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    <subfield code="a">Contribuci&#xF3;n al conocimiento de la g&#xE9;nesis del yacimiento de cobre "Chorrillos"; Distrito B&#xE1;rcena, Dpto. Tumbaya, Pcia. de Jujuy.</subfield>
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    <subfield code="a">The present work is the result of a long field surveying, which has been completed by a microscopie and microchemical study on more thet hundred polished sections coming from "Mina Chorrillos"; this investigation is one more contrubution of the Instituto de Geolog&#xED;a y Miner&#xED;as of the Universidad  Nacional de Tucum&#xE1;n, to the knowledge of mineral deposits and mining possibilities in the northern of the country. It is to bring out, that for the fulfilment of this work, it has been count with de full support of the Secretar&#xED;a de Ciencia y T&#xE9;cnica de la Universidad Nacional de Tucum&#xE1;n and the CONICET.</subfield>
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