Stratigraphy of Reinga and Aotea basins, NW New Zealand: constraints from dredge samples on regional correlations and reservoir character
Stratigraphy of Reinga and Aotea basins, NW New Zealand: constraints from dredge samples on regional correlations and reservoir character
复制标题
DOI：
10.1080/00288306.2016.1160940
复制
发表时间：
2016-06
影响因子：
2.2
通讯作者：
GH Browne;MJ Lawrence;N. Mortimer;CD Clowes;H. Morgans;C. Hollis;A. Beu;J. Black;R. Sutherland;F. Bache
中科院分区：
文献类型：
--
作者：
GH Browne;MJ Lawrence;N. Mortimer;CD Clowes;H. Morgans;C. Hollis;A. Beu;J. Black;R. Sutherland;F. Bache
在新西兰西北部Reinga和Aotea盆地，在TAN 1312航次期间采集的砂岩、泥岩和石灰岩样品提供了对白垩纪-新近纪层序的年龄和岩性限制。共检测了46个微体古生物和7个大型古生物样品，其中沿着了84个岩石薄片样品。一些进行了检查，通过X射线衍射和孔隙度-渗透率分析。晚白垩世砂岩主要为长石砂岩和岩长石砂岩成分，具有花岗质深成岩和火山岩混合物源;与塔拉纳基盆地的Pakawau群进行对比是适当的。晚白垩世-早第三纪泥岩分布广泛，与新西兰其他地区的Whangai组相以及北岛东部和南岛东部的Weber组和Amuri组的细粒碳酸盐相具有密切的岩相学和年龄相似性。白垩系灰岩和古近系砂岩未采出。碳酸盐岩和泥岩在Reinga和Aotea盆地的新近纪层序中占主导地位;罕见的新近纪砂岩具有化石成分，类似于北岛北方的Waitemata组砂岩。就油气远景而言，白垩系砂岩是一种潜在的储集相，但为岩屑质低渗透性砂岩。
ABSTRACT Sandstone, mudstone and limestone samples dredged in the Reinga and Aotea basins, NW New Zealand during voyage TAN1312 provide age and lithological constraints on the Cretaceous–Neogene succession. A total of 46 micropaleontology and 7 macropaleontology samples were examined along with 84 thin-sectioned petrographical samples. Some were examined by X-ray diffraction and porosity-permeability analyses. Late Cretaceous sandstones are dominated by feldspathic and lithofeldspathic compositions, with mixed granitic plutoniclastic and volcaniclastic provenance; a comparison with Pakawau Group of Taranaki Basin is appropriate. Late Cretaceous–Paleogene mudstones are widespread and display close petrographical and age similarities to the Whangai Formation facies of other parts of New Zealand and fine-grained carbonate facies of the Weber and Amuri formations of eastern North and South Islands, respectively. Cretaceous limestone and Paleogene sandstone were not recovered. Carbonates and mudstones dominate the Neogene succession of Reinga and Aotea basins; rare Neogene sandstones have feldspatholithic compositions and resemble Waitemata Group sandstones of the northern North Island. In terms of petroleum prospectivity, Cretaceous sandstones represent a potential reservoir facies but are lithic with low permeability.