SANTIAGO, Feb 27 (Reuters) - Chile, the world's biggest copper producer, was rocked by a huge magnitude-8.8 earthquake on Saturday, putting at risk operations at several of the country's mid-sized mines around the capital but sparing the massive deposits in the north.
The U.S. Geological Survey said the quake struck 56 miles (90 km) northeast of the city of Concepcion -- which is south of Santiago -- at a depth of 22 miles (35 km) at 3:34 a.m. (0634 GMT).
For a map showing the epicenter, click here
As of 1500 GMT, operations at mines producing about 1 million tonnes a year -- just under one-fifth of the country's total -- had been suspended by the quake, although Codelco said that two of its mines were undamaged by the quake and expected to restart them within hours. [ID:nN27157662]
Here are some facts on key mines in Chile's south-central region:
* Anglo-American's (AAL.L) Los Bronces and El Soldado mines are the closest to the earthquake epicenter. Together they produce around 280,000 tonnes of copper annually. The company is moving ahead with plans to expand its 238,400 tonnes of copper-per-year Los Bronces, one of the world's biggest copper mines.
* Codelco's El Teniente had an output of 404,000 tonnes in 2009. That marked the end of four consecutive years of dwindling output as lower grades at aging mines and labor strikes hit output.
Here is an overview of all major mines in Chile: Mine Location Operator Output Status KM Dist from
Concepcion El Teniente 75km S of Santiago Codelco 404,000 ops suspend 240 Andina 50km NE of Santiago Codelco 210,000 ops suspend 320 Los Bronces 65km NE of Santiago Anglo-American 235,000 shut 335 El Soldado 132km N of Santiago Anglo-American 50,000 shut 400 Los Pelambres 200km NE of SantiagoAntofagasta 310,000 n/a 480 Candelaria FreeportMcMoRan185,000 n/a 650 Escondida far north BHP Billiton 780,000 ops normal 750 Collahuasi far north Xstrata/Anglo 435,000 n/a 1,000 Chuquicamata far north Codelco 565,000 n/a 1,140
* Status as of 1500 GMT on Saturday from Reuters reports.
* Output as of 2009 from Metals Production Database; Teniente/Andina output as of 2009 from company; Bronces/Soldado output as of 2008 from company Website.
* Location is based on company information, public data
* Distance best estimate using company data, Google Maps (Reporting by Alonso Soto; Editing by Jonathan Leff)