Thursday, June 04, 2015

China offers a clue to geological instabiliy in the region.


LHASA, June 2 (Xinhua) -- Nam Co, (click here) the world's highest saltwater lake, has grown remarkably in volume and surface area in recent years, local observers told Xinhua on Tuesday.

Monitoring data showed that the lake, located in southwest China's Tibet Autonomous Region, has seen its water level rise about 23 centimeters annually since 2003, said Zhang Guoshuai, deputy head of the Nam Co observation station under the Chinese Academy of Sciences (CAS).

It is the largest lake in China by volume and it grew by more than 300 million cubic meters a year over the period, Zhang said.

The lake's surface is 4,725 meters above sea level and its maximum depth is more than 98 meters, he said....


It has to be due to melting and flooding. Water has incredible hydrological power to drive instability leading to earthquakes.

BEIJING (AP) — The death toll in China's latest round of flooding (click here) has risen to at least 52, including two schoolchildren aboard a bus carrying more than twice its authorized passenger load that plunged into a pond, authorities said.

At least six other people are missing in floods that have ravaged mountain districts of six provinces and autonomous regions in central and southeastern China. More than a quarter-million people have been moved to temporary shelters, and major damage has been inflicted on buildings and crops.

Apart from the two schoolchildren, 42 others have died due to floods and heavy rains, including 16 in the collapse of a nine-story building in the city of Guiyang following a landslide.

Seven other people were killed in the central province of Hunan when a bus skidded into a guardrail and overturned....

The region has limited oil and gas interests, but, the assessment may prove helpful if not already known.
 
Petroleum geological data drilling in northern Tibetan Qiangtang basin (click here)

Qiangtang basin which is located in northern Tibetan plateau is a large Mesozoic marine sedimentary basin....


... outcrop gypsum-salt dome structures not far from drilling and it has very good sealing capacity. A lots of tectonic fractures and dissolution fissures are found in cores, tectonic fractures are filled mainly by calcites and dissolution fissures are filled mainly by bitumens. As a result of multi-stage hydrocarbon movements testified by fluorescent sections and fluid inclusion research,...