Oct 7 2010
Seafield Resources Ltd. (TSX VENTURE:SFF) ("Seafield" or, the "Company") is pleased to report the results of a soil geochemical survey in the Dosquebradas area of the Company's 6,757 hectare Quinchia gold project in the Department of Risaralda, Colombia.
The highlights include:
The Company's Quinchia project contains several gold-bearing porphyry deposits and breccias. It is located in the Middle Cauca gold belt between the 12.9 million ounce La Colosa gold deposit of AngloGold Ashanti and the 9.7 million ounce Marmato gold deposit of Medoro Resources Ltd.
Seafield undertook a detailed soil geochemical program over an area of approximately 3.6 km by 2.0 km and collected 1,129 samples at 50 m intervals on a NE trending grid with line spacing of 100 m. Gold values in soils ranged from below detection up to a high of 4.73 g/t Au. The soil survey was laid out to cover an area of several aeromagnetic high anomalies, which are interpreted as possible porphyry targets. Since magnetite alteration and veining is an important feature of gold porphyries in the Quinchia project, magnetic surveys are a key to discovering hidden porphyries in an area of very little outcrop.
The principal new soil anomaly is called Santa Sofia and is located one km to the northeast of the Dosquebradas porphyry. The Santa Sofia soil anomaly extends over an area of about 1,050 meters by 850 meters as defined by soil samples above 50 ppb Au (0.05 g/t Au), with maximum values of 1.3 and 2.3 g/t Au, and overlaps the northern half of a strong aeromagnetic high anomaly. The gold anomaly is associated with a copper anomaly, defined by values above 250 ppm and up to 820 ppm Cu, and a weak molybdenum anomaly with values up to 23 ppm Mo, which confirm porphyry-type characteristics of the target zone.
A second gold in soil anomaly defines the northern extension of the Dosquebradas porphyry on Seafield's property and has an area of about 700 meters by 550 meters as defined by soil samples above 50 ppb Au (0.05 g/t Au). Values in soils are as high as 0.58 g/t Au. The soil anomaly is in an aeromagnetic low, which may be related to phyllic alteration associated with the mineralizing event. The gold anomaly is associated with a copper anomaly, defined by values above 250 ppm and up to 620 ppm Cu, and a stronger molybdenum anomaly than the Santa Sofia zone, with anomalous values between 5 and 96 ppm Mo. These confirm that the zone has porphyry-type characteristics. In addition, two holes drilled by AngloGold Ashanti, a previous operator, in the portion of the Dosquebradas porphyry that lies on the Seafield property, returned grades of 0.62 g/t Au over 68 m and 0.90 g/t Au over 36 m in DQ-DD-2, and 0.63 g/t Au over 90.0 m and 1.67 g/t Au over 39.5 m in DQ-DD-3.
A third soil anomaly with values up to 4.7 g/t Au was identified at the La Loma zone, 1.2 km east of Santa Sofia, and is open. The soil sample grid is being extended to define the extent of this anomaly.
In addition, elsewhere on the grid, there are also a number of smaller gold-in-soil anomalies with values up to 0.68 g/t Au which require follow up.
Tony Roodenburg, CEO of Seafield, stated: "These impressive gold-in-soil anomalies present significant new targets for Seafield in the district. The soil anomaly at Santa Sofia is at least twice the size of the Miraflores breccia pipe, which we are currently drilling. Our field crew is currently following up on all of these anomalous areas, prior to drill testing these targets."
Elsewhere on the Quinchia project, Seafield is continuing to drill at the Miraflores breccia pipe, located about 3 km to the southeast of the Dosquebradas porphyry, and has completed 6 out of 11 planned holes. Assay results are awaited. The Miraflores deposit has an inferred mineral resource of 776,000 ounces of gold contained in 18.65 million tonnes at 1.3 g/t Au grade at a cut-off grade of 0.5 g/t (see press release of April 20, 2010).
Stewart D. Redwood, Consulting Geologist to Seafield, is a qualified person as defined by National Instrument 43-101 and prepared or reviewed the preparation of the scientific and technical information in this press release in respect of the geochemistry results from the Quinchia Project. Dr. Redwood is a Fellow of the Institute of Materials, Minerals and Mining (Number 47017), a professional association and designation recognized by the Canadian regulatory authorities. Dr. Redwood verified the data disclosed in this release, including the sampling, analytical and test data underlying the information contained in this release. Verification included a review and validation of the applicable assay databases and reviews of assay certificates.
Sample Collection, Preparation, Analyses and QA-QC
The soil samples were taken by manual post-hole digger from the top of the C horizon or lower part of the B horizon at a depth of 0.75 to 1.00 m. The samples were not sieved in the field. Soil samples were prepared by SGS in Medellin and analyzed by SGS in Lima, Peru. Soil samples were sieved to minus 80 mesh and pulverized to 95% passing minus 140 mesh. Gold was analyzed by fire assay on a 30 gram sample with atomic adsorption (AAS) finish, and over-limit samples above 5000 ppb (5.0 g/t) were repeated by fire assay on a 30 gram sample with gravimetric finish. A suite of 50 elements was analyzed by multi-acid digestion (hydrochloric plus nitric plus perchloric plus hydrofluoric acids) of a 2.0 gram sample aliquot with inductively coupled plasma emission mass spectrometry (ICP-MS) finish. Standard, blank and duplicate samples were routinely inserted for quality assurance and quality control.
Source: Seafield Resources Ltd.