Research Status and Challenges of High-Purity Quartz …
Research Status and Challenges of High-Purity Quartz Processing Technology from a Mineralogical Perspective in China. by. Ruiyang Zhang. 1,2, Chunhua Tang. 1,*, Wen Ni. 2, Jing Yuan. 1,3, Yu Zhou. 1,4 and. Xiaolong Liu. 1. Basic Geological Survey Institute, Jiangxi Geological Survey Institute, Nanchang 330030, China. 2.
Effect of Quartz Overgrowth on Sandstone Densification
According to the sandstone classification of folk (Folk 1968), the rock types are mainly quartz sandstone and a small amount of lithic quartz sandstone (Fig. 2) and the main body is medium-coarse sandstone. Quartz sandstone is mainly of medium-coarse grain and coarse grain structure, with the main particle size distribution range of …
Resource, characteristic, purification and application of quartz…
Quartz sandstone is a kind of consolidated arenaceous rock, its quartz and siliceous detritus content is generally above 95%. Quartzite is a metamorphic rock formed by regional metamorphism or thermal contact metamorphism of quartz sandstone or other siliceous rocks. China is rich in quartz sandstone and quartzite, but it can only be …
Quartz Sandstone
The quartz sandstones which contained a small quantity of feldspars, siderite, and clay minerals were formed in marine sedimentary basin of the mid-Triassic, and located on the top of coal-bearing strata. The surface of specimen exhibited local red rather than white because of the content and distribution of iron oxide.
Sedimentary characteristics and paleoclimatic significance of …
To explore the genesis and paleoenvironmental characteristics of the Cretaceous red beds in northwest China, 85 samples were collected from three sedimentary profiles (J1–J3) in Longzhou Town, Jingbian County. Sedimentology methods were used to analyze the physical and chemical properties of the sedimentary beds.
China's Amazing Stone Pillars Inspired the 'Avatar' Scenery
Amazing natural quartz sandstone pillar named the Avatar Hallelujah Mountain and other wooded rocks in the Tianzi Mountains, Zhangjiajie National Forest Park, Hunan Province, China. But other than the incredible stones themselves, the area is also home to unique provincial culture.
Sedimentation and mineralization of the Late Paleozoic …
Upper Devonian: The main rock assemblages of the Qizilafu Fm. are medium-grained quartz sandstone, fine-grained calcareous quartz sandstone, fine-grained arkosic quartz sandstone, and a few thinly bedded siltstones, argillaceous siltstones, and …
Crystal chemistry and formation of authigenic chlorite: …
Authigenic chlorite is a crucial diagenetic cement that significant impacts tight sandstone reservoirs. The occurrence, crystal chemistry, formation and influences on reservoirs of different authigenic chlorite types were studied in the Yanchang Formation tight sandstones from the Ordos Basin.
Sedimentology and diagenesis impact on Sanduo formation (E
It is mainly composed of medium sand and fine sandstone supported by ... Smectite to illite reaction at 600–1000 °C also provides the silica source for quartz cement in sandstone reservoirs (Xi ... Bai B, Zhang X, Wang J (2012) Tight gas sandstone reservoirs in China: characteristics and recognition criteria. J Petrol Sci Eng 88:82–91.
Deep Learning for Refined Lithology Identification of Sandstone …
After merging the dataset and conducting quality screening, the number of thin section images exceeded 2000. The main subdivided lithologies include Quartz Lithic Sandstone, Feldspathic Quartz Sandstone, Feldspathic Litharenite, Lithic Sandstone, and Quartz Sandstone, along with a small number of sandstones with complex …
Sedimentary characteristics and paleoclimatic significance of …
To explore the genesis and paleoenvironmental characteristics of the Cretaceous red beds in northwest China, 85 samples were collected from three …
Sedimentation and mineralization of the Late Paleozoic …
Upper Devonian: The main rock assemblages of the Qizilafu Fm. are medium-grained quartz sandstone, fine-grained calcareous quartz sandstone, fine …
Origin of Quartz Cement in the Paleogene Sandstone …
The studied sandstone is classified as immature to mature feldspathic litharenite and lithic arkose and consists of quartz, feldspar, rock fragments and micas. Petrographic studies and SEM analysis shows that the authigenic quartz is acting a significant cement that reduces the reservoir quality.
Sandstone | Composition, Properties, Formation, Uses
Chemical Composition of sandstone usually quartz framework grains are the dominant mineral in clastic sedimentary rocks.Because of they have exceptional physical properties such as hardness and chemical stability.Physcial properties of these quartz grains survive multiple recycling events and also allowing the grains to display …
Types and genesis of sweet spots in the tight sandstone gas …
The Xu2 Member in western Yuanba area is mainly composed of lithic sandstone and feldspathic litharenites and a minor quantity of lithic quartz sandstones and quartz sandstones. These components are primarily medium-grained and secondarily fine- and coarse-grained.
Diagenesis and reservoir quality of deep-lacustrine
Diagenesis and reservoir quality of deep-lacustrine sandy-debris-flow tight sandstones in Upper Triassic Yanchang Formation, Ordos Basin, China: Implications for reservoir heterogeneity and ...
The effect of chlorite rims on reservoir quality in Chang 7 sandstone …
Request PDF | On Sep 1, 2023, Wenchao Dou and others published The effect of chlorite rims on reservoir quality in Chang 7 sandstone reservoirs in the Ordos Basin, China | Find, read and cite all ...
Sandstone sedimentology and stratigraphy
Sandstone is a clastic sedimentary reservoir rock composed of mainly quartz and/or feldspars, and typically deposited by relatively high-energy processes, which winnow out much of the fine particle size …
Sandstone sedimentology and stratigraphy
Sandstone is a clastic sedimentary reservoir rock composed of mainly quartz and/or feldspars, and typically deposited by relatively high-energy processes, which winnow out much of the fine particle size fraction while transporting and depositing the coarser (sand-sized) particles. Like sand, sandstone may be any color, but the most common …
Quartz sandstone peak forest landforms of Zhangjiajie …
The Zhangjiajie Sandstone Peak Forest Geopark in northwest Hunan Province, China, is a comprehensive geopark containing many spectacular quartz sandstone landforms, limestone karst landscapes …
Sandstone – Geology is the Way
White feldspar grain surrounded by a fine-grained clay-rich matrix and transparent quartz grains in a sandstone. Feldspar grains appear often dull (whitish) and opaque due to alteration. Width: about 1.5 cm. Macigno Sandstone. Navacchio, Pisa, Italy. White grain of feldspar, with sharp edges related to the presence of cleavage planes.
Origin of Quartz Cement in the Paleogene Sandstone …
Origin of Quartz Cement in the Paleogene Sandstone Reservoir of Shahejie Formation, Bohai Bay Basin, China. Acta Acta Geologica Sinica (English Edition), 9 6(1): 248–260.
Sandstone sedimentology and stratigraphy
Sandstone is a clastic sedimentary reservoir rock composed of mainly quartz and/or feldspars, and typically deposited by relatively high-energy processes, which winnow out much of the fine particle size fraction while transporting and depositing the coarser (sand-sized) particles.
Research Status and Challenges of High-Purity Quartz …
Research Status and Challenges of High-Purity Quartz Processing Technology from a Mineralogical Perspective in China. by. Ruiyang Zhang. 1,2, …
Fluid evolution and related fluid–rock interactions of the …
Fluid evolution and related fluid–rock interactions of the Oligocene Zhuhai sandstones in the Baiyun Sag, northern margin of the South China Sea
Impact of rock type on the pore structures and physical
The pore–throat systems and physical properties of tight sandstone reservoirs are complex, and deposition is thought to be a fundamental control for them. In this study, the impacts of the full ranges of rock types (from pebbly coarse sandstone to fine sandstone) on the pore structures and physical properties of the Permian tight …
Sandstones in thin section
This sandstone, although >90% quartz, is made up almost entirely of polycrystalline grains where the subcrystals in each grain are equant. ... Grain size is bimodal – medium sand size (about 50%) and very fine sand – silt sized grains. Many sand grains appear to 'float' in the fine fraction.
Water-induced softening behavior of clay-rich sandstone in …
Sandstone is widely distributed in China and is frequently reported during construction of underground projects. ... conducted uniaxial and triaxial compression tests on gray-colored fine-grained sandstone sampled from a deep tunnel under natural and ... The geological units along the tunnel profile include quartz schist (metamorphic), granite ...
Elastic rock properties analysis of diagenetic facies …
Elastic rock properties analysis of diagenetic facies identification of deep tight sandstone in the Xihu Sag, China. Author links open overlay panel Wenguang Wang a b c, Chengyan Lin c, Xianguo Zhang c. Show more ... Quartz cement facies: Fine sandstone: 2.54: 4943: 3124: A1: H4: 3840.43: Calcite cement facies: Fine sandstone: 2.58: 5013: …
Quartz Sandstone
The quartz sandstones which contained a small quantity of feldspars, siderite, and clay minerals were formed in marine sedimentary basin of the mid-Triassic, and located on …
Resource, characteristic, purification and application of …
China is rich in quartz sandstone and quartzite, but it can only be purified into ordinary quartz because of its impurity. The purification of high purity quartz for …
China's Amazing Stone Pillars Inspired the 'Avatar' Scenery
Amazing natural quartz sandstone pillar named the Avatar Hallelujah Mountain and other wooded rocks in the Tianzi Mountains, Zhangjiajie National Forest …
Trace elements in magmatic and hydrothermal quartz
The Xingluokeng deposit is the largest granite-related tungsten deposit within the Wuyi metallogenic belt in South China. The Xingluokeng intrusion primarily consists of porphyritic biotite granite, biotite granite, and fine-grained granite. The deposit is represented by veinlet-disseminated mineralization with K-feldspathization and …
(PDF) Architecture and quantitative assessment of channeled …
Lower Permian Shihezi sandstone in Ordos Basin is the largest gas reservoir in China. Architecture elements of channel, overbank and floodplain facies of braided channel deposits were identified ...