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Island-Arc Resources Vanuatu -- Property Applications Made.


VANCOUVER, British Columbia--(BUSINESS WIRE)--Dec. 6, 1996-- Island-Arc Resources (VSE See DOS/VSE.

VSE - Virtual Storage Extended
 IAR IAR - Instruction Address Register.

The IBM name for program counter.
.) Island-Arc Resources Corporation has completed an initial technical review of mineral exploration opportunities in the country of Vanuatu (formerly the New Hebrides) in the South Pacific, approximately 3/4 of the way between Hawaii and Australia. As a result of the encouraging results generated by this review, the Company has applied for six prospecting licenses in Vanuatu covering approximately 170 square miles.

The position of Vanuatu along the Rim of Fire targets the archipelago as having potential for porphyry copper-gold and epithermal gold 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.
. North of Vanuatu, the volcanic arc hosts epithermal gold deposits at Sorowar, Ladolam (Lihir) and Kabang immediately east of New Ireland (Papua New Guinea Papua New Guinea (păp`ə, –y  "PNG (Portable Network Graphics) A bitmapped graphics file format endorsed by the World Wide Web Consortium. It is expected to eventually replace the GIF format, because there are lingering legal problems with GIFs. "), Porgera, PNG and at Gold Ridge on the Solomon Islands; it also hosts the mega-porphyry copper-gold deposit at Panguna on Bougainville. East and south of Vanuatu, epithermal gold deposits occur at Emperor on Fiji, and at Golden Cross, Thames, Waihi, and Karangahake in the Coromandel Cor`o`man´del   

n. 1. (Geol.) The west coast, or a portion of the west coast, of the Bay of Bengal.
Coromandel gooseberry
See Carambola.
Coromandel wood
Calamander wood.
 goldfield of the North Island, New Zealand.

The mineralization in the southwest Pacific is intrinsically related to calc-alkalic volcano-plutonic arcs constructed during subduction along plate boundaries. However, the epithermal deposits east of PNG, in Fiji and in the Coromandel goldfield are also associated with felsic to mafic alkalic rocks and normal faulting indicating an extensional tectonic regime, probably in a backarc or intra-arc setting. In Vanuatu, since the Late Miocene, subduction and arc volcanism were accompanied by regional transtensional tectonism tec·ton·ism  
n.
1. The structural behavior of an element of the earth's crust.

2. Crustal instability.



[tecton(ic) + -ism.]
, but from about 3 Ma to the present the locking of the subduction zone by collision of the d'Entrecasteaux zone with the arc has resulted in a local transpressional stress regime.

The mineralization of possible economic potential in Vanuatu is divisible into three main types: -0- -- volcanic-hosted epithermal gold; -- intrusion-hosted porphyry copper-gold; and -- "Porgera-style" gold. -0- EPITHERMAL GOLD IN VANUATU

Important epithermal-style gold prospects in Vanuatu are known in three areas: southeast Espiritu Santo, southeast Malakula, and north Efate. The prospects on Espiritu Santo and Malakula are broadly similar in many respects, and some of their characteristics are summarized below. -0- -- The prospects are located on a near major northwesterly north·west·er·ly  
adj.
1. Situated toward the northwest.

2. Coming or being from the northwest.



north·west
 or north-northwesterly trending faults, generally localized where the major structures are intersected and disrupted by cross-cutting structures.

-- The mineral occurrences are hosted by a highly mixed sequence of andesitic to locally trachytic tra·chyte  
n.
A light-colored igneous rock consisting essentially of alkali feldspar.



[French, from Greek trkhus, rough.
 volcanics, volcaniclastic sediments, and minor limestone.

-- Deposits occur in a wide variety of styles, including: quartz stockworks; quartz veins; silicified si·lic·i·fy  
v. si·lic·i·fied, si·lic·i·fy·ing, si·lic·i·fies

v.tr.
To convert into or impregnate with silica.

v.intr.
To become converted into or impregnated with silica.
 volcanics; tectonic, hydrothermal, and vent breccias; shears; and silica-sulphide +/- manganese replaced limestone. Gold-bearing amethystine quartz is present in south Malakula.

-- A high base-metal content is commonly manifested as Zn - Pb +/- Cu sulphides and strongly anomalous base metals in soils.

-- Extensive post mineral faulting has led to complex structural and lithological relationships at most prospects.

-- Envelopes of clay - pyrite +/- sericite +/- carbonate +/- hematite +/- alteration accompany the deposits.

-- Petrological and alteration-mineralogy studies show that the mineralization is of typical low-sulphidation type occurring at levels ranging from about 50 m below the paleosurface to the deep epithermal-subvolcanic transition. -0-

At Fatmalapa on north Efate, gold is hosted by quartz veins in propylitized and argillized shoshonitic mafic volcanics on the margin of a large caldera-like feature. The quartz veins are controlled by ring fractures, and the gold is associated with anomalous As, Sb and Hg in soils.

PORPHYRY COPPER-GOLD IN VANUATU

A number of Late Miocene small multiphase strongly fault-controlled high-level intermediate (diorite diorite

Medium- to coarse-grained igneous rock that commonly is composed of about two-thirds plagioclase feldspar and one-third dark-coloured minerals, such as hornblende or biotite.
, microdiorite and andesite andesite

Any member of a large family of rocks that occur in most of the world's volcanic areas, mainly as surface deposits and to a lesser extent as dikes and small plugs.
) stocks intrude the Miocene volcanics and volcaniclastic sediments in central and north Malakula, and in western Espiritu Santo. Some of these intrusives have associated porphyry-style copper-gold occurrences, the characteristics of which are summarized below: -0- -- They are located near major regional faults.

-- They are associated with magnetite-bearing oxidized oxidized

having been modified by the process of oxidation.


oxidized cellulose
see absorbable cellulose.
 intrusives.

-- Detrital gold occurs in drainages, and locally anomalous gold, copper, and base metals are found in stream sediments and soils.

-- They are accompanied by propylitic, sericitic and local potassic alteration.

-- Sulphides (pyrite +/- chalcopyrite +/- minor pyrrhotite) occur as disseminations, veins, stockworks and irregular masses within and near the intrusions.

-- Small gold-bearing magnetite +/- pyrite +/- chalcopyrite skarn bodies are present in limestone adjacent to intrusives in southwest Espiritu Santo, and as creek float in north Malakula. -0-

Geochemical haloes and intrusive relationships suggest that, in some cases, the present level of erosion coincides with the tops of the mineralized min·er·al·ize  
v. min·er·al·ized, min·er·al·iz·ing, min·er·al·iz·es

v.tr.
1. To convert to a mineral substance; petrify.

2. To transform a metal into a mineral by oxidation.

3.
 systems.

"PORGERA-STYLE" GOLD IN VANUATU

In northwest Espiritu Santo (at Pealapa) gold without appreciable copper or extensive porphyry-style alteration is associated with a locally brecciated strongly fault-controlled high-level intermediate (diorite porphyry) intrusive complex. The intrusive complex is located on a major regional fault marking the western margin of the Big Bay graben. Some features of this style of mineralization are set out below: -0- -- A significant detrital gold train is shedding in several creeks.

-- Gold is associated with pyrite in shears, fault breccias, crackle breccias and quartz veins.

-- The deposit is accompanied by silica - chlorite chlorite

Widespread group of layer silicate minerals composed of hydrous aluminum silicates, usually of magnesium and iron. The name, from the Greek for “green,” refers to chlorite's typical colour.
 - epidote epidote

Any of a group of colourless to green or yellow-green silicate minerals with the general chemical formula A2B3(SiO4)(Si2O7)O(OH), in which A is usually calcium (Ca) and B
 - carbonate alteration.

-- The deposit is accompanied by weakly anomalous copper, zinc and silver in rocks and soils. -0-

Until 1984, mineral prospecting for base and precious metals in Vanuatu was sporadic and at local scale. However, since the discovery of the epithermal gold deposits at Ladolam, Gold Ridge, and other places along the Rim of Fire, systematic exploration has been undertaken on all the medium to large islands, which has led to the recognition of various important gold prospects.

After 1988, the exploration activity tapered off, but since the early 1990's a few companies have carried out detailed exploration in areas prospective for gold mineralization. So far, little drilling has been undertaken, and Vanuatu is less explored than areas of equivalent potential elsewhere in the southwest Pacific or eastern Australia. Most of these prospective areas have not been explored in sufficient detail for adequate evaluation.

The Company intends to commence a first phase exploration program consisting of geological mapping and prospecting, geochemical and geophysical surveys in early 1997 upon receipt of government approvals for its license applications.

Island-Arc will own a 60 percent interest in the Vanuatu project and it has a further right, subject to regulatory acceptance, to increase its interest to 80 percent, subject to a 3 percent NSR NSR
abbr.
normal sinus rhythm


NSR Normal sinus rhythm, see there
, by completing the issuance of up to 200,000 common shares in four equal installments. Island-Arc is continuing to review other mineral exploration opportunities along the Rim of Fire.

ON BEHALF OF THE BOARD Kim M. Phillips, President -0-

Note To Editors: The Vancouver Stock Exchange Vancouver Stock Exchange (VSE)

A securities and options exchange in Vancouver, British Columbia, (Canada), specializing in venture capital companies.


Vancouver Stock Exchange

See Canadian Venture Exchange (CDNX).
 has not reviewed and does not take responsibility for the adequacy or accuracy of the contents.

CONTACT: Island-Arc Resources Corporation

Kim Phillips, 604/682-4488 or 800/868-4788

E-mail: islandarc@island-arc.com
COPYRIGHT 1996 Business Wire
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 1996, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

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Date:Dec 6, 1996
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