volcanic rocks

Volcanic rocks (along with other types) often contain small, deep holes, as if they had been repeatedly punctured with a needle.

Basic volcanic rocks occur in a relatively extensional environment. The magma comes from the depth with a depleted mantle nature.

Detailed geochronological study shows the mainly eruption ages of these volcanic rocks are Late Cretaceous- Paleogene.

Accurate identification of volcanic rocks in volcanic reservoir description and evaluation is an important basis.

Achondrites are the only known samples of volcanic rocks originating outside the Earth-Moon system.

Typical features of subaqueous volcanic rocks include perlite with glassy structure and pillow structure, lamellar tuff, bentonite.

The mountains consist primarily of volcanic rocks, with some of the lower hills formed of granite.

Carboniferous volcanic rocks in Altay, Xinjiang, mainly exist in its northeastern part. They consist of rhyolite, dacite and cataclastlava.

It may damage the original oil and gas reservoirs, after all, volcanic rocks can form new types of reservoir traps.

The silicic volcanic rocks of Carboniferous times has similar REE and trace elemental geochemistry as continental rhyolite.

Contact relation of subaqueous volcanic rocks and underlying strata is conformity, disconformity or erosion.

The deposits hosted in granite-porphyry and felsic or intermediate volcanic rocks are mostly porphyry type of molybdenum deposits.

Jurassic volcanic rocks in Yingshan fault depression are mainly andesite, basalt, dacite , volcanic breccia and tuff.

The ore forming materials of the deposit were mainly derived from Neogene volcanic rocks and geothermal water.

Volcanic rocks of each cycle have their own features, reflecting different geneses .

Accurate dating for volcanic and sub-volcanic rocks provided reliable data to constrain the tectonic setting for diagenesis.

The bimodal volcanic rocks of Middle Cambrian are major host rocks containing many polymetallic VMS deposits with larger scale.

The developments of volcanic reservoirs in different areas associate with the location of volcanic rocks.

Intracontinental extension tectonics process occurred in Middle Carboniferous-Early Permian which formed a lot of volcanic rocks.

The volcanic rocks in this region were formed no later than the Late Miocene. Considerable magmatic activity appeared during Pleistocene.

Both subaerial and subaqueous volcanic rocks can be found in Yingcheng Formation of Songliao Basin.

Volcanic rocks have high susceptibilities under normal conditions.

Our data show that spatial petrogeochemical variations exist in the volcanic rocks of the Tianshan large igneous province.

Volcanic rocks from inside the field were found to be non-magnetic.

Permian volcanic rocks are formed by intraplate extension after collision stage.

The Jurassic volcanic rocks are belong to K alkaline and came from shallow crust with weak repartition of magma.

The Qi'eshan Group volcanic rocks consist of basalt, basaltic andesite, dacite and rhyolite.

Their sturdy soles crunched over snow on Mount Rainier and timidly trod upon volcanic rocks in Costa Rica.

Those meteorites look similar to volcanic rocks from Earth, and are not metallic in appearance.

Nearly all zeolite deposits in the world result from low-temperature-alteration of glass-bearing volcanic rocks.

but the green submarine volcanic rocks not belong to the Banxi formation and must separate from Jiangnan ancient continent.

Subsequent lava flows deposited volcanic rocks up to 20 meters (65 feet) thick in some places.

The island-arc volcanic rocks are observed in the Upper Triassic Rola Kangri Group.

These volcanic rocks occur as stratified or stratoid beds, and are in conformable contact with the elastic rocks.

The Lancang Ph-- Zn- Ag-Cu polymetallic sulfide deposit is hosted in Carbonifferious volcanic rocks and carbonate.

The massive sulfides related to felsic volcanic rocks in the back-arc and island arc environments have higher content of gold.

Stylolite structure is widely distributed in deep burial acidic volcanic rocks in the northern Songliao Basin.

The volcanic rocks are the products of deep alkaliriched magma differentiation and contain albites.

The main volcanic rocks are pyroclastic rocks and lavas.

Dark-colored ash and tiny volcanic rocks (lapilli) carpet the crater floor.

Many of the suspected meteor-wrongs we receive are common terrestrial volcanic rocks.

The volcanic rocks of the Lower Es3 in Oulituozi region are mainly volcaniclastic rock, basalt and trachyte.

Regional geological survey at the scale of 1: 250000 has mapped the late Cretaceous and middle-late Jurassic volcanic rocks in Nagqu area.

The inner subfacies of extrusive facies of subaqueous volcanic rocks are good reservoirs.

Its volcanic rocks are as diverse as Earth's, and the manifestations of water vary tremendously.

There are various volcanoes and volcanic rocks on the surfaces of terrestrial planets.

and(3)late Carboniferous ophiolite and island arc volcanic rocks located in the Tian Shan.

More than 500 samples of sandstone, limestone and volcanic rocks were collected from 61 sites.

It was in a field of volcanic rocks.

That is to short-circuit the natural geological process of weathering and use the CO2 to convert volcanic rocks into limestone.

Mingxi, Fujian, is a typical location of zircon megacrysts related to volcanic rocks in China.

The volcanic rocks in this region were not only characteristic of vertical partition and evolution, but also of horizontal zoning.

Its host rock is picritic volcanics , which is different from other volcanic rocks related to iron(copper) ore deposit.

the sand on red beach gets its reddish color from the red volcanic rocks that make up the cliffs around the beach

Characteristics of the Early Proterozoic Volcanic Rocks and Its Dynamic Background of Formation in the Liaodong Area

Eruption age of Liangjiangkou volcanic rocks and their genetic relationships with the Xishan granite body in South Hunan Province

Geochemical Characteristics and Tectonic Setting of the Early Carboniferous Volcanic Rocks in East Kunlun Mountains

Geochemical Characteristics and Tectonic Significance of the Early Cretaceous Volcanic Rocks in the Southern Margin of Jiuxi Basin

New model for the U-Th isochron systematics on volcanic rocks and its significance

Discovery of Alkali Volcanic Rocks in the Zhangjiakou Formation of the Duolun Area, Inner Mongolia, and Its Geological Significance

Geochemistry of Mesozoic Mafic-Intermediate Volcanic Rocks and Its Constraints on Lithospheric Characteristics

Petrogenesis and its implication for the middle - late Jurassic intermediate-acidic volcanic rocks in the middle section of Yanshan orogen

Geochemical characteristics and tectonic significance of Carboniferous volcanic rocks in the northern part of the Ili Block, Xinjiang

The petrochemical characteristics and tectonic background of the Carboniferous volcanic rocks in the east part of western Kunlun

Petrological and Geochemical Characteristics of the Carboniferous Volcanic Rocks, South of the Xinyuan County, Xinjiang

Petrological and Geochemical Studies on the Intermediate-Basic Volcanic Rocks from the Middle-South Part of the Da Hinggan Mountains

The genesis of two types of Late Mesozoic intermediate-felsic volcanic rocks in Lishui Basin, Lower Yangtze valley

Geochemical Characteristics of the Mesozoic Volcanic Rocks from the Byers Peninsula of Livingston Island, West Antarctica

Petrogenesis and geodynamic implications of Late Mesozoic mafic volcanic rocks from the Lishui Basin of the Lower Yangtze region

Geochemical Characteristics of Permian Volcanic Rocks from Jianshui, Southeast Yunnan and their Tectonic Implication

Petrological and petrochemical characteristics of Early Cretaceous volcanic rocks in northeast Jiangxi Province

Age of the Mashan volcanic rocks, Guangdong

Definition of Neoproterozoic bimodal volcanic rocks in the south of Hangzhou and its tectonic significance

Petro-geochemical characteristics and tectonic significance of Late Triassic volcanic rocks in Yanbian Area, northeastern China

Geochemistry of the volcanic rocks in the Dapingzhang ore district, Simao, Yunnan province and its tectonic significance

K-Ar Geochronology of Cenozoic Volcanic Rocks of East Depression in Liaohe Basin and Its Geological Significance

Geochemical characteristics of volcanic rocks from Ningwu area, and its significance

Major geochemical characteristics of bimodal volcanic rocks in different geochemical environments

Character of the Xiaodingshan volcanic rocks and its relationship with the gold mineralization, Gansu

Geochemical characteristics and tectonic significance of Cenozoic acid volcanic rocks in Tianshui area, West Qinling Mountains

Features of volcanic rocks and the prospecting direction of rock gold in the upper Heilongjiang

Geochemical characteristics and petrogenesis of Neoproterozoic-Early Cambrian volcanic rocks in Tianshan area

Petrogenesis of the Mesozoic potash rich volcanic rocks in the Luzong basin, Anhui Province: Geochemical constraints

Geochemistry of Meso- and Neoproterozoic intra-oceanic arc volcanic rocks in the eastern segment of the western Kunlun orogenic belt

Geochemical characteristics and geological environment of basement volcanic rocks in Luliang, central region in Junggar basin

Some pyroxene granulite and amphibolite, its components are the equivalent of volcanic rocks;

Chronological evidence of Neoproterozoic volcanic rocks in the eastern segment of the North Qilian Mountains

The discovery of andesite and dacite in Permian to Triassic strata verifies the existence of island-arc volcanic rocks;

Discovery and Geochemistry of Upper Permian Volcanic Rocks in Tongren Area, Qinghai Province and Their Tectonic Significance

Rare Earth, Trace Element Characteristics of High-Mg Volcanic Rocks of Yixian Formation in Sihetun West Liaoning Province and Its Apocalypse

Comparative Studies of Rare Earth Elements for Early Cretaceous Volcanic Rocks along the Southern Segment of Zhangbaling Uplift Belt

Geochemistry and petrogenesis of the alkaline and calc-alkaline series Cenozoic volcanic rocks from Huochetou mountain, Tibetan plateau

The Character and Geological Meaning of Captive Rock of the Lithosphere in the Wudalianchi Potassic Volcanic Rocks

Proterozoic Intraplate Volcanic Rocks in South Qinling Mountains and Their Tectonic Implications

On Spatial Distribution and Signification of Carboniferous Marine Volcanic Rocks in the Southwest Fujian Depression

Research of the Reservoir Physics Properties Characteristics of the Volcanic Rocks of Rhyolite Type

Geochemical features and their geological implications of volcanic rocks from the northern and middle Okinawa Trough

Genesis of Carboniferous volcanic rocks in the eastern Junggar: constraints on the closure of the Junggar Ocean

Petrography and geochemistry of the Cretaceous volcanic rocks in Tingri, southern Xizang

Discovery of Enclaves from Cenozoic Pulu Volcanic Rocks of West Kunlun Mountains and Their Geological Implications

Mineral Chemistry and Genetic Significance of Clinopyroxenes from the Mesozoic Volcanic Rocks in Western Hills of Beijing

Petrochemistry of volcanic rocks of the Yixian volcanic cycle in the Beipiao-Yixian area, western Liaoning

Characteristics of the encountered volcanic rocks in deep gas exploration in Xingcheng Gas Field

Geochemistry and Tectonic Setting of Early Late Paleozoic Felsic Volcanic Rocks from the Altai Orogenic Belt, North Xinjiang

Petrochemistry Features and Its Significance of Ore-search Evaluation in Volcanic Rocks of BAIYINCHANG Ore Field

Geochemistry and their tectonic significance of the volcanic rocks from Tarim micro-plate

Characteristics of Early Jurassic Volcanic Rocks and Their Tectonic Significance in Haidewula, East Kunlun Orogenic Belt, Qinghai Province

Determination and Application of Mercury- injection Capillary Pressure Curve in the Volcanic Rocks of Rhyolite Type

Petrogenesis of typical Mesozoic and Cenozoic volcanic rocks from the North China Craton: new evidence from Hf isotopic studies

Geochemical Features and Tectonic Environment of Mesoproterozoic Xinglongshan Group Volcanic Rocks in Yuzhong Area, Gansu Province

The host rock belongs to volcanic rocks or volcanic-sedimentary rocks in the upper part of ophiolite suite;

Elemental homogenization during weathering and pedogenesis of volcanic rocks from North Da Hinggan Ling

Hydrothermally modified sedex Pb-Zn deposit--A new deposit type in volcanic rocks of the Xiong'er Group, Henan, China

Post-collisional potash-rich volcanic rocks in the north margin of Dabie orogenic belt: geochemistry and petrogenesis

A Discovery of the Mesoproterozoic and Neoproterozoic Volcanic Rocks in the Zhaibian-Gaowu Areas, Guizhou and Its Implication

Isotopic feature and Uranium-series component dating of the volcanic rocks in Okinawa Trough

Geochemical Characteristics and Genesis of Bimodal Volcanic Rocks of Yutian Group in Southern Jiangxi

Geochronology and geochemical characteristics of volcanic rocks section in Manzhouli Xinyouqi, Inner-Mongolia

Lead isotopic composition of volcanic rocks in the Qoltag tectonic belt, East Tianshan, and its significance

Petrogeochemical characteristics and genesis of the Mesozoic volcanic rocks in the Yanshan-Liaoning region

The Rb-Sr age determinations of the "bimodal" volcanic rocks in the Luchun-Hongponiuchang superimposed rift basin, Deqen, Yunnan

Tectonic attribute and geochronology of meta-volcanic rocks, Tunchang, Hainan Island

Rare earth element characteristics of volcanic rocks from Yixian formation of Western Liaoning

Geochemical Evidence of Volcanic Rocks for Determining the South Lancangjiang Suture Zone

Identification of Potential Volcanic Rocks Reservoir in Karamay Oilfield

Geochemistry and tectonic setting of basic volcanic rocks in Ke-Xia region, northwestern Junggar Basin

Application of synthetic seismogram in identification of volcanic rocks in the center of Tarim area

The Magma Source of Mesozoic Volcanic Rocks in Yanbian Area: Evidence from Sr- Nd Isotopes and Deep-Seated Xenoliths(Xenocrysts)

The geochemical features of volcanic rocks and architectonic environment in Neopaleozoic era, Santanghu basin

Searching for Rich Uranium Layers of Volcanic Rocks by Measuring Potential Difference

U-Pb Ages and Oxygen Isotope Compositions of Zircons from Post-Collisional Volcanic Rocks of Dabieshan

Geochemistry and petrogenesis of the Triassic volcanic rocks in the east-central segment of Tethyan Himalaya

Discrimination of OIB Volcanic Rocks of Bikou Group and Their Tectonic Implication

Reservoir Properties and Effect Factors on Volcanic Rocks of Basement beneath Wucaiwan Depression, Junggar Basin

Late Jurassic-Early Cretaceous geodynamic setting in middle-northern Gangdese: New insights from volcanic rocks

Classification and Characteristics of Oil and Gas Reservoir Beds of Volcanic Rocks

Genesis of the Xishan high-K calc-alkaline volcanic rocks in South Hunan Province

Geochemistry of Mesozoic volcanic rocks in Da Hinggan Ling: The bimodal volcanic rocks

Metamorphism of xiong'er group volcanic rocks in Machaoyin fault zone and its northern side

Petrochemical characteristics and tectonic setting of volcanic rocks from Tokuzidaban Group in eastern Kunlunmountains

Features and tectonic setting of Late Permian Nayixiong Fm. Volcanic rocks in the source area of the Yangtze River

Isotope Chronological Studies of Late Yanshanian Volcanic Rocks in Northeast Jiangxi Province

Geochemical characteristics and geodynamic significance of the Linzizong Group volcanic rocks in the Gangdise area

A Study on the mantle xenoliths in the Cenozoic volcanic rocks from Maguan Area, Yunnan Province

Classification and correlation of Permian volcanic rocks in Mid-Tarim area

Evolvement sequence of Tertiary volcanic rocks in the Nanpu sag, Eastern China

Structure and Facies of the Volcanic Rocks in Jingangtai National Geo-Park, Dabie Mountain

Geochemistry and tectonic settings of Permian volcanic rocks in Santanghu basin, Xinjiang

Analysis on Oil and Gas Reservoir Characteristics of Volcanic Rocks

The petrology of the volcanic rocks in Tengchong, Yunnan

Comprehensive evaluation of gas-bearing traps in volcanic rocks of Xujiaweizi depression

Identify lithology of volcanic rocks by fuzzy mathematics

A Study on Lithology Identification Methods for Volcanic Rocks

A Study of Volcanic Rocks in Orogenic Belts

Geochemical Features and Origin of Volcanic Rocks of Tiaojishan Formation in Western Hills of Beijing

Geology-geochemistry and Genesis of Quaternary Volcanic Rocks in the Feiyunshan Area, West Kunlun

Reservoir space feature and evolution of the volcanic rocks in the Santanghu basin

Prediction of Deep Volcanic Rocks in Wu-Xia Fault Belt by Seismic Attributes

Distribution volcanic rocks and their effect on oil and gas reservoirs

Island Arc Volcanic Rocks in the North Qaidam UHP Metamorphic Belt

Volcanic Rocks of Jinningian Oceanic Islands in the Bachu Area, Western Xinjiang

Petrology and genesis of Mesozoic volcanic rocks in Tuo32 well block of Liaohe oilfield

Discovery of volcanic rocks in the Zhulazaga gold deposit, Inner Mongolia

Outlining of High Volcanic Rocks and the Calculation Method for Their Top Buried Depth and Thickness

Chronologic Study on Volcanic Rocks in the Mt. Yandangshan World Geopark

The new discussion on the palaeoweathering of volcanic rocks of Dahongyu formation in Yanshan area

Melt structure of Jingpohu Holocene volcanic rocks and its relation to some magmatic dynamics

The Columnar Joint Landscape of Mesozoic Acidic Volcanic Rocks in China