1-20 OF 31 RESULTS FOR

Hatillo Formation

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Article
Journal: Economic Geology
Published: 01 March 2014
Economic Geology (2014) 109 (2): 503–512.
... assignments for the Hatillo Formation, which overlies the Los Ranchos Formation, show that it is only slightly younger, opening the possibility that mineralization in the Hatillo Formation could also be related to late stages of Los Ranchos magmatism. Whether these revised Los Ranchos-Hatillo relations...
FIGURES | View All (7)
Series: GSA Memoirs
Published: 01 January 1966
DOI: 10.1130/MEM98-p11
.... Deposition of the Hatillo Limestone of Early Cretaceous age followed the eruption of Los Ranchos rocks. Fine tuffs of the Las Lagunas Formation (Lower Cretaceous?) were deposited conformably upon the limestone. Cenomanian to Lower Maestrichtian deposits of coarse tuff, fine tuff, lapillituff, and quartz...
Journal Article
Journal: Economic Geology
Published: 01 June 2007
Economic Geology (2007) 102 (4): 758–760.
... the opportunity to restate the key district-scale features that led us to conclude that the gold-silver mineralization—along with formation of the adjoining 10-km-long Loma la Cuaba advanced argillic lithocap—took place beneath the Hatillo Limestone, before commenting on Muntean et al.’s (2007) main mine area...
Journal Article
Journal: Economic Geology
Published: 01 June 2007
Economic Geology (2007) 102 (4): 755–757.
... with geologic observations in and around the deposit. The new interpretation of the age of mineralization depends largely on the contention that the Hatillo Limestone, which overlies the Los Ranchos Formation, was replaced along its basal contact by silica and magnetite that are coeval with Pueblo Viejo...
FIGURES
Journal Article
Journal: Economic Geology
Published: 01 November 2006
Economic Geology (2006) 101 (7): 1427–1435.
... four times that of the copper ( Kesler et al., 1981 ). Regionally, the Los Ranchos Formation, host to the Pueblo Viejo deposit, is overlain by the Hatillo Limestone, a massive micritic sequence deposited under shallow-water, reefal conditions during the Albian or Cenomanian (112–93.5 Ma; Ogg et...
FIGURES | View All (5)
Image
Summary of age determinations on volcanic rocks from the Los Ranchos <b>Format</b>...
Published: 01 June 2017
Fig. 13. Summary of age determinations on volcanic rocks from the Los Ranchos Formation (west to east: the Pueblo Viejo district, i.e., area between the road from Cotuí to Maimón and the Hatillo Reservoir; Cevicos-Bayaguana; Sierra del Seibo, close to the Samaná Bay) and ore mineralization
Journal Article
Journal: GSA Bulletin
Published: 01 July 2005
GSA Bulletin (2005) 117 (7-8): 987–995.
... of land-plant remains were found in carbonaceous sediments of the Pueblo Viejo Member ( Kesler et al., 1981 ). The Los Ranchos Formation is covered by the Hatillo Limestone, which appears to form a fringing reef. The Las Canas Limestone, which was originally mapped as a separate unit, is now...
FIGURES | View All (7)
Journal Article
Journal: Economic Geology
Published: 01 March 2005
Economic Geology (2005) 100 (2): 253–272.
...Stephen E. Kesler; Ian H. Campbell; Christopher N. Smith; Chris M. Hall; Charlotte M. Allen Abstract Isotopic analyses were undertaken to clarify age relationships between mineralization in the Pueblo Viejo high-sulfidation epithermal deposit and its host Los Ranchos Formation. This study...
FIGURES | View All (13)
Journal Article
Journal: Economic Geology
Published: 01 June 2017
Economic Geology (2017) 112 (4): 829–853.
...Fig. 13. Summary of age determinations on volcanic rocks from the Los Ranchos Formation (west to east: the Pueblo Viejo district, i.e., area between the road from Cotuí to Maimón and the Hatillo Reservoir; Cevicos-Bayaguana; Sierra del Seibo, close to the Samaná Bay) and ore mineralization...
FIGURES | View All (13)
Journal Article
Published: 01 November 2003
Journal of Paleontology (2003) 77 (6): 1133–1138.
... depression. No ventral depression. The new species takes its name from the Urumaco Formation, Venezuela. The holotype, UNEFM-PF-049, and one paratype, UNEFM-PF-050, from the upper Miocene Urumaco Formation, El Hatillo, locality 2, are deposited in the Universidad Nacional Experimental Francisco...
FIGURES | View All (6)
Image
Comparative models for Pueblo Viejo and more typical bulk-tonnage, high-sul...
Published: 01 November 2006
probably lies at relatively shallow levels within the Hatillo Limestone but did not receive any ascendant hydrothermal contributions. Note the position of silicification and associated magnetite and hematite at the Hatillo Limestone-Los Ranchos Formation contact. Carbonate minerals (CO 3 ) are retained
Image
A. Location of the Dominican Republic in the eastern part of the island of ...
Published: 01 March 2014
Fig. 1 A. Location of the Dominican Republic in the eastern part of the island of Hispaniola in the Caribbean region, showing major tectonic boundaries. B. Location of the Los Ranchos Formation, showing the ultramafic rocks that mark a major Cretaceous suture zone and the Hatillo Thrust
Image
Figure  1 —Reference map of South America to show most of the localities wh...
Published: 01 November 2003
, upper Miocene Urumaco Formation, El Hatillo. Locality 3, lower Miocene Castillo Formation, Cerro La Cruz. Locality 4, upper Miocene to lower Pliocene Cubagua Formation, Cañón de Charagato. Locality 5, upper Miocene Manzanilla Formation and upper Miocene to lower Pliocene Morne Formation, Trinidad
Journal Article
Journal: Economic Geology
Published: 01 June 2015
Economic Geology (2015) 110 (4): 1101–1110.
... ; Cumming and Kesler, 1987 ; Kesler et al., 1991 ). The age of the Los Ranchos Formation is further constrained by late lower Albian (Albian: 113–100 Ma) invertebrate fauna reported from the overlying Rio Hatillo Formation by Myczynski and Iturralde-Vinent (2005) . The age and geologic setting of Au...
FIGURES | View All (6)
Series: AAPG Studies in Geology, AAPG Studies in Geology
Published: 01 January 2009
EISBN: 9781629810300
...) Isabel Formation = Incl. in Perseverancia Formation Fomento Formation = Incl. in Bijabo Formation Santo Domingo-Santa Clara area “Old Volcanics” = Incl. in Mataguá Formation Corojo Formation = Incl. in Mataguá Formation? Hatillo Formation = Incl. in Mataguá Formation Diego...
Journal Article
Journal: AAPG Bulletin
Published: 01 January 1956
AAPG Bulletin (1956) 40 (1): 108–121.
... Cretaceous in age. At another locality (Corozal), smaller Foraminifera indicative of probable Paleocene age and a fauna of minute mollusks and crinoid columnals of uncertain age (more probably Tertiary than Late Cretaceous) have been found in the same sequence of formations. A thick section of beds...
FIGURES | View All (5)
Image
Figure  4 —Otoliths of fossil and living  Plagioscion  species (Perciformes...
Published: 01 November 2003
to 5 mm. 5, 6, Plagioscion urumacoensis n. sp., holotype, UNEFM-PF-049, and 7, 8, paratype, UNEFM-PF-50 from the upper Miocene Urumaco Formation, El Hatillo, locality 2. Scale bar equal to 5 mm. 9, 10, Plagioscion sp. UNEFM-PF-051 from the upper Miocene to lower Pliocene Cubagua Formation
Journal Article
Journal: AAPG Bulletin
Published: 01 July 1974
AAPG Bulletin (1974) 58 (7): 1348–1396.
... pulse which is referred to Turonian-Santonian time. The uplift of this orogene caused the depositional axis to migrate northward so that, during Campanian-Maes-trichtian time, the flysch-like sediments of the Sepur Formation were dumped into a trough which trended northeast-southwest across southern...
FIGURES | View All (30)
Journal Article
Journal: Economic Geology
Published: 01 September 2011
Economic Geology (2011) 106 (6): 1059–1070.
... that are not obvious in the altered rock. However, Los Ranchos Formation rocks below the pyrophyllite-rich upper part are unfoliated. Thus, an alternative interpretation of the field relationships is that the contact between the Hatillo and Los Ranchos is a depositional surface, probably an unconformity...
FIGURES | View All (8)
Journal Article
Journal: Economic Geology
Published: 01 November 2018
Economic Geology (2018) 113 (7): 1653–1655.
... mining companies and the project was shelved. The book does not mention that during this period, from 1950 to 1958, iron ore was mined nearby at Hatillo and Las Lagunas, which a later study has shown to be part of the Pueblo Viejo lithocap. In 1968, Zoppis got an American speculator named Leland P...