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Gold/Mining/Energy : Houston Lake Mining [HLM-ASE] -- Ignore unavailable to you. Want to Upgrade?

To: AriKirA who wrote (149)	3/30/1999 1:36:00 PM
From: DRT	Read Replies (1) \| Respond to of 364

The following is a summary of the results of the numerous bulk and mineral samples submitted for analysis to the Geoscience Laboratories of the OGS for analysis: Size - "250 m in strike length, open to the SE and NW" - 10-70 metres width, expanding in width to the se Characteristics - "several mineralogical and chemical characteristics comparable to the Tanco-type pegmatite" - "same petalite subtype as the Tanco deposit" - "highly evolved tantalum-rich oxide mineralogy" - "contains STIBIOTANTALITE", only known to occur in "highly fractionated rare-element pegmatites" - "contains the valuable cesium mineral POLLUCITE and widespread phosphate phase MONTEBRASITE" - "strong internal zonation marked by an impressive spodumene+quartz core zone that represents replacement of original petalite: LiO2 ranges from 4.33 to 4.79% in successive one meter channel samples across 5 metres and a large bulk sample of exoliated slabs contains 4.33% Li2O" - "wall zone contains highest Ta and Rb values encountered to date: 1% Rb is the highest bulk content for the metal yet found in NW Ontario. Small sample suite reveals Ta2O5 between 0.03 and 0.05%" - "due to the internal zonation, vertical changes in zones could occur with depth and hence the pegmatite must be diamond drill evaluated after a comprehensive surface exploration program...zonation could result in cesium-, rubidium- and tantalum-rich units on surface or at depth" - " an extensive Li-Cs anomaly occurs in the granite host-rocks adjacent to the SW contact of the Pakeagama Lake pegmatite and is marked by the widespread NOLMQUISTITE, a key exploration indicator mineral of Li-rich pegmatites ... the distribution of the holmquistite was traced a minimum of 120 metres ... is the most significant variation yet described in the literature...usually developed only within a few cms of a Li-rich rare-metal pegmatite" - "the Li-Cs metasomatic anomaly is interpreted as due to a large blind rare-metal pegmatite at depth that may represent an en-echlon body to mass exposed on surface or is a flat-lying apophysis from the main pegmatite body. The anomaly requires drilling to test the interpretation." - "556 EMP (Electron MicroProbe) analyses of rare - metal minerals from the Pakeagama Lake pegmatite have been undertaken by Dr. Tindle (a leading EMP scientist, The Open University, UK) ... has importantly established several economically-important tantalum minerals ... most notable is the strong trend of increasing tantalum contents in the Mn-rich part of the columbite- tantalite quadrilateral plot which is characteristic of deposits enriched in tantalum such as the Tanco Pegmatite." I'll highlight additional results from the OGS report later. DRT