标题：Indication of Hydrothermal Alteration Activities Based on Petrography of Volcanic Rocks in Abang Komba Submarine Volcano, East Flores Sea
其他标题：Gejala Alterasi dari Kegiatan Hidrothermal Berdasarkan Petrografi Batuan Beku Volkanik di Gunungapi Bawah Laut Abang Komba, Laut Flores Timur, Indonesia
摘要：The presence of mineral alteration or secondary processes to rocks on submarine volcano of Abang Komba was caused by an introduction of hydrothermal solutions. Those are indicated by the presence of a resembly of minerals alteration seen in their petrographic analyses. They are characterized by replacement partially surrounding of plagioclase phenocrysts, partially replacing plagioclase by sericite, carbonate and clay minerals. The replacement of pyroxene partly by chlorite, and the presence of albitisation (secondary albite) contained in fine rectangular plagioclase sized. Other fitures occasionally observed by the presence of partial oxidation of ore minerals and the presence of quartz, and epidote as an alteration from plagioclase and pyroxene.
其他摘要：Gejala alterasi atau proses-proses sekunder yang terjadi pada batuan di gunung bawah laut Abang Komba adalah disebabkan oleh introduksi larutan hidrotermal. Semua ini ditunjukkan dengan kehadiran kumpulan mineral ubahan yang terlihat dalam sayatan batuan.
关键词：alteration;resembly of minerals alteration;oxidation;submarine vulcano of Abang Komba
其他关键词：alterasi;kumpulan mineral ubahan;oksidasi;gunung bawahlaut Abang Komba
