold anomalies identified from the Company's soil sampling program in late 2012. Base metal results of the soil sampling were received late December, 2012, and also confirm coincident anomalism in Ag, Ba, Cu, Pb, Zn and Te along the Sartenga Trend.
The Tanyoko Prospect is coincident with a regional magnetic high on the Sartenga Trend, and is immediately along strike, to the north east of the Sartenga copper-gold discovery, recently made by West Africa Resources (ASX: WAF). The second parallel gold anomaly (Tanyoko North) is located approximately 1km to the north-west.
Figure 1 illustrates the two, gold in soil anomalies superimposed on the regional magnetics. The image also shows the gold geochemistry reported by West African Resources from its Sartenga project and announced on 26 July 2011.
Figure 1: Tyegana 1 Permit Tanyoko soil anomalies
A total of 64 aircore drill holes, for 2,941 m, were drilled by African Mining Services. The drill holes were drilled north at -60 degrees, except for TYAC022 which was drilled south due to drill pad access. The collars are located on a wide spaced, 400 m East by 200 m North grid covering the 30 ppb gold anomaly with closer spaced drilling on a 200 m East by 100 m North grid in the vicinity of the artisanal workings in the centre of the 30 ppb gold anomaly.
Each drill hole was drilled to aircore refusal, with depths ranging between 17 m in fresher diorites to 80 m in strongly, oxidised sediments. Four metre composite samples were collected, and submitted with standards, blanks and duplicate QAQC samples to ALS Global laboratories in Ouagadougou for Au fire assay. All drill hole samples were tested onsite using an Innovex handheld XRF analyser for base metals.
The drilling encountered a complex of volcanogenic sediments, minor shale and mafic schists which have been intruded by porphyritic diorite, granodiorites and granites. Logging identified silica and sericite alteration associated with the main diorite body, located coincident with the regional magnetic high and on the Sartenga Trend. Some significant quartz veining and silicification has also been logged in sediments proximal to contacts with the main diorite body.
Au assaying has identified low level mineralisation associated with shearing and quartz veining, in the main diorite body and in the sediments proximal to the diorite contacts. No significant Au mineralisation was encountered on the Tanyoko North trend.
XRF analysis confirms continuation of copper anomalism along the Sartenga Trend, along strike from the Sartenga copper-gold discovery, reported by West African Resources. The copper is located along the sheared granite ¡V sediment contact. Selected lines of drilling have been submitted for base metal assaying (results pending) to test low level copper anomalism (XRF, values ranging 100 ¡V 1000 ppm) along the Sartenga Trend near the southern permit boundary.
The Company continues to evaluate the results of the drilling. A summary of the drilling is presented in Figure 2, and all drill results are presented in Table 1.
Figure 2: Tyegana 1 Aircore Drill Plan and Interpreted Geology
Table1 Complete Drilling Results
For more information, please visit http://doc.irasia.com/listco/au/crq/press/p130312.pdf.
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