Mud Volcanoes : AZERBAIJAN
The term mud volcano or mud dome is used to refer to formations created by geo-excreted liquids and gases, although there are several different processes which may cause such activity. It is estimated that 300 of the planet's estimated 700 mud volcanoes are found in Gobustan, Azerbaijan and the Caspian Sea. In Azerbaijan, eruptions are driven from a deep mud reservoir which is connected to the surface even during dormant periods, when seeping water still shows a deep origin. Seeps have temperatures up to 2–3 °C above the ambient temperature. In 2001, one mud volcano 15 kilometers from Baku made world headlines when it suddenly started spewing flames 15 m high. The term mud volcano or mud dome is used to refer to formations created by geo-excreted liquids and gases, although there are several different processes which may cause such activity. Temperatures are much cooler than igneous processes. The largest structures are 10 km in diameter and reach 700 metres in height. About 86% of released gases are methane, with much less carbon dioxide and nitrogen emitted. Ejected materials often are a slurry of fine solids suspended in liquids which may include water (frequently acidic or salty) and hydrocarbon fluids.
A mud volcano may be the result of a piercement structure created by a pressurized mud diapir which breaches the Earth's surface or ocean bottom. Temperatures may be as low as the freezing point of ejected materials, particularly when venting is associated with the creation of hydrocarbon clathrate hydrate deposits. Mud volcanoes are often associated with petroleum deposits and tectonic subduction zones and orogenic belts; hydrocarbon gases are often erupted. They are also often associated with lava volcanoes; in the case of such close proximity, mud volcanoes emit incombustible gases including helium, whereas lone mud volcanoes are more likely to emit methane. In Azerbaijan, eruptions are driven from a deep mud reservoir which is connected to the surface even during dormant periods, when seeping water still shows a deep origin. Seeps have temperatures up to 2–3 °C above the ambient temperature.[1] Approximately 1,100 mud volcanoes have been identified on land and in shallow water. It has been estimated that well over 10,000 may exist on continental slopes and abyssal plains. Mud volcanoes are frequently associated with earthquake zones. Many scientists suggest monitoring gas emissions and activity of mud volcanoes, because they can be suitable to predict strong earthquakes
Mud volcanoes are generally few in Europe, but dozens can be found on the Taman Peninsula of Russia and the Kerch Peninsula of southeastern Ukraine. In Italy, they are common in the northern front of the Apennines and in Sicily. Another relatively accessible place where mud volcanoes can be found in Europe are the Berca Mud Volcanoes near Berca in Buzău County, Romania, close to the Carpathian Mountains. Many mud volcanoes exist on the shores of the Black Sea and Caspian Sea. Tectonic forces and large sedimentary deposits around the latter have created several fields of mud volcanoes, many of them emitting methane and other hydrocarbons. Features over 200 meters high exist in Azerbaijan, with large eruptions sometimes producing flames of similar scale (see below). Iran and Pakistan also possess mud volcanoes in the Makran range of mountains in the south of the two countries. China has a number of mud volcanoes in Xinjiang province. There are also mud volcanoes at the Arakan Coast in Myanmar. There are two active mud volcanoes in South Taiwan, and several inactive ones. The island of Baratang, part of the Great Andaman archipelago in the Andaman Islands, Indian Ocean, has several sites of mud volcanic activity. There was a significant eruption event in 2003. A drilling accident offshore of Brunei in 1979 caused a mud volcano which took 20 relief wells and nearly 30 years to stop the eruption. Drilling or an earthquake may have resulted in the Sidoarjo mud flow on May 29, 2006, in the Porong subdistrict of East Java province, Indonesia. The mud covered about 440 hectares, or 1,087 acres (4.40 km2), and inundated four villages, homes, roads, rice fields, and factories and displaced about 24,000 people, killing 14. The gas exploration company was operated by PT Lapindo Brantas. In 2008, it was termed the world's largest mud volcano and is beginning to show signs of catastrophic collapse, according to geologists who have been monitoring it and the surrounding area. A catastrophic collapse could sag the vent and surrounding area by up to 150 meters in the next decade. In March 2008, the scientists observed drops of up to 3 meters in one night. Most of the subsidence in the area around the volcano is more gradual, at around 0.1 cm per day. Now named Lusi, the mud volcano appears to be a hydrocarbon/hydrothermal hybrid. Lusi is actually a contraction of Lumpur Sidoarjo, where lumpur is the Indonesian word for "mud".
The term mud volcano or mud dome is used to refer to formations created by geo-excreted liquids and gases, although there are several different processes which may cause such activity. It is estimated that 300 of the planet's estimated 700 mud volcanoes are found in Gobustan, Azerbaijan and the Caspian Sea. In Azerbaijan, eruptions are driven from a deep mud reservoir which is connected to the surface even during dormant periods, when seeping water still shows a deep origin. Seeps have temperatures up to 2–3 °C above the ambient temperature. In 2001, one mud volcano 15 kilometers from Baku made world headlines when it suddenly started spewing flames 15 m high. The term mud volcano or mud dome is used to refer to formations created by geo-excreted liquids and gases, although there are several different processes which may cause such activity. Temperatures are much cooler than igneous processes. The largest structures are 10 km in diameter and reach 700 metres in height. About 86% of released gases are methane, with much less carbon dioxide and nitrogen emitted. Ejected materials often are a slurry of fine solids suspended in liquids which may include water (frequently acidic or salty) and hydrocarbon fluids.
A mud volcano may be the result of a piercement structure created by a pressurized mud diapir which breaches the Earth's surface or ocean bottom. Temperatures may be as low as the freezing point of ejected materials, particularly when venting is associated with the creation of hydrocarbon clathrate hydrate deposits. Mud volcanoes are often associated with petroleum deposits and tectonic subduction zones and orogenic belts; hydrocarbon gases are often erupted. They are also often associated with lava volcanoes; in the case of such close proximity, mud volcanoes emit incombustible gases including helium, whereas lone mud volcanoes are more likely to emit methane. In Azerbaijan, eruptions are driven from a deep mud reservoir which is connected to the surface even during dormant periods, when seeping water still shows a deep origin. Seeps have temperatures up to 2–3 °C above the ambient temperature.[1] Approximately 1,100 mud volcanoes have been identified on land and in shallow water. It has been estimated that well over 10,000 may exist on continental slopes and abyssal plains. Mud volcanoes are frequently associated with earthquake zones. Many scientists suggest monitoring gas emissions and activity of mud volcanoes, because they can be suitable to predict strong earthquakes
Mud volcanoes are generally few in Europe, but dozens can be found on the Taman Peninsula of Russia and the Kerch Peninsula of southeastern Ukraine. In Italy, they are common in the northern front of the Apennines and in Sicily. Another relatively accessible place where mud volcanoes can be found in Europe are the Berca Mud Volcanoes near Berca in Buzău County, Romania, close to the Carpathian Mountains. Many mud volcanoes exist on the shores of the Black Sea and Caspian Sea. Tectonic forces and large sedimentary deposits around the latter have created several fields of mud volcanoes, many of them emitting methane and other hydrocarbons. Features over 200 meters high exist in Azerbaijan, with large eruptions sometimes producing flames of similar scale (see below). Iran and Pakistan also possess mud volcanoes in the Makran range of mountains in the south of the two countries. China has a number of mud volcanoes in Xinjiang province. There are also mud volcanoes at the Arakan Coast in Myanmar. There are two active mud volcanoes in South Taiwan, and several inactive ones. The island of Baratang, part of the Great Andaman archipelago in the Andaman Islands, Indian Ocean, has several sites of mud volcanic activity. There was a significant eruption event in 2003. A drilling accident offshore of Brunei in 1979 caused a mud volcano which took 20 relief wells and nearly 30 years to stop the eruption. Drilling or an earthquake may have resulted in the Sidoarjo mud flow on May 29, 2006, in the Porong subdistrict of East Java province, Indonesia. The mud covered about 440 hectares, or 1,087 acres (4.40 km2), and inundated four villages, homes, roads, rice fields, and factories and displaced about 24,000 people, killing 14. The gas exploration company was operated by PT Lapindo Brantas. In 2008, it was termed the world's largest mud volcano and is beginning to show signs of catastrophic collapse, according to geologists who have been monitoring it and the surrounding area. A catastrophic collapse could sag the vent and surrounding area by up to 150 meters in the next decade. In March 2008, the scientists observed drops of up to 3 meters in one night. Most of the subsidence in the area around the volcano is more gradual, at around 0.1 cm per day. Now named Lusi, the mud volcano appears to be a hydrocarbon/hydrothermal hybrid. Lusi is actually a contraction of Lumpur Sidoarjo, where lumpur is the Indonesian word for "mud".
