Paleoenvironments and paleogeography of the Lower and lower Middle Jurassic coal measures in the Turpan-Hami oil-prone coal basin, northwestern China

AAPG Bulletin ◽  
2003 ◽  
Vol 87 (2) ◽  
pp. 335-355 ◽  
Author(s):  
Longyi Shao ◽  
Pengfei Zhang ◽  
Jason Hilton ◽  
Rod Gayer ◽  
Yanbin Wang ◽  
...  
Keyword(s):  
Middle Jurassic ◽  
Northwestern China ◽  
Coal Basin ◽  
Jurassic Coal ◽  
Coal Measures

Sequence stratigraphy and paleogeography of the Middle Jurassic coal measures in the Yuqia coalfield, northern Qaidam Basin, northwestern China

AAPG Bulletin ◽  
2014 ◽  
Vol 98 (12) ◽  
pp. 2531-2550 ◽  
Author(s):  
Meng Li ◽  
Longyi Shao ◽  
Jing Lu ◽  
Baruch Spiro ◽  
Huaijun Wen ◽  
...  
Keyword(s):  
Sequence Stratigraphy ◽  
Middle Jurassic ◽  
Qaidam Basin ◽  
Northwestern China ◽  
Jurassic Coal ◽  
Coal Measures

What we know (and what we don't) about the petroleum prospectivity of the Northland Basin, North Island, New Zealand

2009 ◽  
Vol 49 (1) ◽  
pp. 383 ◽  
Author(s):  
Chris Uruski
Keyword(s):  
New Zealand ◽  
Early Cretaceous ◽  
Late Cretaceous ◽  
Middle Jurassic ◽  
Source Rocks ◽  
The West ◽  
Eastern Margin ◽  
Gondwana Margin ◽  
Jurassic Coal ◽  
Coal Measures

The offshore Northland Basin is a major sedimentary accumulation lying to the west of the Northland Peninsula of New Zealand. It merges with the Taranaki Basin in the south and its deeper units are separated from Deepwater Taranaki by a buried extension of the West Norfolk Ridge. Sedimentary thicknesses increase to the northwest and the Northland Basin may extend into Reinga. Its total area is at least 65,000 km2 and if the Reinga Basin is included, it may be up to 100,000 km2. As in Taranaki, petroleum systems of the Northland Basin were thought to include Cretaceous to Recent sedimentary rocks. Waka Nui–1 was drilled in 1999 and penetrated no Cretaceous sediments, but instead drilled unmetamorphosed Middle Jurassic coal measures. Economic basement may be older meta-sediments of the Murihiku Supergroup. Thick successions onlap the dipping Jurassic unit and a representative Cretaceous succession is likely to be present in the basin. Potential source rocks known to be present include the Middle Jurassic coal measures of Waka Nui–1 and the Waipawa Formation black shale. Inferred source rocks include Late Jurassic coaly rocks of the Huriwai Beds, the Early Cretaceous Taniwha Formation coaly sediments, possible Late Cretaceous coaly units and lean but thick Late Cretaceous and Paleogene marine shales. Below the voluminous Miocene volcanoes of the Northland arc, the eastern margin of the basin is dominated by a sedimentary wedge that thickens to more than two seconds two-way travel time (TWT), or at least 3,000 m, at its eastern margin and appears to have been thrust to the southwest. This is interpreted to be a Mesozoic equivalent of the Taranaki Fault, a back-thrust to subduction along the Gondwana Margin. The ages of sedimentary units in the wedge are unknown but are thought to include a basal Jurassic succession, which dips generally to the east and is truncated by an erosional unconformity. A southwestwards-prograding succession overlies the unconformity and its top surface forms a paleoslope onlapped by sediments of Late Cretaceous to Neogene ages. The upper succession in the wedge may be of Early Cretaceous age—perhaps the equivalent of the Taniwha Formation or the basal succession in Waimamaku–2. The main part of the basin was rifted to form a series of horst and graben features. The age of initial rifting is poorly constrained, but the structural trend is northwest–southeast or parallel to the Early Cretaceous rifting of Deepwater Taranaki and with the Mesozoic Gondwana margin. Thick successions overlie source units which are likely to be buried deeply enough to expel oil and gas, and more than 70 slicks have been identified on satellite SAR data suggesting an active petroleum system. Numerous structural and stratigraphic traps are present and the potential of the Northland Basin is thought to be high.

Sequence Stratigraphy of the Jurassic Coal Measures in Northwestern China

2012 ◽  
Vol 86 (3) ◽  
pp. 769-778 ◽  
Author(s):  
WANG Tong ◽  
SHAO Longyi ◽  
TIAN Ye ◽  
LU Jing ◽  
WANG Wenlong
Keyword(s):  
Sequence Stratigraphy ◽  
Northwestern China ◽  
Jurassic Coal ◽  
Coal Measures

Sedimentology and Coalbed Methane Geology of Middle Jurassic Coal Measures in Juhugeng Mine, Qinghai Province

2013 ◽  
Vol 734-737 ◽  
pp. 156-160
Author(s):  
Meng Li ◽  
Zheng Fei Zhang ◽  
Sheng Zhang ◽  
Ming Ming Wang ◽  
Xiang Dong Gao ◽  
...  
Keyword(s):  
Coal Mine ◽  
Middle Jurassic ◽  
Coalbed Methane ◽  
Braided River ◽  
Coal Seams ◽  
Isothermal Adsorption ◽  
Qinghai Province ◽  
Mine Area ◽  
Jurassic Coal ◽  
Coal Measures

Field-based lithofacies in the Middle Jurassic coal measures of the Juhugeng coal mine area of Qinghai Province have been identified employing lithology, geometry and lateral facies relationships. The coal measures were deposited in a range of environments spanning from braided river, delta to lake, and economic coal seams have been formed in the deltaic interdistributary bay and fluvial flood basin environments. The coal has a rank ranging from gas coal to coking coal, and the vitrinite macerals have a relatively high content, being from 60%~80%. Cleats and fractures of coal reservoirs are well developed. The isothermal adsorption experiments reveal that coal in the Juhugeng mine has relatively low Langmuir volume and relatively high Langmuir pressure with low to medium absorbability. All these conditions are beneficial to the formation and preservation of the coalbed methane.

The Relationship between Jurassic Coal Measures and Sandstone-type Uranium Deposits in the Northeastern Ordos Basin, China

2016 ◽  
Vol 90 (6) ◽  
pp. 2117-2132 ◽  
Author(s):  
Yangquan JIAO ◽  
Liqun WU ◽  
Hui RONG ◽  
Yunbiao PENG ◽  
Aisheng MIAO ◽  
...  
Keyword(s):  
Ordos Basin ◽  
Uranium Deposits ◽  
Jurassic Coal ◽  
Coal Measures ◽  
The Relationship

Stratigraphie du bassin houiller de Lons-le-Saunier (Jura); note preliminaire

1960 ◽  
Vol S7-II (5) ◽  
pp. 651-652
Author(s):  
Charles Greber ◽  
G. Lienhardt
Keyword(s):  
Coal Basin ◽  
Coal Measures

Abstract Paleobotanic evidence confirms the presence of a lower and a middle Stephanian zone in the Carboniferous coal measures of the Lons-le-Saunier coal basin (Jura, France).

Sequence paleogeography and coal accumulation of the Early–Middle Jurassic in central Qilian Mountain belt (Muli Basin), Qinghai Province, northwestern China

AAPG Bulletin ◽  
2018 ◽  
Vol 102 (09) ◽  
pp. 1739-1762 ◽  
Author(s):  
Xiaoxu Shang ◽  
Longyi Shao ◽  
Wenlong Zhang ◽  
Jinggao Lv ◽  
Weichao Wang ◽  
...  
Keyword(s):  
Middle Jurassic ◽  
Northwestern China ◽  
Qilian Mountain ◽  
Qinghai Province ◽  
Mountain Belt ◽  
Coal Accumulation
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