China worries continue to weigh on miners, with the likes of Fresnillo, Xstrata and Kazakhmys leading the sector lower.Reports that several Chinese banks increased their reserves after being told to last week by China's central bank hit an already jittery market for mining shares.Energy stocks fare little better with Cairn Energy and Tullow Oil bearing the brunt of selling pressure after crude fell to under $75 per barrel.With the mood remaining bearish, defensive stocks are back in favour, with tobacco conglomerate Imperial Tobacco, energy grid outfit National Grid plus food retailers Morrisons, Marks & Spencer and Tesco the favoured picks.FTSE 100 - RisersStandard Chartered (STAN) 1,467.50p +1.56%British Land Co (BLND) 444.80p +1.48%Carnival (CCL) 2,278.00p +1.47%Imperial Tobacco Group (IMT) 2,018.00p +1.36%Invensys (ISYS) 305.60p +1.29%Thomas Cook Group (TCG) 235.20p +1.25%SEGRO (SGRO) 319.90p +1.23%Morrison (Wm) Supermarkets (MRW) 294.40p +1.20%FTSE 100 - FallersICAP (IAP) 381.20p -3.44%Fresnillo (FRES) 691.00p -3.29%Kazakhmys (KAZ) 1,269.00p -2.68%Lloyds Banking Group (LLOY) 51.62p -2.46%Xstrata (XTA) 1,075.50p -2.45%Tullow Oil (TLW) 1,232.00p -2.30%London Stock Exchange Group (LSE) 647.00p -2.19%Randgold Resources (RRS) 4,485.00p -1.97%