Identifikasi alterasi di lapangan sangat penting untuk menentukan zona mineralisasi endapan bijih. Jenis alterasi di lapangan dapat diketahui dengan mengidentifikasi mineral-mineral ubahan. jenis mineral-mineral ubahan secara cepat dan mudah dapat sitentukan dengan menggunakan PIM.
This chapter will be devoted to a general statement of the geology of the island of soemba, as it was known when the research in the field was terminated, that is, before the result of further research on the foraminifera by Dr. Van Der Vlerk and by myself had beenn applied to it.