KARAKTERISTIK PEMBENTUKAN LAVA SUNGAI PARAGA DAERAH SALOPA DAN SEKITARNYA, KABUPATEN TASIKMALAYA, PROVINSI JAWA BARAT

Abstract

Salopa area, Tasikmalaya Regency, West Java Province is regionally located in the Jampang formation which is dominated by volcanic material. Seen from its positive potential, it is one of the areas that has the potential as a location for the formation of non-biological natural resources such as minerals and minerals. The lava of the research area is part of volcanism activity which has a unique shape. This makes researchers interested in studying the rock genesis of the Paraga River lava, considering that there has been no special study of the genesis of the lava of the research area by previous researchers. The method used in the research consists of petrographic analysis and geochemical analysis of rocks using the XRF (X-ray Flourescence) method to determine the main elements in rocks. Based on the results of the research, the characteristics of Basalt Lava rocks in the research area petrographically include a type of volcanic rock with the name basalt (Streckeisen, 1976) and geochemically has a basic magma composition with the name Basalt rock according to the classification (Le Maitre et al, 1989), with a temperature of ±1000oC. Magma in the study area belongs to the calk-alkaline series group with a depth of ± 165.69 Km, the last stage of magma differentiation.
Keywords: Salopa, Lava, XRF, Petrography, Geochemistry