SOURCE: i-minerals inc.

September 20, 2007 12:04 ET

2007 Drill Program Encounters Residual Clay Over Significant Acreage

Potential Source of Large Volumes of Kaolinite, Halloysite, Quartz and Potassium Feldspar

VANCOUVER, BC--(Marketwire - September 20, 2007) - i-minerals inc. (TSX-V: IMA) announces that further to the Company's press release of June 28, 2007, the 2007 drill program comprised of approximately 3,500 feet of HQ core drilling in 25 holes, has been completed. The purpose of the program was to evaluate the 1812 acres of State of Idaho mineral leases i-minerals holds in the Helmer-Bovill area that are underlain by the Thatuna granodiorite in order to determine the favorability of primary clay occurrences. Previous work on residual clays from the Helmer-Bovill Property indicates after conventional clay processing, a 90% < 2 microns product can be produced that is a unique combination of kaolinitic and halloysitic clays with an outstanding brightness (91.2% on the Tappi scale). According to Ginn Mineral Technologies, Inc. of Sandersville, Georgia, these mineral/pigment properties offer significant value to the paper, paint, plastic and ceramic industries. Furthermore, halloysite within the residual clays occurs as well-formed nanotubes, which is generating increasing interest in various nano-composite applications. During this 2007 drilling, wide intercepts of the kaolinite-halloysite-quartz-feldspar-bearing residual clays were encountered in several wide-spread locations. Core descriptions and core splitting are underway. Sample splits of residual and sedimentary clays will be sent to a lab in Tennessee for initial clay testing. All samples will be sent for whole rock chemistry.

Saprolitic weathering of the Thatuna granodiorite forms a clay-rich alteration rind that is the source of the residual clays that contain kaolinitic clays (kaolinite and halloysite), quartz and potassium feldspar. One area of significant interest to the Company and the subject of prior mining operations in the late 1960s and early 1970s is the area adjacent to the old Simplot pit in Section 21 (the "WBL Pit"). During the 2007 drill program, three holes were completed in the WBL Pit area. Visual descriptions of the core from these three holes suggest that subject to favorable analysis and metallurgical work, over 1.5 million tons of primary clay could occur on the northern limits of the WBL Pit and be readily accessible by expanding the current pit.

Outside of the immediate WBL Pit area, twelve additional holes were completed over the Helmer-Bovill mineral lease block underlain by the Thatuna granodiorite. All but one of these holes intersected significant thicknesses of primary clay, some of which had intercepts of over 100 feet. These twelve holes were widely spaced and pending laboratory results and clay characterization, represent significant acreage -- as much as 1000 acres of the aforementioned 1812 acre block -- favorable for the occurrence of primary clay.

Six additional holes in the general area that was targeting weathered phases of the Thatuna grandodiorite, penetrated sediments of the Latah formation containing kaolin clay. These sediments are located in the area north of Moose Creek Reservoir and were already interpreted to be a small sedimentary basin. These six holes expanded the size of the basin. Further clay testing will be conducted to determine the quality of the clay and whether further exploration is warranted in the sedimentary basin.

Four holes completed on the west end of the Helmer-Bovill Property intersected unweathered Thatuna granodiorite very similar to that seen in the Kelly's Basin deposit, the subject of an ongoing feasibility study by SRK Consultants of Denver, CO, where i-minerals intends to produce sodium feldspar and quartz products. The four holes outlined an area of approximately 160 acres area that, pending analysis and bench scale metallurgical testing, could add a significant volume of Thatuna granodiorite to the Kelly's Basin soda-spar deposit. With overburden averaging only 12 feet this new deposit appears readily exploitable and could add significant additional years of production to the Kelly's Basin deposit.

Finally, three holes targeting sedimentary clay deposits within the Latah Formation in the Corral Creek area intersected narrow widths of high quality clay, wider zones of lower quality clay or basalts that form the basement rock associated with lacustrine sediments in the Helmer Embayment. These holes are part of the drilling program started last summer and are not part of the 25 holes mentioned above. These holes along with those drilled last year will be evaluated geologically in order to determine the favorability of the Corral Creek area for sedimentary clays.

"With the successful completion of the 2007 primary clay drill program, we are developing the second leg of our business plan in parallel with the ongoing feasibility study on the Kelly's Basin sodium feldspar-quartz deposit," commented Roger Kauffman, President and CEO of i-minerals inc. "Portions of the baseline work we have undertaken as part of the Kelly's Basin feasibility can be captured in the advancement of our clay assets which stand to create synergies and shorten development timelines."

A. Lamar Long, CPG, is the Qualified Person ("QP") for the Helmer-Bovill project under NI 43-101. He oversees the quality control and quality assurance program and the construction of all samples for metallurgical analysis and reviews all analytical results prior to public release.

i-minerals inc.

per: "Roger Kauffman"

Roger Kauffman,
President & CEO

The TSX Venture Exchange has not reviewed and does not accept responsibility for the adequacy or accuracy of this release.

This News Release includes certain "forward-looking statements" within the meaning of the United States Private Securities Litigation Reform Act of 1995. Without limitation, statements regarding potential mineralization and resources, exploration results, and future plans and objectives of the Company are forward looking statements that involve various risks. Actual results could differ materially from those projected as a result of the following factors, among others: changes in the world wide price of mineral market conditions, risks inherent in mineral exploration, risk associated with development, construction and mining operations, the uncertainty of future profitability and uncertainty of access to additional capital.

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