Miocene to Recent Rift History of the Virgin Islands Basin from Integration of Offshore Seismic Data, Inland, Striated Fault Planes, and GPS Results

2014 ◽  
Author(s):  
Patrick Loureiro ◽  
Paul Mann ◽  
Guoquan Wang ◽  
Jean-Claude Hippolyte
Keyword(s):  
Seismic Data ◽  
Virgin Islands ◽  
History Of

Introduction

2017 ◽  
Author(s):  
John M. Chenoweth
Keyword(s):  
Twentieth Century ◽  
Seventeenth Century ◽  
Virgin Islands ◽  
Religious Communities ◽  
Background Information ◽  
The Political ◽  
Society Of Friends ◽  
British Virgin Islands ◽  
History Of

This introductory chapter sketches the questions and goals of the overall project and the needed background information about Quakerism. It introduces the Tortola Monthly Meeting of the Religious Society of Friends (“Quakers”) which formed in the British Virgin Islands about 1740 and addresses how archaeology can approach the study of religion and religious communities. This chapter also serves as an introduction to Quakerism itself, including its ideology based on individual, un-mediated communion with God, and a brief history of the group from its foundation in the political and economic turmoil of mid-seventeenth-century England, to the “Quietism” of wealthy “Quaker Grandees” in Philadelphia, to a nineteenth and twentieth century history of schism and reunion around pacifism. The Quaker structure of Monthly, Quarterly, and Yearly meetings is introduced, and connected to both community oversight and support structures. Finally, this chapter introduces three main Quaker ideals—simplicity, equality, and peace—which will be interrogated throughout the work as they change in their interactions with Caribbean slavery and geography.

NEW IDEAS ON THE RIFTING HISTORY AND STRUCTURAL ARCHITECTURE OF THE WESTERN OTWAY BASIN: EVIDENCE FROM THE INTEGRATION OF AEROMAGNETIC, GRAVITY AND SEISMIC DATA

1994 ◽  
Vol 34 (1) ◽  
pp. 529 ◽  
Author(s):  
G.W. O'Brien ◽  
C.V. Reeves ◽  
P.R. Milligan ◽  
M.P. Morse ◽  
E.M. Alexander ◽  
...  
Keyword(s):  
Seismic Data ◽  
Normal Fault ◽  
Magnetic Data ◽  
Data Sets ◽  
Stress Regime ◽  
Petroleum Potential ◽  
History Of ◽  
New Ideas ◽  
Structural Architecture ◽  
Great Australian Bight

The integration of high resolution, image-processed aeromagnetic data with regional geological, magnetic, gravity and seismic data-sets has provided new insights into the structural architecture, rifting history, and petroleum potential of the western onshore and offshore Otway Basin, south-eastern Australia.Three principal structural directions are evident from the magnetic data: NS, NE-ENE and NW-WNW. The structural fabric and regional geological data suggest that the rifting history of the basin may have taken place in two distinct stages, rather than within a simple rift-to-drift framework. The initial stage, from 150 to ~120 Ma, took place within a stress regime dominated by NW-SE extensional transport, similar to that of the basins within the Great Australian Bight to the west. ENE-striking extensional rift segments, such as the Crayfish Platform-Robe Trough and the Torquay Sub-Basin, developed during this period, contemporaneous with the deposition of thick sediments of the Early Cretaceous (Tithonian-Hauterivian) Crayfish Subgroup. In other parts of the basin, NW-striking rift segments, such as the Penola, and perhaps Ardonachie, Troughs onshore, developed within a strongly trans-tensional (left-lateral strike-slip) environment. At ~120 Ma, the regional stress field changed, and the Crayfish Subgroup-aged rift segments were reactivated, with uplift and block faulting extending through to perhaps 117 Ma. Rifting then recommenced at about 117 Ma (contemporaneous with the deposition of the Barremian-Albian Eumeralla Formation), though the extensional transport direction was now oriented NNE-SSW, almost perpendicular to that of the earlier Crayfish Subgroup rift stage. This later rift episode ultimately led to continental breakup at ~96 Ma and produced the 'traditional' normal fault orientations (NW-SE to WNW-ESE) throughout the Otway Basin.

THE HYDROCARBON POTENTIAL OF THE PENOLA TROUGH, OTWAY BASIN

1995 ◽  
Vol 35 (1) ◽  
pp. 358 ◽  
Author(s):  
R. Lovibond ◽  
R.J. Suttill ◽  
J.E. Skinner ◽  
A.N. Aburas
Keyword(s):  
Early Cretaceous ◽  
Seismic Data ◽  
Oil And Gas ◽  
Direct Detection ◽  
Source Rocks ◽  
Well Control ◽  
Potential Reservoir ◽  
Half Graben ◽  
History Of

The Penola Trough is an elongate, Late Jurassic to Early Cretaceous, NW-SE trending half graben filled mainly with synrift sediments of the Crayfish Group. Katnook-1 discovered gas in the basal Eumeralla Formation, but all commercial discoveries have been within the Crayfish Group, particularly the Pretty Hill Formation. Recent improvements in seismic data quality, in conjunction with additional well control, have greatly improved the understanding of the stratigraphy, structure and hydrocarbon prospectivity of the trough. Strati-graphic units within the Pretty Hill Formation are now mappable seismically. The maturity of potential source rocks within these deeper units has been modelled, and the distribution and quality of potential reservoir sands at several levels within the Crayfish Group have been studied using both well and seismic data. Evaluation of the structural history of the trough, the risk of a late carbon dioxide charge to traps, the direct detection of gas using seismic AVO analysis, and the petrophysical ambiguities recorded in wells has resulted in new insights. An important new play has been recognised on the northern flank of the Penola Trough: a gas and oil charge from mature source rocks directly overlying basement into a quartzose sand sequence referred to informally as the Sawpit Sandstone. This play was successfully tested in early 1994 by Wynn-1 which flowed both oil and gas during testing from the Sawpit Sandstone. In mid 1994, Haselgrove-1 discovered commercial quantities of gas in a tilted Pretty Hill Formation fault block adjacent to the Katnook Field. These recent discoveries enhance the prospectivity of the Penola Trough and of the Early Cretaceous sequence in the wider Otway Basin where these sediments are within reach of the drill.

Mass stranding of pygmy killer whales (Feresa attenuata) in the British Virgin Islands

2000 ◽  
Vol 80 (2) ◽  
pp. 383-384 ◽  
Author(s):  
Antonio A. Mignucci-Giannoni ◽  
Gian M. Toyos-González ◽  
Janice Pérez-Padilla ◽  
Marta A. Rodríguez-López ◽  
Julie Overing
Keyword(s):  
New Record ◽  
Killer Whale ◽  
Caribbean Sea ◽  
First Record ◽  
Virgin Islands ◽  
Killer Whales ◽  
British Virgin Islands ◽  
History Of ◽  
The Caribbean ◽  
Mass Stranding

The pygmy killer whale (Feresa attenuata) is an offshore, tropical and subtropical delphinid found in the Atlantic, Indian and Pacific Oceans. The species has only recently been studied, mostly from specimens collected from strandings. While over 52 reports exist for the Atlantic Ocean, only one record exists for the Caribbean Sea. A new record of a mass stranding of pygmy killer whales from the British Virgin Islands is documented and the pathology and life history of the specimens is described, associating the stranding process with the meteorological and oceanographic disturbance of Hurricane Marilyn, which devastated the Virgin Islands a day prior to the stranding. This stranding event constitutes the sixth known mass stranding for the species worldwide, the first record for pygmy killer whales for the northeastern Caribbean and the second for the entire Caribbean Sea.

A history of desalting water in the Virgin Islands

Desalination ◽  
1984 ◽  
Vol 50 ◽  
pp. 87-101 ◽  
Author(s):  
O.K. Buros
Keyword(s):  
Virgin Islands ◽  
History Of

scholarly journals The Study of Seafloor Tin Placer Resources of Quaternary Sediment at Toboali Waters, South Bangka

2017 ◽  
Vol 31 (2) ◽  
Author(s):  
Muhammad Zulfikar ◽  
Noor CD Aryanto
Keyword(s):  
Source Rock ◽  
Seismic Data ◽  
Data Interpretation ◽  
Placer Deposit ◽  
Rock Weathering ◽  
Sediment Thickness ◽  
Quaternary Sediment ◽  
History Of ◽  
Sediment Cover ◽  
Tin Deposit

Bangka Island has primary and secondary tin deposit. However, along the history of tin mining has been done the primary tin deposit domination is less than secondary tin deposit. Secondary tin deposit is formed from Granitic S-type source rock weathering and then transported by gravity. After that, Cassiterite mineral (SnO2) accumulates and forms a placer deposit in the study area. The thickness of sediment cover at Toboali Waters is quite diverse, with a range between 5-20 milliseconds, by knowing the quarter sediment thickness using seismic data interpretation results, is expected to give an idea about tin placer deposit potential in Toboali waters. Based on the Isochron map shows patterns of quaternary sediment thickening to the southwest, south and southeast of Bangka Island.Keywords: Quaternary sediment, placer deposit, isochron map, Toboali WatersPulau Bangka memiliki endapan timah primer dan endapan timah sekunder. Namun, sepanjang sejarah penambangan timah yang telah dilakukan endapan timah primer tidak mendominasi jika dibandingkan dengan endapan timah sekunder. Pembentukan endapan timah sekunder berawal dari pelapukan batuan Granit tipe-S yang kemudian mengalami transportasi akibat adanya gravitasi. Setelah itu, mineral kasiterit (SnO2) terakumulasi dan membentuk endapan plaser di daerah penelitian. Ketebalan sedimen penutup di Perairan Toboali berkisar antara 5-20 milidetik, dengan mengetahui ketebalan sedimen kuarter berdasarkan interpretasi data hasil rekaman seismik diharapkan dapat memberikan gambaran tentang potensi endapan timah placer di Perairan Toboali. Berdasarkan atas peta isokron, memperlihatkan bahwa pola penebalan sedimen kuater ke arah baratdaya, selatan dan tenggara Pulau Bangka.Kata kunci : Sedimen kuarter, endapan placer, peta isokron, Perairan Toboali

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