Papers by Donald A Goddard
Marine Geology, Oct 1, 1978
ABSTRACT
Understanding the burial and thermal maturation histories of the strata in the onshore interior s... more Understanding the burial and thermal maturation histories of the strata in the onshore interior salt basins of the north central and northeastern Gulf of Mexico area is critical in petroleum source rock identification and characterization. The burial and thermal maturation histories of the strata in these basins and subbasins are consistent with the rift-related geohistory of these features. Source rock analysis and thermal maturity modeling indicate that lime mudstone of the Upper Jurassic Smackover Formation served as an effective regional petroleum source rock in the North Louisiana Salt Basin, Mississippi Interior Salt Basin, Manila Subbasin and Conecuh Subbasin. The Upper Cretaceous marine shale was an effective local petroleum source rock in the Mississippi Interior Salt Basin and a possible local source bed in the North Louisiana Salt Basin given the proper organic facies. Lower Cretaceous lime mudstone was an effective local petroleum source rock in the South Florida Basin, and these rocks were possible local source beds in the North Louisiana Salt Basin and Mississippi Interior Salt Basin given the proper organic facies. Uppermost Jurassic strata were effective source rocks in Mexico, and therefore, were possible source beds in the North Louisiana Salt Basin given the proper organic facies. Lower Tertiary shale and lignite have been reported to have been source beds in south Louisiana and southwestern Mississippi, but these beds have not been subjected to favorable burial and thermal maturation histories required for petroleum generation in the
That coralgal reefs recover readily from natural disasters is widely known. Storm destruction eve... more That coralgal reefs recover readily from natural disasters is widely known. Storm destruction even embodies aspects of self-rejuvenation and/or extension of the colony, rather like forest fires. Such natural catastrophes do not affect reefs in ways from which they cannot recover; man affects things differently. Reefs are abundant on Venezuelan islands, but are limited to local favorable sites on the Caribbean coast. The increase of wealth and travel since World War II has inadvertently resulted in damage to some reefs at Chichiriviche. The small fringing reef there has changed, in a decade, from a healthy reef with a normal complement of fish to a dull and mostly dead mass under turbid water. The reef is rimmed by dead Acropora palmata in growth position; the A. cervicornis and massive corals are partly dead. Soft algae and bryozoans drape most surfaces and the bottom is coated with mud of loose organic floccules and fine mineral sediment. Udotea is uncommon and apparently decadent. Halimeda and Penicillus are more abundant, but are partly dead an heavily coated with the pervasive floccules. Similar conditions prevail on the southwest side of Cayo de Los Muertos and on the patch reefs in Baha Chichiriviche. This damage is due to increase in human and industrial wastes, consequent upon a new public water supply built in 1963. The developed terrain is of highly permeable quartz or skeletal sand, and is less than 2 m in elevation. Both residential and small industrial sources add locally insupportable amounts of particulate and soluble organic wastes by dumping, drainage, or sewage. A cement company dumps its waste, trash from visiting ships, and the rinse from its kiln into the bay.
Sedimentary Geology, Dec 1, 1991
Marine Geology, Jul 1, 1987
ABSTRACT
Marine Geology, Jul 1, 1991
... volatile-rich magmas to shallow crustal levels in areas where asthenosph-eric melting is taki... more ... volatile-rich magmas to shallow crustal levels in areas where asthenosph-eric melting is takingplace. ... Late Cretaceous to Eocene planktonic foraminifera and stratigraphy of Leg 15 sites in the ... The nature and origin of lamprophyres: Some definitions, distinctions, and derivations ...
Deep-sea research, Dec 1, 1979
... material bears a strong resemblance to the Eocene limestones of the Stylophora group in Jamai... more ... material bears a strong resemblance to the Eocene limestones of the Stylophora group in Jamaica (Port Olarie, Port Antonio, Cambridge district, etc ... MAXWELL AE, RP VON HERZEN, JE ANDREWS, RE BOYCE, ED MILOW, KJ HSU, SF PERCIVAL and T. SAITO (1970) Site 13. ...
The principal research effort for Year 1 of the project is data compilation and petroleum system ... more The principal research effort for Year 1 of the project is data compilation and petroleum system identification. The research focus for the first nine (9) months of Year 1 is on data compilation and for the remainder of the year the emphasis is on petroleum system identification. iv
This report was prepared as an account of work sponsored by an agency of the United States Govern... more This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.
Asoc. Ven. Geol. Min. y Petról, 1975
Nacido en 1940 en Versailles, Francia, llego a Caracas en 1947. Finalizo el Bachillerato en el L... more Nacido en 1940 en Versailles, Francia, llego a Caracas en 1947. Finalizo el Bachillerato en el Liceo Andres Bello en 1960 e ingreso a la Universidad Central de Venezuela graduandose como Geologo en 1967. Desde muy temprana edad Xavier desarrollo un gran interes y amor tanto por Ia naturaleza como por Ia geologia. En la Direccion de Geologia en el entonces Ministerio de Minas e Hidrocarburos (1967-1970) demuestra su capacidad detallista y un gran afan por su profesion, durante los trabajos geologicos en las cuencas de Guarenas-Guatire y Santa Lucia. En el ano 1971 es transferido a la Division de Geologia Marina en el MMH , donde organizo y participo en varios proyectos geologicos a lo largo de Ia costa y plataforma continental venezolana. Durante los anos (1971-1975) en que trabajo en esta dependencia fue autor o coautor de mas de 15 publicaciones. Todos estos trabajos arrojaron nueva e interesante informacion sedimentologica, estratigrafica y de geologia marina, ayudando ...
The only major mercury (cinnabar) mineralization in Venezuela is San Jacinto located to the north... more The only major mercury (cinnabar) mineralization in Venezuela is San Jacinto located to the northeast of the city of Carora, Lara State. It was discovered in the early twentieth century and mined later between 1941 and 1942, producing about four metric tons of Hg. During 1941-1942 and 1968-1970, the site was studied in detail, and it was found that the ore is located in fractured sandstone layers of the Matatere Formation, but the high degree of post-mineralization faulting caused to lack of continuity. This is a hydrothermal (epithermal) deposit similar to Almaden, Spain, but of a much smaller scale. The primary Hg is located in the structure of the minerals of mafic and ultramafic rocks, where it is mobilized by hydrothermal solutions to be precipitated later in the fractured layers of sandstone and graywacke of the Matatere Formation. The mineralized zone is limited to about two hectares, where the layers most enriched in cinnabar were exploited in 1941-1942. Currently the site h...
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Papers by Donald A Goddard