A semi-analytical solution to the 2-D forward modelling of viscoelastic relaxation in a heterogeneous sphere induced by a surface toroidal force is derived. The model consists of a concentrically-nested elastic lithosphere, a viscoelastic mantle, and a eccentrically-nested viscoelastic core. Since numerical codes based on finite-element or spectral-finite-difference techniques for modelling vis…
Speculation about basalts began early. Pliny's Natural History was published about A.D.77 (see Adams, 1938) and classified basalt as black marble, but he referred to most dense building stone as marble, so probably was implying no genetic link. Although some ancient Greeks and Romans correctly guessed that basalts were related to volcanism, at the end of the Dark Ages basalts was thought to be …
Geology has been charged with failure to measure up to the intellectual standard of the so-called "exact" sciences. The reproach is no longer merited. It originated during a century when the power of the experimental method in science was first clearly appreciared. As usually the case with great dicoveries, this was soon give exaggerated importance by many students of the logic of science. Now …
This volume has had a profound influence on the younger generation of geologists because it has emphasized the importance of the point that sound principles of physical chemistry underlie geological processes. It showed how a knowledge of the equilibrium relations in silicate systems, in conjuction with field observations on the rocks and studies of the rock-forming minerals, helped to elucidat…
Bodies of rock possess a wide variety of physical, chemical, spatial, and chronological properties that reflect the geologic processes responsible fot their formation. Petrology is the study of these properties and processes. In this chapter, we will consider how paricular properties of bocies of rocks can provide specific clues to the origins. The petrologically most meaningful properties are …
The recently published Oceanographic Atlas of the International Indian Ocean Expedition is based on a hydrographic and bathythermographic data set containing all onservations from International Indian Ocean Expedition from 1960 to 1965 as well as additional data from previous years. These data, compiled at the University of Hawaii and later supplemented with some recent observations, form the b…
It was the deep-seated conviction of Paul Gast that the trace element approach was at least as powerful as expertimental petrology to solve the major petrological problems. In this paper, we review the present status of the utilization of trace elements in igneous processes, which acknowledges his opinion. After a study of the historical development of trace element geochemistry which indludes …
Guna menunjang rencana pengembangan Panas Bumi sebagai sumber tenaga listrik, telah dilakukan penyelidikan pemetaan thermal dan perhitungan kehilangan panas daerah panas bumi Ulumbu dan sekitarnya yang mencakup kenampakan di Ulumbu, sekitar kenampakan dibekas kaldera Pocoleok, rembesan di sungai (Wai) Messe, Mantar, Bobong dan Cecn
Penyelidikan endapan batubara di Mampun Pandan ini dalam rangka kerja sama antara Ditektorat Batubara dengan Perum Tambang Batubara yang tertuang dalam Perjanjian Kerjasama No. J2/Ji.Du /055/86 tanggal 20 September 1986.
Survei tinjau gambut dilakukan di wilayah administrasi Kabupaten Banyuasin yang memiliki indikasi endapan gambut. Area yang memiliki indikasi endapan gambut diantaranya adalah Kecamatan Selat Penuguan, Kecamatan Banyuasin II, Kecamatan Air Salek, Kecamatan Muara Padang, Kecamatan Karang Agung Ilir, Kecamatan Makarti Jaya, Kecamatan Muara Sugihan dan Kecamatan Air Kumbang. Secara geologi, daera…