Caldera Resources Inc.: Ellendale East Diamond Project-Western Australia.SOUTH PERTH, Western Australia This article is about an inner southern suburb of Perth. For the local government area, see City of South Perth. South Perth is an inner southern suburb of Perth, Western Australia, immediately opposite the central business district of Perth on the -- CALDERA caldera: see crater. caldera Large, bowl-shaped volcanic depression that forms when the top of a volcanic cone collapses into the space left after magma is ejected during a violent volcanic eruption. The term is Spanish for “caldron. RESOURCES INC inc - /ink/ increment, i.e. increase by one. Especially used by assembly programmers, as many assembly languages have an "inc" mnemonic. Antonym: dec. . (TSX TSX Toronto Stock Exchange (TSE before April, 2002) TSX Transfer from Stack Pointer to Index TSX True Space Extension :CDR (1) See CD-R and extension. (2) (Call Detail Reporting) See call accounting. (3) (Common Data Rate) A standard sampling rate for digital video for 480i and 576i systems. The rate is 13.5 MHz. See ITU-R BT. ) - ELLENDALE HEADS TO MAJOR PROJECT STATUS. Caldera Resources Inc. (TSX:CDR) is pleased to announce results and interpretation of the July 2005 drill program carried out on the Ellendale East Project. The project area covers 246 square kilometres and is located 25 kilometres along strike from the Ellendale 4 Mine which is owned and operated by Kimberley Diamond Company NL. Mr. Ronald Winston, Chairman of Harry Winston Harry Winston (March 1, 1896 – December 8, 1978) was an American jeweller. He donated the Hope Diamond to the Smithsonian Institution in 1958 after owning it for a decade. Inc. New York New York, state, United States New York, Middle Atlantic state of the United States. It is bordered by Vermont, Massachusetts, Connecticut, and the Atlantic Ocean (E), New Jersey and Pennsylvania (S), Lakes Erie and Ontario and the Canadian province of , has a right to farm-in arrangement on the Ellendale East Project, whereby Mr. Winston may elect to earn 50% interest in the project by reimbursing the company A$400,000 and expending A$3Million on further development exploration over 2 years. A further 10% interest can be earned by paying Caldera A$1Million and expending a further A$7Million over a three year term. Mr. Winston has been provided with a project report and has 30 days from February 14, 2006 to decide if he accepts the right to farm-in. The company is extremely encouraged by the results, particularly as most targets were drilled with only a single hole, and believes that the project will develop into a significant and important asset for the future. The following are the key points of interest. A more detailed report by Dr. G. Pooley is also included for readers with a technical background. - Volcanoclastic quartz tuff, which is one of the predominant diamond bearing rocks in the Ellendale Lamproite Field has been identified at six of the targets drilled by Caldera. This includes one target which was believed to be two separate targets, prior to the 25 metre airborne magnetic data becoming available. - Caldera's work has established a southern extension of the Ellendale Lamproite Field as a potential diamond bearing entity in its own right. - One large target, of in excess of 200 hectares has similar dimensions to those of the Ellendale 4 and 9 Pipes which are currently being mined by Kimberley Diamond Company NL. Geophysical modelling of this target indicates a body with large depth extent. - Micro-diamonds have been identified in drill chip thin sections from the large Caldera target. - One 170 micron diamond fragment from a larger stone was recovered from a 19.8 kilogram caustic fusion sample in the +100 -300 sieve fraction. - Chrome spinel spinel, magnesium aluminum oxide, MgAl2O4, a mineral crystallizing in the isometric system, usually as octahedrons. It occurs as an accessory mineral in basic igneous rocks, in aluminum-rich metamorphic rocks, and in contact-metamorphosed chemistry indicates potential for an additional two pipes to be diamondiferous. - The drill program achieved its objective of identifying at least six new volcanoclastic/intrusions even though most targets were only drilled with single drill holes. - Excellent potential for discovery of additional pipes in southern part of the same Exploration Licence. - Further drilling with large diameter holes is required to determine the areal and depth extent of the bodies and to undertake a bulk sampling program. Sample processing was completed at North Australian Diamond Laboratory, Diatech Heavy Mineral Services and Diamond Recovery Services, all of Perth, Western Australia This article is about the metropolitan area of Perth, Western Australia. For the local government area, see City of Perth. Perth is the capital of the Australian state of Western Australia. . Mineral grain identification including diamond was carried out on the Scanning Electron Microscope scan·ning electron microscope n. Abbr. SEM An electron microscope that forms a three-dimensional image on a cathode-ray tube by moving a beam of focused electrons across an object and reading both the electrons scattered by the object and at CSIRO CSIRO Commonwealth Scientific & Industrial Research Organization (Australia) . Electron Probe analyses of chrome spinels was carried out at UWA UWA University of Western Australia UWA University of West Alabama (Livingston, Alabama) UWA United Way of America UWA University of Wales, Aberystwyth UWA Uganda Wildlife Authority UWA Unified Watershed Assessment UWA Ultra Wide Angle . Geophysical work was done by Barrett Geophysical Exploration Consultants Pty Ltd PTY LTD Propriety Limited (company structure in Australia) of Western Australia Western Australia, state (1991 pop. 1,409,965), 975,920 sq mi (2,527,633 sq km), Australia, comprising the entire western part of the continent. It is bounded on the N, W, and S by the Indian Ocean. Perth is the capital. . Dr. Greg Pooley, a member of the Aus. I.M.M. is the qualified person responsible for the technical information in this news release. Dr. J Noun 1. Dr. J - United States basketball forward (born in 1950) Erving, Julius Erving, Julius Winfield Erving . Daniels, Chairman and technical director also offered advice as to the various interpretations. Other Activities. Caldera is engaged in diamond exploration in Australia through five projects. Two projects are located in the Pilbara region of northern Western Australia, one of which is joint ventured with Mr. Ronald Winston of Harry Winston Inc. The Company also has two projects located adjacent to the Ellendale Lamproite Field in the Kimberley region of Western Australia, one of which is also joint ventured with Mr. Ronald Winston. One project is located on the Yilgarn Craton | The Yilgarn Craton is a large craton which constitutes the bulk of the Western Australian land mass. It is bounded by a mixture of sedimentary basins and Proterozoic fold and thrust belts. Zircon grains in the Jack Hills, Narryer Gneiss Terrane have been dated at ~4. of Western Australia which is joint ventured with SouthernEra Diamonds Inc. (SDM SDM - Schematic Data Model :TSX). The SouthernEra tenements also include a joint venture with BHP Billiton BHP Billiton is the world's largest mining company.[1] Its origin is in the 2001 merger of Australia's Broken Hill Proprietary Company (BHP) and the UK's Billiton, which has a South African background. The result is a dual-listed company. Limited on a nickel/platinum project. Caldera also has three base metal/gold projects in South Australia. One of these projects is the Mt. Carulina Project which is an Olympic Dam - style base metal/gold target. CAUTIONARY STATEMENT No stock exchange, securities commission or other regulatory authority has approved or disapproved the information contained herein. This News Release includes certain "forward-looking statements". All statements other than statements of historical fact, included in this release, including, without limitation, statements regarding potential mineralization Mineralization The process by which the body uses minerals to build bone structure. Mentioned in: Rickets mineralization, n the bioprecipitation of an inorganic substance. and reserves, exploration results, and future plans and objectives of Caldera, are forward-looking statements that involve various risks and uncertainties. There can be no assurance that such statements will prove to be accurate and actual results and future events could differ materially form those anticipated in such statements. Important factors that could cause actual results to differ materially from Caldera's expectations are exploration risks detailed herein and from time to time in the filings made by Caldera with securities regulations. ELLENDALE EAST - CALDERA RESOURCES INC. Summary of Activities and Resource Potential - Dr. G. Pooley AUS.I.M.M. Caldera Resources Pty Ltd, the wholly owned subsidiary Wholly Owned Subsidiary A subsidiary whose parent company owns 100% of its common stock. Notes: In other words, the parent company owns the company outright and there are no minority owners. of Caldera Resources Inc., has located two diamond bearing volcanoclastic quartz tuffs in a known diamond bearing lamproite field - the Ellendale Diamond Field. Based on close-spaced low-level aeromagnetic data an extremely large anomaly has been discovered, consisting of targets ELL-008 and ELL-027. This aeromagnetic anomaly consists of two main domains which are intimately linked to form an aeromagnetic feature which is approximately 3.3 kilometres long and 1.5 kilometres wide. The main axis of the the diameter of the sphere which is perpendicular to the plane of the circle. See also: Axis anomaly trends east-west in a narrow corridor of aeromagnetic anomalies that trend northwest. This directional axis is identical to that of the Ellendale 4 and Ellendale 9 Pipes which are owned and operated by Kimberley Diamond Company NL. A minor component of the regional structural geology in the Ellendale diamond field is the critical east- northeast linear feature which when coupled with the major northwest trending structural lineament lin·e·a·ment n. 1. A distinctive shape, contour, or line, especially of the face. 2. A definitive or characteristic feature. has provided an access pathway for the majority of the diamond bearing lamproites in this field. In this case, the critical minor structural component cuts directly through the known Camarotoeicha Creek lamproite in the west and Caldera's targets, ELL-008 and ELL-027 find to the east. The Ellendale diamond bearing lamproites are characteristically different from kimberlites. Pyroclastic py·ro·clas·tic adj. Composed chiefly of rock fragments of volcanic origin. pyroclastic Composed chiefly of rock fragments of explosive origin, especially those associated with explosive volcanic lamproites are maar-type volcanic eruptions volcanic eruptions discharging of fumes, dust and lava from volcanoes. They have damaging potential in addition to those of being physically overpowering by the lava flow or the ash or dust fallout. . These phreatomagmatic explosive eruptions result from the interaction of highly charged fluid-rich magmas with the water saturated country rocks into which they are intruding. At the surface the vent enlarges by inward slumping of wall rocks along low angle slip faults. The country rocks consisting of sandstones and siltstones disaggregate See disaggregated. to form quartz rich lapilli la·pil·lus n. pl. la·pil·li A small, solidified fragment of lava. [Latin, diminutive of lapis, stone.] tuffs. Subsequently the eruption of fragmental frag·men·tal adj. 1. Fragmentary. 2. Geology Consisting of broken rock, coal, or ore moved from its place of origin. frag·men juvenile material forms lamproite lapilli tuffs. The build up of these thick sequences of tuffs isolates the groundwater from the vent causing the magma to degas Degas To release and vent gases. New building materials often give off gases and odors and the air should be well circulated to remove them. Mentioned in: Multiple Chemical Sensitivity resulting in the eruption of a more passive lamproitic magma within the vent. The lava lakes slowly cool. Millions of years of weathering and erosion strips the upper levels of the pipe(s) causing heavy minerals and diamonds to be enriched in the top few metres of the pipe. Interestingly, surface sampling of the Ellendale 4 and Ellendale 9 Pipes which are currently being mined by Kimberley Diamond Company NL and located some 25 kilometres to the northwest of Caldera's Exploration Licence indicates higher diamond grades above pyroclastic (tuffaceous) rocks than above magmatic lamproite: Diamond Grade (Carats per 100 tonnes) Lamproite Tuff Magmatic Lamproite Ellendale 4 25 less than 5 Ellendale 9 10 less than 5 This implies that substantially more diamonds are present in the tuffaceous material of these eruptions. Any resource shown to have a reasonable volume of tuffaceous material which is diamond bearing is extremely prospective. At ELL 008-027 two air-core drill holes have intersected volcanoclastic quartz tuff at 69 and 62 metres. These materials are diamond bearing. Presumably pre·sum·a·ble adj. That can be presumed or taken for granted; reasonable as a supposition: presumable causes of the disaster. the olivine-rich lapilli tuff lies below the quartz-rich lapilli tuff and somewhere within this complex lies the magmatic lamproite that produced these pyroclastics. It is highly likely that the low-level aeromagnetic anomaly described above of some 500 hectares is outlining an extremely large lamproitic resource. Furthermore, the discovery of diamond fragments in drill cuttings from this resource is remarkable considering that only relatively small amounts of the drill material have been fused. This resource requires immediate systematic drill sampling and bulk testing. Diamond Indicator Minerals Chromian spinel is a useful diamond indicator mineral. It is present in orders of magnitude of greater abundance than the diamonds themselves. It is relatively stable under normal temperatures and pressures and often decomposes slowly. Its pristine chemical composition can be used to reflect the temperature and pressure regime under which it crystallised Adj. 1. crystallised - having become fixed and definite in form; "distinguish between crystallized and uncrystallized opinion"- Psychological Abstracts crystallized and therefore indicate whether it was originally associated with diamonds. Chromian spinels from Caldera's ELL 008-027 anomaly have a very similar element distribution in terms of Cr/(Cr+Al) and Fe/(Fe+Mg) ratios compared with chromian spinels from the diamond bearing lamproites Ellendale 4 and Ellendale 9. In addition to ELL 008-027, there are six other aeromagnetic anomalies that have produced volcanoclastic quartz tuff in Caldera's leases. The chromian spinels from these rocks also have very similar Cr/(Cr+Al) and Fe/(Fe+Mg) ratios compared with those from the diamond bearing lamproites Ellendale 4 and Ellendale 9. The diamond bearing Spielers Bore lamproite lies amongst Caldera's aeromagnetic anomalies and it also produces chromian spinels of which the mineral chemistry confirms its diamond bearing potential. Immediately outside the western boundary of Caldera's lease lies the long established Camarotoeicha Creek lamproite. This lamproite is also characterised by an aeromagnetic anomaly which is similar to the aeromagnetic anomalies discovered by Caldera however, it consists wholly of magmatic lamproite and probably contains very few diamonds. It appears that the associated tuffs which may have contained abundant diamonds have been eroded away which was possibly the result of differential uplift in the immediate area. The fact that the Caldera anomalies contain substantial thicknesses of volcanoclastic quartz tuffs not only implies a high potential for the discovery of a primary diamond resource but it also indicates that the Caldera anomalies are relatively well preserved. This implies that the Caldera corridor of lamproitic anomalies was once a geomorphological ge·o·mor·phol·o·gy n. The study of the evolution and configuration of landforms. ge  o·mor low compared with the
immediate western palaeo- surface. The western sector of the Caldera
leases may well contain the eroded diamond bearing alluvial detritus detritus /de·tri·tus/ (de-tri´tus) particulate matter produced by or remaining after the wearing away or disintegration of a substance or tissue. de·tri·tus n. pl. of the upper levels of the Camarotoeicha Creek lamproite. Critical Factors for Diamond Potential in the Ellendale East Lamproite Field 1. Well defined aeromagnetic anomalies: the Caldera leases at Ellendale East contain a number of discrete low-level aeromagnetic anomalies whose shape and areal extent are strikingly similar to the shape and areal extent of the presently mined diamond bearing lamproites of Ellendale 4 and Ellendale 9 some 25kms to the northeast. 2. Presence of volcanoclastic tuffs: six anomalies tested to date contain substantial thicknesses of volcanoclastic quartz tuff. Preliminary testing of drill chips has located fragments of diamonds in two of these anomalies. It is expected that with proper bulk sampling techniques that all the anomalies containing volcanoclastic quartz tuff will prove positive. 3. Appropriate structural control: detailed low-level aeromagnetic maps of the Caldera leases and the surrounding environment indicate a precise and systematic control of the emplacement of lamproites in the East Ellendale Field. This control is identical to that found further to the northeast in the Ellendale Diamond Field proper. It is clearly evident from aeromagnetic data that the emplacement mechanism involving the injection of the lamproitic magma which has produced the largest and richest primary deposits is controlled by these two lineaments. 4. Diamond associated chromian spinels: all the anomalies tested to date contain chromian spinels whose compositions indicate that they are in equilibrium with diamond. These chromian spinels are strikingly similar to those recovered from the Ellendale 4 and Ellendale 9 diamond mines. 5. Province of known diamond bearing lamproites: over 100 lamproite pipes have been discovered in the Ellendale Diamond Field. A number of these are successfully producing some extraordinarily beautiful gem quality diamonds from mines owned and operated by Kimberley Diamond Company NL. Caldera has discovered an additional seven aeromagnetic anomalies that contain volcanoclastic quartz tuff and diamond indicator minerals, two of these anomalies also contain diamonds. Caldera's work has established the southern portion of the Ellendale Diamond Field as a potential diamond bearing entity in its own right. Cusip:1287D 105 Canada Suite 3100 40 King Street West Toronto. Ontario. M5H 3Y2 Telephone: 416-865-6605 Facsimile: 416-865-6636 Website: www.calderares.com Australia 1 Charles Street Suite 8 South Perth. Western Australia. 6151 Telephone: 011-618-9367-7728 Facsimile: 011-618-9367-7705 E-mail: calderares@bigpond.com Caldera Resources Inc. (TSX:CDR) |
|
Printer friendly
Cite/link
Email
Feedback
Reader Opinion