Discovery At Erika Property

VANCOUVDR - Tarsis Resources Ltd. reported the discovery of a sediment-hosted gold system at its Erika property, Mexico. Drilling has encountered orpiment-realgar mineralization associated with zones of decarbonatized siltstone in 4 of 5 holes drilled across a 650 m transect comprising a transitional sequence of calcareous siltstone and lime - mudstone units overlying massive carbonate stratigraphy.This package of rocks is contained within a broad north-northeasterly trending structural corridor as interpreted by Natural Source Audio-Frequency Magneto-Telluric (NSAMT) geophysics and government supported regional mapping. Assays have been received for three holes which returned up to 2.13 m grading 0.87 g/t gold. While the weighted average grades of the mineralized zones are sub-gram gold, a number of key characteristics of the mineralizing system are recognized and include: Localized zones of intense decarbonatization accompanied by increased density of multi-phase calcite veining; Orpiment and realgar preferentially replacing portions of the decarbonatized siltstone and also occurring in later stage calcite veins; Increased silicification that correlates with decarbonatization within mineralized intervals; Anomalous thallium, mercury, arsenic and antimony trace element geochemistry exhibiting excellent correlation with gold mineralization
Drilling at the Erika project initially targeted epithermal style mineralization in holes ER-11-01 to ER-11-08 (2,546 meters) based on prior geological modeling coupled with geochemical and geophysical anomalies. This drilling intersected a series of limestone, clastic sediment and volcanic horizons with trace levels of gold, ranging from below detection to 55 ppb but significant values for arsenic ranging from below detection to 6,080 ppm.
Tarsis geological staff subsequently inspected historical drill core from 1997, specifically hole EK-03, which reportedly returned a 5.0 m interval averaging 0.48 g/t gold. This intersection is largely comprised of decarbonatized dirty siltstone containing patchy orpiment and realgar preferentially replacing decarbonatized matrix and open spaces within vuggy multi-phase calcite veins. Medium-to coarse-grained crystalline diagenetic pyrite is also disseminated throughout the interval. The mineralization appears to be largely stratabound although there are a number of crosscutting structural features in proximity to the decarbonatized and mineralized interval.
Five drill holes were located across a 650 m transect to establish vectoring data within this particular part of the mineralizing system.
The Company intends to pause the program to allow for all analyses to be obtained from the laboratory and to avoid operating during the rainy season, allowing for evaluation of the drill data to establish chemical and structural vectoring for additional drilling after the rainy season. In the interim, Tarsis has commissioned a high-resolution ground magnetic survey within the corridor of interest (5 kilometers by 3 kilometers) which should be completed during July, 2011. The results of the survey are expected to allow modeling of the structural architecture within this corridor and identification of potential feeder zones.