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To: George J. Tromp who wrote (1981)3/15/1999 2:00:00 PM
From: Ross Dickie  Read Replies (1) | Respond to of 2251
 
Canabrava NEWS !!!!!!

Hey George,

There's a new press release out on Canabrava CNB and Paramount Ventures PVF - They are hooking up with $25mill from Kennecott in the WAWA area.

VSE SYMBOL: CNB

MARCH 15, 1999

Canabrava Diamond/Paramount Ventures & Finance: Major
Letter Agreement Signed With Kennecott - Ontario Diamond
Project

VANCOUVER, BRITISH COLUMBIA--Canabrava Diamond Corporation (CNB-V)
and Paramount Ventures & Finance Inc. (PVF-V) are pleased to
announce that they have signed a major Option/Joint Venture Letter
Agreement with Kennecott Canada Exploration Inc. to explore the
Company's Ontario Properties for diamonds. The Ontario Project
will include Canabrava's 100 percent owned Whitefish Lake Project,
as well as the KAP and Rocky Island Lake Projects which are owned
50 percent by Canabrava and 50 percent by Paramount. These
projects are located north east of Wawa, Ontario and include more
than 200,000 hectares of staked and leased lands.

Under the terms of the Letter Agreement, Kennecott will have the
exclusive right to acquire a 60 percent interest on all of the
Canabrava and Canabrava/Paramount Properties by spending
twenty-five million dollars (C$ 25,000,000) within seven years, or
by advancing the Project to a decision to begin development and
construction of a mine, whichever occurs first. Kennecott must
also commit to a minimum exploration expenditure totalling one
million five hundred thousand dollars (C$1,500,000) within
eighteen (18) months of executing the Option Agreement. Once
Kennecott has earned its 60 percent interest, the parties will
form a joint venture and fund ongoing exploration/development
programs on a pro-rata basis. Kennecott will be the operator.
The terms outlined in the Letter Agreement are subject to the
completion of a formal Option Agreement, and management and
regulatory approvals.

Canabrava and Paramount have been exploring for diamonds in this
area for two years , and the programs to date have been very
successful in defining numerous target areas permissive for the
discovery of diamondiferous kimberlites. The Companies are
extremely pleased to have Kennecott join this exciting Project.
Kennecott brings extensive experience and an enviable record of
success in diamond exploration to the Project.

Canabrava Diamond Corporation is actively exploring for diamonds
in Brazil and Canada and looking at other opportunities worldwide.
The Company is 59.6 percent owned by Southwestern Gold
Corporation (SWG-T). Paramount Ventures & Finance Inc. is a well
financed junior exploration company with copper and gold projects
located in Argentina and in Indonesia, and diamond projects
located in Brazil.

Rory O. Moore, President

Canabrava Diamond Corporation

Paul Conroy, Chairman

Paramount Ventures & Finance Inc.




To: George J. Tromp who wrote (1981)3/28/1999 4:25:00 PM
From: E. Charters  Read Replies (2) | Respond to of 2251
 
Economic Geology
Vol. 53, 1958, pp. 22~226

REVIEWS

The Diamonds of Siberia. By A. P. BOBRIEVICH and others. Pp.158; figs. 192, map 1. Gosudarstvennoe nauchnotekhnicbeskoe izdatel'stvo literatury PO geologii i okhrane nedr, Moscow 1957. Price, Roubles 14.85. (In Russian.)

This book is contributed by 14 authors and presents an account of preliminary studies, during the period of 195~1958, of diamond deposits in the basin of Vilyuy, the left tributary of Lena River, in eastern Siberia. The diamond deposits occur in an area of 300,000 sq km in the central part of the Siberian platform. There are two subprovinces where the diamondbearing kimberlite pipes have been
discovered.

Both subprovinces are located on the border of the Tungusian syneclise where the stratigraphic sequence is represented almost exclusively by Ordovician carbonaceous formations and trap effusives. The southern subprovince is located in the basin of Malaya Botuobiya River (tributary of Vilyuy), and is associated with a local swell on the slope of Mesozoic subsidence. The largest kimberlite "pipe Mir," measuring 490 by 320 m, was discovered in this region within Ordovician dolomites, limestones, and marls.

The pipes are filled with brecciated kimberlite with inclusions of related ultrabasic rocks, eclogites, and Archean crystalline schists. The inclusions of limestone are not altered. Generally, kimberlite contains up to 50 percent of foreign material. Slickensides are developed on the surface of kimberlite fragments, especially near the contact with the country rock. The fractures served as channels for hydrothermal solutions that resulted in carbonatization of kimberlite. The southern subprovince is located in the basin of Daaldyn River, on the northeastern horder of the syneclise. Here again, the vertical kimberlite pipes pierce horizontal carbonaceous deposits of Lower Paleozoic age, with trap intrusions forming dikes and sills.

The swarms of kimberlite pipes are structurally related to deep tectonic fractures; however, the area of predominant distribution of kimberlite pipes is located outside the region of maximum development of trap. In this subprovince, the diameters of pipes range from 40 to 600 m (pipe "Zarnitsa"). The age of kimberlite pipes is considered as post-Permian, and even as post-Triassic.

The kimberlites are composed of olivine, phlogopite, augite, ilmenite, perovskite, and apatite. The diamonds are associated with this suite of minerals. Pyrope, monoclinic pyroxene, spinel, chromite, kyanite, corundum, and rutile are present as fragments derived from xenoliths.

The secondary minerals are represented by serpentine. calcite, quartz, dolomite, chalcedony, and zeolites. The pyrope-rich xenoliths of eclogite represent a rock unknown within the Siberian Archean formations. The association of kimberlite with eclogites throughout the world demonstrates a close genetic relationship of these rocks. A gradual transition between Archean hypersthene schists and eclogite has been recorded in xenoliths in kimberlite.

The most characteristic companions of diamond are pyrope and ilmenite. Pyrope from kimberlites a higher content of chromium and calcium than pyrope from other rocks

Ilmenite, in turn, contains considerably more iron and magnesium oxide than the ordinary ilmenite. Chromium and vanadium are present in ilmenite taken from kimberlite, and are absent in ilmenite from trap.

220

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