Chemical analyses of basaltic rocks from the Basic Igneous Complex of the Pacific coastal areas of northern South America clearly demonstrate a consistent tholeiitic affinity for this belt and a geochemical similarity of samples from Ecuador, Colombia, and Panama. The rocks are more like ocean-ridge tholeiites than other varieties, but they have higher than expected K, Sr, and Rb contents. Most probably, alteration has caused these anomalies, but a firm conclusion has been frustrated by the lack of correlation of concentration of these elements with the degree of three types of microscopically observable secondary mineralogic changes in the rocks. The rocks form a bimodal geochemical population, about two-thirds basalt and one-third basalti...
Paleoproterozoic basaltic, andesitic and rhyolitic dykes crosscut the Archaean Carajas basement. Bas...
Major and trace element (including REE) geochemistry of basalts and chilled basaltic glasses from th...
7 km of the stratotype for the early Proterozoic Mazaruni greenstone b lt, N Guyana. Basalts and gab...
Chemical analyses of basaltic rocks from the Basic Igneous Complex of the Pacific coastal areas of n...
Two new chemical analyses show that tholeiitic lava on the coastal plain of Ecuador is similar to ba...
Two new chemical analyses show that tholeiitic lava on the coastal plain of Ecuador is similar to ba...
Mafic tholeiitic basalts from the Nejapa and Granada (NG) cinder cone alignments provide new insight...
Tholeiitic basalts were obtained from basaltic basement ranging in age from 6 to 17 m.y. on IPOD/DSD...
Tholeiitic basalts were obtained from basaltic basement ranging in age from 6 to 17 m.y. on IPOD/DSD...
This study focuses on mafic volcanic rocks from the Bouvet triple junction, which fall into six geoc...
character, is constructed almost entirely of Cretaceous sedimentary and volcanic rocks. The Diabase ...
Whole-rock geochemical data on basaltic to rhyolitic samples from 12 late Pleistocene-Holocene cente...
The Leg 81 basalts, drilled either from the margins ("dipping reflectors " sequence: Holes...
Accreted terranes comprising Mid to Late Cretaceous picrites, basalts an oceanic spreading centre, a...
Deep basement penetration during Legs 69 and 70 at Hole 504B in the Panama Basin allowed the recover...
Paleoproterozoic basaltic, andesitic and rhyolitic dykes crosscut the Archaean Carajas basement. Bas...
Major and trace element (including REE) geochemistry of basalts and chilled basaltic glasses from th...
7 km of the stratotype for the early Proterozoic Mazaruni greenstone b lt, N Guyana. Basalts and gab...
Chemical analyses of basaltic rocks from the Basic Igneous Complex of the Pacific coastal areas of n...
Two new chemical analyses show that tholeiitic lava on the coastal plain of Ecuador is similar to ba...
Two new chemical analyses show that tholeiitic lava on the coastal plain of Ecuador is similar to ba...
Mafic tholeiitic basalts from the Nejapa and Granada (NG) cinder cone alignments provide new insight...
Tholeiitic basalts were obtained from basaltic basement ranging in age from 6 to 17 m.y. on IPOD/DSD...
Tholeiitic basalts were obtained from basaltic basement ranging in age from 6 to 17 m.y. on IPOD/DSD...
This study focuses on mafic volcanic rocks from the Bouvet triple junction, which fall into six geoc...
character, is constructed almost entirely of Cretaceous sedimentary and volcanic rocks. The Diabase ...
Whole-rock geochemical data on basaltic to rhyolitic samples from 12 late Pleistocene-Holocene cente...
The Leg 81 basalts, drilled either from the margins ("dipping reflectors " sequence: Holes...
Accreted terranes comprising Mid to Late Cretaceous picrites, basalts an oceanic spreading centre, a...
Deep basement penetration during Legs 69 and 70 at Hole 504B in the Panama Basin allowed the recover...
Paleoproterozoic basaltic, andesitic and rhyolitic dykes crosscut the Archaean Carajas basement. Bas...
Major and trace element (including REE) geochemistry of basalts and chilled basaltic glasses from th...
7 km of the stratotype for the early Proterozoic Mazaruni greenstone b lt, N Guyana. Basalts and gab...